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1. REFLECTION OF LIGHT AT CURVED SURFACES As1 1. Write the characteristics of the images formed when an object is kept at distinct locations on the principal axis before a concave mirror 2. Fill the table to represent the characteristics of the images formed when an object is placed at distinct locations in front of a concave mirror on its principal axis 3. Mention two situations for coinciding of reflected light rays with incident rays when they incident on amirror. 4. Find the asked physical quantity with a concave mirror when two of the quantities like object distance, image distance or focal length are given. 5. When, any two of the f, u, and v are given asked to find the other one and also may ask you to find magnification. Write characteristics of the images formed by concave mirrors. As2 1. What would happen if spherical mirrors were not invented? 2. A spherical mirror is broken in to pieces. What happens to its focal length? 3. If a small aperture is at pole of a spherical mirror what would happens to the images formed with that mirror? 4. What changes may happen to the images formed by a concave mirror when an object is moved from towards pole beyond ‘C’ of the mirror on its principal axis? 5. What happens if concave mirrors are used as rearview mirrors of vehicles? As3 1. Write the material required to find the focal length of concave mirror and mention the precautions to be taken. Write the experimental procedure. Suggest a table to record the observations of the experiment. 2. List out the material required and write the experimental procedure to find the image distance using concave mirror when an object is kept in front of it on its principal axis at different locations. As4 1. Ray diagrams may be given. Questions based on them maybe asked such as characteristics of the images. 2. Table containing object distance, image distance, Focal length given. Questions may be asked. As5 1. 2. 3. 4.
Draw ray diagrams to the given conditions when concave/ convex mirrors are used Draw ray diagrams for concave mirrors Complete the ray diagrams for concave mirrors. Correct and redraw the given ray diagrams
As6 1. Write the uses of spherical mirrors. 2. Some numerical problems.
SSC-Phy.Sci. Lesson Wise & Academic standard wise model questions –T.Srinivasa chary -9949502090 –Medchal Dist.
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Ray Diagrams-Practice questions 1. Complete the following ray diagrams.
2. Object is placed at different places on the principle axis of concave mirror. Complete the ray diagram and to find the image position. Also mention the properties of the image formed.
O
O
3. Complete the ray diagram without using the protractor.
4. Correct and re draw the following ray diagrams.
O
I
O I
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5. Complete the following ray diagrams i.
6. Draw the ray diagrams for the following situations i. ii.
mage size is Same as the object Image is enlarged and real
iii. iv.
Image is diminished Virtual image
7. By using the ray diagram find the focal point and radius of curvature of the concave mirror. 8. Draw two incident rays, draw the normals to them and reflection rays for the following mirror.
9. The radius of curvature of a concave mirror is 40 Cm.. A person is standing in front of the concave mirror as shown in the following. Draw the ray diagrams for the following situations. i. ii. iii. iv. v. vi.
10Cm from the pole 15 cm from the focus 50 Cm from the pole 40Cm from the pole To get magnified image where should he stand? To disappear his image where should he stand?10. Correct and re draw the following ray diagrams
O
I
11. Find the image distance for the beside diagram
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2.CHEMICAL EQUATIONS As1 1. Write a balanced chemical equation when lead nitrate reacts with potassium iodide to form lead iodide and potassium nitrate. 2. Balance the given chemical equations step wise. 3. What information does a chemical equation give? / in what way a chemical equation can be interpreted? As2 1. What would happen if chemical equations are not balanced? 2. Some reactants or products are given asked to find other reactants or products in a chemical equation. (ex. What are the products formed in chemical reaction between ferrous and copper sulphate.) 3. Write the products formed when reactants given in a chemical reaction? AS-6 1. Problems solving regarding to mass-mass, mass-volume, volume-volume, no of molecules relationship.
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3.ACIDS, BASES AND SALTS As1 1. 2. 3. 4. 5.
