MAHASANKALPAM: CHITTOOR DISTRICT SANKALPAM -2

PHYSICAL SCIENCE (SET-1)

TIME: 1Hr

Marks: 25

I.Choose the Correct Answer Each Question carries of Mark ½ x 6= 3M 1. Writing the electron Configuration of chrominum and copper are exempted because i) Elements which have half filled orbitals have greater stability. ( ) ii) Elements which have completely filled orbitals have greater stability. iii) To attain stability electrons in 4S and 3d redistribute their energies. a) i Is only correct b) ii Only Correct c) i and ii are correct d) i,ii,iii are correct. 2. The valency of Alkali Mental family is ( ) a) 1 b) 2 c) 3 d) 4 3. ‘K J/mol is units for ( ) a) Atomic radius b) Ionisation energy c) Electro negativity d) Electro positivity 4. Which type of hybridization has 50% S-orbital and 50% of ‘P’ Orbital? ( ) a) SP b) SP2 c) SP d) None 5. The Electron configuration of Na + is ( ) 2 2 6 1 2 2 6 a. 1S 2S 2P 3S c.1S 2S 2P b. 1S2 2S2 2P6 3S2 d. 1S2 2S2 2P5 6. The Four Quantum numbers n = 1; l = 0; ml = 0 Ms = ½ or ½ are represent the Orbital a) 1S1 b) 2P1 c) 2S1 d) 2S2 ( ) II.Answer all Questions, Each Question carries 1 Mark 1 x 4= 4M 7. Write the shape and maximum number of Electrons that can be accommodated in ‘d’ subshell? 8. On the basis of Atomic numbers predict to which block the elements with atomic numbers 5,9,14,18? 9. What are the Inert gases? Write General electronic configuration of Noble gases? 10. Electron configuration of an atom is 2,8,7 to which of the element would be chemically, similar? III.Answer all Questions, Each Question carries 2 Marks 2 x 5= 10M 11. Make some questions to understand the differences between orbit and orbital? 12. Draw the Diagram of N2 Molecule using valance bond theory”. 13. Using the table answer the following Questions. Bond Bond Length (Ao) Bond Energy (KJ /Mol) H -H 0.74 436 Br – Br

2.28

193

i.

What is the Units for Bond Length?

ii.

Write the formula of the molecule which has contain Bond Energy 193 KJ /Mol?

14. How does help Hybridisation process to explain the formation of BeCl2 Molecule ? 15. Why the substances like Sodium chloride andMagnesium chlorides are good electrolyte? Explain? IV. Answer all Questions, Each Question carries 4 Marks 4 x 2= 8M 16. Which range of wave length is sensitive to our Eyes ?Draw the diagram of “Electromagnetic Spectrum and label all wave ranges in it? 17. Kavya, Harshitha and Bhargavi are the favorites of Dauberneer, New Lands and Mendaleaf sequently. They are discussing about their favourite scientists for contribute to classification of elements to be used in the periodic table.Write some sentences about each scientist what they discussed ?

MAHASANKALPAM: CHITTOOR DISTRICT SANKALPAM -2

PHYSICAL SCIENCE (SET-2)

TIME: 1Hr

Marks: 25

I.Choose the Correct Answer Each Question carries of Mark ½ x 6= 3M 1. Match the following and choose the correct answer ( ) i. S-Orbital a) Dumbell. ii. P- Orbital b) Double Dumbell iii.d-orbital c) Spherical a. i-a ;ii –b; iii- c b)i-b ; ii-a; iii-c c) i –c ; ii-a; iii-b d) None of the above 2. Which of the following shells has less energy ( ) a. K b. L c. M d. N 3. Which of the following is the most active metal? a. Lithium b. Sodium c. Potassium d. Rubidium 4. The units for Ionization Energy is ( ) a. Erg b. KJ c. KJ/mo1 d. Moles 5. Who proposed the Ionic bond ( ) a. Kossel b. GN Lewis c. Sidzuick d. None 6. The valency of Chlorine is ( ) a. 0 b. 1 c. 2 d. 3 II.Answer all Questions, Each Question carries 1 Mark 1 x 4= 4M 7. Explain about nlx method ? 8. Is Lanthanoids elements strarts from 90Th to 103Lr ?if no write the correct answer. 9. How is Hcl molecule formed? 10. What are the characteristics of Electro magnetic waves ? III.Answer all Questions, Each Question carries 2 Mark s 2 x 5= 10M 11. An element has atomic number 20 where would you expect this element in the periodic table and why?

12. Represent the Molecule H2O using Lewis notation. 13. Draw the shapes of ‘p’ Orbital? 14. Why the Ionic Compounds are good Electrolytes? 15. Make some questions on General rules to predict electronic configuration? IV. Answer all Questions, Each Question carries 4 Marks 4 x 2= 8M 16. Correct and rewrite the following table Periodic Properties a. Atomic radius b. Ionization Energy

IN GROUPS Increased Decreased

IN PERIODS Decreased Increased

c. d. e. f. g.

Increased Increased Decreased Increased Increased

Increased Decreased Increased Decreased Increased

Decreased

Decreased

Electron Possetively Electro Possitively Electro negatively Oxidation Reduction

h. Metalic Properly

17. What is hybridization? Explain the formation of the BeCl2 molecule using hybridization.

spell 2 PS set 1 & 2 EM.pdf

Explain about nlx method ? 8. Is Lanthanoids elements strarts from 90Th to 103Lr ?if no write the correct answer. 9. How is Hcl molecule formed? 10. What are the characteristics of Electro magnetic waves ? III.Answer all Questions, Each Question carries 2 Mark s 2 x 5= 10M. 11. An element has atomic number 20 where ...

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