Why hydrogen chloride gas does not exhibit acidic property? Why do we add acid in drop by drop to water to dilute it? Write a short note on pH scale. Write some names of strong acids, strong bases, weak acids and weak bases What are the different chemicals/ salts prepared from common salt?
As2 1. What would happen if pH value of rain water changes? 2. Hydrogen gas is evolved in a chemical reaction between Zinc and HCl. What will happen if Zinc is replaced by Copper/Mg in the reaction? 3. What are the effects if neutralization reactions do not take place? 4. What happens if Cu pieces are added to Fe2SO4 powder? As3 1. Write all the materials required to show that hydrogen gas is evolved when metals react with acids/ bases. Mention the precautions to be taken. Write experimental procedure. 2. List out the materials required to show hydrogen gas is evolved when carbonates react with acids/ bases. Write experimental procedure. Write the precautions to be taken in the experiment. 3. List out the materials required to prove that every compound which contains hydrogen is not an acid. Write the experimental procedure. Write precautions to be taken and observations in the experiment. As4 1. In the following table nature of some solutions are given. Solution HCl NaOH NH4OH HNO3 H2SO4 CH3COOH Mg(OH)2 KOH nature Acid Base Base Acid Acid Acid Base Base Answer the following questions 1. When blue litmus paper is dipped in to the above solutions what happens to its colour? 2. When red litmus paper is dipped in to the above solutions what happens to its colour? 3. Which of the above samples turn methyl orange solution to yellow colour? 4. Which of the above samples turn phenolphthalein indicator in to pink colour? 2. pH values of X, Y, Z solutions are 13, 6, 2 respectively i. Which of the above solutions is a strong acid? ii. In which of the solution ions and solute molecules present in solution? iii. Which of the above solutions is the strong base? Why? iv. What will happen to its PH value of a solution if base is added to a solution? 3. Read the following table and answer the questions given below the table. Solution
Gastric fluid
vinegar
NaOH solution
Washing soda
Lemon juice
Baking soda
Milk of magnesia
Battery acid
pH value 1 3 13.8 13 2.2 8.2 10.6 0 i. Which of the above is strong acid? ii. Which of the above is a weak base? iii. Which of the above solution is given to a person suffering from acidity to get relief? iv. pH value of battery solution is ‘0’. Is it a neutral solution? Why? As6 1. 2. 3. 4. 5.
Write uses of bleaching powder. Write uses of plaster of Paris. Write importance of pH in everyday life. Write uses of washing soda (sodium carbonate) in daily life. Write the uses of baking soda.
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4.REFRACTION OF LIGHT AT CURVED SURFACES As1 1. Write the characteristics of image formed when an object is placed at distinct locations before a convex lens on its principal axis. 2. Fill the table about characteristics of an image formed when an object is placed before convex lens on its principal axis. 3. Quote situations where light rays are not deviated after refraction when light ray incidence on lens. 4. Problems based on refraction of light through biconcave lenses. (f,v,u) 5. Problems based on lens formula. As2 1. What would happen if spherical lenses are not invented? 2. How many images are formed by using a convex lens made up of twodifferent refractive index materials (above ½ with one material, below ½ with another material) 3. What changes may be observed in the image formed when an object is moved from focus of a biconvex lens to beyond ‘C’ on its principal axis? 4. What changes may be observed in the image formed when an object is moved from focus of a concave lens to beyond ‘C’ on its principal axis? 5. Write the characteristics of an image formed by convex lens of a point object placed beyond ‘C’ on its principal axis. As3 1. Write the materials required to find the focal length of biconvex lens and mention the precautions to be taken. Write the experimental procedure. Suggest a table to record the observations of the experiment. 2. List out the materials required and write the experimental procedure to find the image distance using convex lens when an object is kept in front of it on its principal axis at different locations. 3. List out the materials required to show focal length of the lens depends upon the surrounding medium in which it is kept. Write experimental procedure and precautions to be taken. As4 1. Ray diagrams are given. Questions are asked about characteristics of image. 2. Table containing object distance, image distance, Focal length given. Questions may be asked As5 1. Navya thought of getting a positive and magnified image using convex lens. Where shall she keep the object to get the desired image? Draw the ray diagram. Write characteristics of the Image. 2. If radius of curvature of a concave lens is 30cm. i. Draw a ray diagram to show the location of an image formed when an object is placed 25 cm away from concave lens on its principal axis. ii. Where will the image formed when an object placed at center of curvature. Draw ray diagram As6 1. Write uses of lenses in daily life. 2. Problems based on refraction of light.
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Lenses-Ray Diagrams- Practice questions 1. Complete the following ray diagrams.
2. Object is placed at different places on the principle axis of concave mirror. Complete the ray diagram and to find the image position. Also mention the properties of the image formed.
3. Complete the ray diagram.
4. Correct and re draw the following ray diagrams.
O
I
5. Complete the following ray diagrams
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6. Draw the ray diagrams for the following situations to the convex lens Image size Is same size of the object i. Image is enlarged and real ii. Image is diminished iii. Virtual image 7. The focal length of a symmetric convex lens is 25 Cm. Then draw the ray diagrams for the following situations. i.25Cm from the pole ii.15 cm from the focus iii.50 Cm from the pole iv.10Cm from the pole8. Correct/complete and re draw the following ray diagrams
O
I
9. Place the convex lens for the following object and image at suitable place. Support your answer. (‘O” is a object, “I” is image of that object)
O• N1
N2
•I 10. Complete the following ray diagrams
O
I
11. Complete the following ray diagrams
•
•
O
O
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5. HUMAN EYE – THE COLOURFUL WORLD
AS1 1. 2. 3. 4. 5. As2 1. 2. 3. 4. As3 1.
Why the sun is appears red colour during sunset and sunrise? Why the sky does appear blue in colour? Why does sun appear white in colour at noon time? Explain the formation of rainbow in the sky? Write the common defects of vision in human. Explain each of them. What would happen if eye lens doesn’t undergo accommodation? What will happen if celliary muscles don’t work properly? Write the consequences if scattering of light doesn’t take place? Write the consequences if dispersion of light doesn’t take place?
Write the materials required to conduct experiment to determine the least distance of distinct vision and angle of vision. Write the experimental procedure. Mention precautions to be taken in the experiment 2. List out the materials required to find angle of minimum deviation of a triangular prism. Write experimental procedure. Mention few precautions to be taken in the experiment. 3. List out the materials required to form a rainbow in the class room. Write experimental procedure. Mention precautions to be taken in the experiment.
As4 1. 2. 3. 4.
Questions based on the ray diagram of defect of vision may ask. Refractive indices of different material are given. Questions based on it may be asked. Questions based on Formation of rainbow maybe asked. A person suffering from vision defect consulted a doctor. He advised him to use +1.5D powered lens. Find the focal length of the lens. What type of vision defect he is suffering from? 5. Questions based diagrams of refractive index of a prism As5 1. Refractive index of a triangular prism-diargram. As6 Write the names of different lenses used to correct different types of eye vision defects.
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6. ATOMIC STRUCTURE AS1 1. Explain the postulates of Bohr’s atomic model based on atomic spectrum of hydrogen atom. Write the limitations of the atomic model. 2. Write about all quantum numbers. 3. Explain Aufbau principle with an example. 4. Explain Hund’s rule with an example. 5. Explain Pauli’s exclusion principle with an example. 6. Write Electronic configurations of some elements. As2 1. What happens if iron rod is gradually heated? 2. Why can’t we see the light ray path when we use remote control of a TV? As4 1. Quantum numbers of an electron in outer most orbit of an atom are given below. n l ml ms 3 2 0 +1/2 i. What is the outer most shell the element? ii. Write the electron configuration of the element? iii. What is the atomic number of the element? iv. What is the valency of the element? 2. Questions based on electromagnetic spectrum diagram-information. As6 1. Draw shapes of different orbitals. 2. Draw diagram that shows energy levels of atomic orbitals.
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7. CLASSIFICATION OF ELEMENTS – PERIODIC TABLE As1 1. Explain Dobereiner’s law of triads with suitable triad/examples 2. Write salient features and achievements of Mendeleev’s periodic table. Write limitations of Mendeleev’s periodic table. 3. Write the salient features of Modern periodic table. 4. In group and period how does the following varies i. Valency ii. Atomic radius 5. In group and period how does the following varies i. Ionization energy ii. Electro affinity iii. Electronegativity iv. Electro positivity. 6. Explain the factors that influence ionization energy of an element. 7. Does the size of element and ion are same. Explain with an example. As2 1. What would happen if elements are not classified into groups and periods? 2. Questions to predict the position of the element by giving electron configurations of elements. As4 1. Electronic configuration of an element is 1s22s22p63s23p64s13d5. Answer the following questions. i. Write name of the element. ii. Write name of the period and group to which this element belongs. 2. Read the following table and answer the questions given below the table. period Element (Atomic radius in pm) 2nd period Li (152) Be (111) B (88) C (77) N (74) O (66) F(64) rd 3 period Na (186) Mg (160) Al (143) Si (117) P (110) S (104) Cl (99) i. How does the atomic radius change in period from left to right? ii. Name the most electro positive element. iii. How does 1st ionization energy varies in a period from left to right? iv. Why the Atomic size is changing from left to right in a period.
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8. CHEMICAL BONDING AS1 1. 2. 3. 4. 5.
Explain the formation of an ionic bond by Lewis dot method with an example. Explain the formation of a covalent bond by Lewis dot method with an example. Explain the arrangement of ions in ionic compounds. Write the factors that affect the change of neutral atom into cation or anion. How did VSEPRT theory helped in explain bond angles of covalent bond compounds? Explain with a suitable example. 6. Explain valence bond theory with an example. 7. Explain valence bond theory – hybridization with an example. 8. Explain polar covalent bond with an example.
As2 1. What would have happen if chemical bonding doesn’t take place? As5 1. Draw Lewis dot structures of noble gases. 2. Draw the structure of molecules ask.
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9. ELECTRIC CURRENT AS1. 1. 2. 3. 4. 5. 6. 7. 8. 9.
How does a battery maintain a constant potential difference between its terminals? Give examples for ohmic conductors and non ohmic conductors. Problems based on v, i and R Explain the factors affecting resistance of a material. Problems on resistors connected in series and in parallel. Simple problems on Kirchhoff’s laws. Problems on electric power etc. Explain short circuit. What do you mean by overload? How does it cause damage to electric appliances? How can you prevent damage due to overloading?
As2 1. What would happen if high melting point conductor is used as fuse in household electric circuits instead of low melting point conductors? 2. Do electric bulbs at home and decorative bulbs are connected in the same way? Why? As3 1. Write aim, materials required and experimental procedure to verify Ohm’s law. Mention some precautions to be taken while conducting the experiment. 2. Write aim, materials required and experimental procedure to verify resistant laws (nature of the material, temperature, length and area of cross section of the conductor). Mention some precautions to be taken while conducting the experiment. As4 1. Resistivity of various materials given in the table. Material Silver copper tungsten iron Resistivity 0 (at 20 C) ρ Ω-m
1.59x10
-8
1.68x10
-8
-8
5.60x10
1.00x10
nichro me -7
silicon -6
1.10x10
6.40x10
glass 2
10.0x10
rubber 13
13
1.00x10
Answer the following questions. i. Which of the material is a good conductor of electricity? ii. Why tungsten is used in electric bulbs? iii. Which of the above material is used in IC chips? iv. Which of the above material is used as heating element? Why? 2. Graphs regarding ohm’s law can be given and ask questions related to them. As5 1. Draw a simple circuit using voltmeter, ammeter, battery, connecting wires, switch etc. 2. Draw diagrams to show resistors are connected in i. series ii. Parallel As6 1. Why tungsten is used as filament in electric bubs? 2. Write the uses of fuse in house hold electric circuits 3. Problems based on power consumption.
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10. ELECTROMAGNATISM AS1 1. 2. 3. 4. 5. As2 1. 2. As3 1.
Explain Faraday’s law of electromagnetism. Explain Lenz law Describe working principle of an electric motor. Describe working principle of AC dynamo. Describe working principle of DC dynamo/ generator. What would have happen if magnetic field is not created around current carrying conductor? What would have happen if electric motors are not invented?
Write materials are required to verify Oersted experiment. Describe the experimental procedure. Mention the precautions to be taken. 2. Write materials are required to verify Faraday’s experiment. Describe the experimental procedure. Mention the precautions to be taken. 3. Write materials are required to observe magnetic lines around current carrying straight wire experiment. Describe the experimental procedure. Mention the precautions to be taken. 4. Write materials are required to show force acting on a current carrying wire experiment. Describe the experimental procedure. Mention the precautions to be taken.
As5 1. 2. 3. 4. 5. 6.
Draw the diagram to show magnetic line around current carrying straight wire. Draw simple circuit to verify ohm’s law. Draw diagram to show Lenz law. Draw diagram of electric motor Draw diagram of AC dynamo Draw diagram of DC dynamo
1. 2. 3. 4.
Write applications of electromagnetism. Write the uses of an electric motor Write uses of generator Simple problems
As6
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11. PRINCIPLES OF METALLURGY AS1 1. 2. 3. 4. 5. As2 1. 2. As3 1.
Explain various stages in extraction of metals from ores. Explain various methods of dressing ores. Explain the extraction of high reactive metals. Explain various purification methods in from its ore reefing of the metals. Why do we prevent rusting of iron? Write few methods of prevention of corrosion of metals. What would happen if corrosion of metals is not prevented? Why do we use only gold and silver for making of ornaments? Write materials required to show air and water are needed for rusting of an iron nail. Describe the experimental procedure. Mention the precautions to be taken.
As4 1. Activity 1 in text book As5 1. Diagrams of furnace. 2. Diagrams of concentration of ores
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12. CARBON AND ITS COMPOUNDS As1 1. Explain sp hybridization with an example. 2. Explain sp2 hybridization with an example. 3. Explain sp3 hybridization with an example. 4. Discuss various allotropic forms of carbon. 5. Explain the versatile nature of carbon compound with examples. 6. Classify the carbon compounds based on functional groups. Give examples 7. Give example to homologous series of hydrocarbons. 8. IUPAC nomenclature of carbon compounds 9. Explain the rules followed in IUPAC nomenclature of carbon compound with examples. 10. Explain substitution reactions of alkanes. 11. Explain addition reactions of alkenes and alkynes. 12. Write the method preparation of ethyl alcohol. Mention some of its properties. 13. Write the method preparation of ethanoic acid. Mention some of its properties. 14. Explain the cleansing property of soap. As2 1. What would happen if carbon doesn’t exhibit catenation, isomerism properties? 2. Do alkanes participate in addition reactions? Why? 3. Black suit is emitted when camphor and candle burnt LPG stove doesn’t give. Hypothesize the reasons. As3 1. Write material required to show esterification reaction. Describe the experimental procedure. Mention the precautions to be taken in this experiment. As4 1. General formulae of alkanes/ alkenes/ alkynes/ functional groups given. Questions based on these asked As5 1. Molecular structures of different molecules. As6 1. Write uses of Nano tubes. 2. Write uses of ethanol. 3. Write uses of esters in daily life.
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Slip Test -1 General Science
(Physical Science (1-2 lessons)) English Version
Class: X
1) 2) 3) 4)
Part-A & B Max.Marks:20 Time: 1.25 hrs. Section-I ( 4 x 1 = 4 ) Mention the material required to find the focal length of the concave mirror. Mention any two uses of the spherical mirrors. Calculate the mass of ‘Mg’ to get 400 grams of ‘MgO’ in a combustion reaction/ ( Atomic weight of Mg-24, O-16) Complete the following diagram
Section-II (3x2 = 6 )
5) 6) 7) 8)
Radius of curvature of a concave mirror is 50 Cm. and Image is placed 75 Cm distance from the pole. Find the Object distance. Mention the properties of the image if an object is placed beyond ‘C’ and between ‘P’ and ‘F’. Al + Fe2 O3 → Al2 O3 + Fe. Balance the chemical equation and also write what information does the above diagram gives us. Section-III 4 x 2 = 8 Complete or if any error correct the following ray diagrams.
O
O
I
OR
9. Draw the ray diagrams for the following situations for a concave mirror i. Image size is Same as the object ii. Image is enlarged and real iii. Image is diminished iv. Virtual image 9) Balance the following Chemical equations i. C2H6 + O2 → CO2 + O2 ii. Pb(NO3)2 → PbO + NO2+ O2 iii. Zinc reacts with calcium chloride and forms zinc chloride and calcium iv. LeadOxide+carbon→Lead+carbon-di-oxide. OR
Mention the precaution to be taken in the experiment to find focal length of a concave mirror. And also mention the experimental procedure.
10)
Radius of curvature of concave mirror is 50 Cm .Object is placed 25 Cm from the focus. Then the image
(
characteristics is
)
A) Enlarged B) diminished
C) Virtual D) Same size of the object 11) Following one chemical equation is a balanced equation ( ) A) C+ O2 →2CO2 B) 2S+ O2 →2S2O C) 2Mg+ O2 → Mg2O2 D) 2C+ O2 →2CO 12) Always diminished image formed by A) Plano concave lens B) concave lens C) Convex mirror D) Convex lens 13) Identify the correct ray diagram A)
B)
C)
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D)
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Model Test -2 General Science
(Physical Science (8-12 lessons)) English Version
Class: X
Part-A & B
PART-A
Max.Marks:40
Time: 2.45 hrs.
(35 Marks)
Instructions i. Question paper contains 3 sections ii. Answer all the questions iii. In Section – III internal Choice is there. iv. Time for examinations is 2.45 min. in which 15 min. are meant for reading of the question paper.
Section-I Instructions
7 x 1
i.
Answer all the questions
ii.
Each question carries 1 marks
iii.
Answer should be 2 to 3 sentences.
= 7
1) 2) 3) 4)
Write IUPAC name of 1,2di chloro-cyclo bute-3ene-1 ol Guess the position of the element if its electron configuration is 1s22s2sp 63s23p4? Mention the consequences, if electric motor is not invented? What happens to the magnetic field around current carrying wire if we changed the direction of the current in the wire? 5) List out the materials to verify the faraday law? 6) What are the uses of Nano tubes? 7) Mention the concentration process of the ore?
Section-II Instructions i.Answer
6 x 2
= 12
all the questions
ii.Each question
carries 2 marks
iii.Answer
should be 4 to 5 sentences. 8) Explain the electrolytic refining of crude metal with one example. 9) Suggest some methods of preventing corrosion. 10) Explain the Lenz law with diagram? 11) Draw circuit diagram showing R1, R2and R3 resistors are connected parallel, use ammeter and voltmeter in the circuit. 12) Draw the ethane and acetylene molecules structure. 13) How does soap clean dirt on clothes?
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Section-III Instructions
4 x 4
= 16
i. Answer all the questions ii. Each question carries 4 marks iii. In this section internal choice is there Each question two options are there, In
each question answer for one option only iv. Answer should be 8 to 12 sentences.
14) Explain the working process of electric motor.OR Find the electric current drawn from the battery C I1 5V 2Ω of emf 12V
B I2
I1+I2
D E
I1 +I2
12V
I2
4Ω
A F
15) Explain the formation of following molecules by using the valance bond theory of hybridization i. BF3 ii. BeCl2 OR Write the structure of the following carbon compounds IUPAC Names. i. CH2=CH 2-CHCl-CH-CH-CH2OH ii. CH2=CH 2-CHCl-CH-CH-CHOH-C≡CCl iii. CH2=CH 2-CHCl-CH-CH=CH2 iv. CH3-CH2-CHCl-CH-CH-CH2Br 16) List out the material to Ohms law and describe the experimental procedure. OR List out the material to show esterification reaction and also describe an experimental procedure 17) Read the following table. Answer the questions. Material Resistivity in PΩ-m at 200C
a) b) c) d)
Silver
Copper -
1.59 X 10 8
1.68 X 10-
8
Tungsten
Iron
Nicrome
8
1.00 X 7 10-
1.10 X 10-
5.60 X 10-
6
Silicon 6.40 X 10
2
glass
rubber
10.0 X 10 10
1.00 X 1013
Which of the above material is a good conductor? Why temperature is mentioned in the table? Which one is a alloy among the given material? Which material is as an insulator? Support your answer.
OR Read the following table. Answer the questions. Element (Atomic radius in pm) Period 2nd Period 1st period
a) b) c) d)
Li ( 152)
Be (111)
B ( 88)
C (77)
N (74)
O (66)
F(64)
Na ( 186)
Mg (160)
Al (142 )
Si (117)
P (110)
S (104)
Cl (99)
How does atomic radius change in a period from left to right? Which element has highest electropositive from the above? Discuss the variation of 1st ionization energy in a period from left to right. Why do you think that atomic radius vary a period from left to right?
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Model Test -2 General Science
(Physical Science (8-12 lessons)) English Version
Class: X
Max.Marks:40
Time: 2.45 hrs.
PART- B Instructions i.Answer
10 x 1/2 = 5
all the questions
ii.
Each question carries 1/2 marks
iii.
In this section there are 4 options ( A/B/C/D )to each question. Choose the appropriate answer and write the answer in the brackets given against the question .
iv.
This part –B must attach to the answer book let of part-A
1) Commonly used safety fuse wire is made of ( ) B) An alloy of tin and lead B) Nichrome C) Lead D) Copper 2) The resistors 12Ω and 24 Ω are connected in the circuit, least total resistance is ( ) A) 12Ω B) 4 Ω C) 6Ω D) 8 Ω 3) If 1 A of current flows through a conductor , the charge that flows in two minute is A) 60 C B) 120 C C) 2 C D) 1C rd 4) Number of elements in 3 period of a long form periodic table A) 18 B) 2 C) 4 D) 8 5) The metal that occurs in the native form is A) Na B) Mg C) Au D) Sb 6) Working principle of dynamo is ( ) A) Electric energy to mechanical energy B) Electromagnetic induction C) Mechanical energy to electrical energy D) electric shock 7) Atomic number of an element is 19, The electronic configuration is 1s22s22p63s23p64s1 Then the valence of the element is A) 2 B) 3 C) 4 D) 1 8) Half filled or full filled orbitals are stable. The valance electronic configuration of Cu (z=29) ( ) 1 10 2 9 1 5 5 3 1 10 A) [Ar]4s 3d B) [Ar]4s d C) [Ar]4s 3p 3d D) [Ar] 3p 4s 3d 9) Sulphide ores generally concentrated by A) Leaching B) froth flotation C) roasting D) combustion 10) The compound C2H 5COOC2H5 is a A) Alcohol B)Either C) Ester D) carboxylic acid
SSC-Phy.Sci. Lesson Wise & Academic standard wise model questions –T.Srinivasa chary -9949502090 –Medchal Dist.
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