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#### Term II Model Question Paper

11th Standard

Reg.No. :
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Chemistry

Time : 02:30:00 Hrs
Total Marks : 70
15 x 1 = 15
1. Carbon forms two oxides, namely carbon monoxide and carbon dioxide. The equivalent mass of which element remains constant?

(a)

Carbon

(b)

Oxygen

(c)

Both carbon and oxygen

(d)

Neither carbon nor oxygen

2. Splitting of spectral lines in an electric field is called

(a)

Zeeman effect

(b)

Shielding effect

(c)

Compton effect

(d)

Stark effect

3. What would be the IUPAC name for an element with atomic number 222?

(a)

bibibiium

(b)

bididium

(c)

didibium

(d)

bibibium

4. Ionic hydrides are formed by

(a)

halogens

(b)

chalogens

(c)

inert gases

(d)

group one elements

5. Zeolite used to soften hardness of water is hydrated

(a)

Sodium aluminium silicate

(b)

Calcium aluminium silicate

(c)

Zinc aluminium borate

(d)

Lithium aluminium hydride

6. Water is a

(a)

basic oxide

(b)

acidic oxide

(c)

amphoteric oxide

(d)

none of these

7. sodium is stored in

(a)

alcohol

(b)

water

(c)

kerosene

(d)

none of these

8. The temperatures at which real gases obey the ideal gas laws over a wide range of pressure is called

(a)

Critical temperature

(b)

Boyle temperature

(c)

Inversion temperature

(d)

Reduced temperature

9. In a closed room of 1000 m3 a perfume bottle is opened up. The room develops smell. This is due to which property of gases

(a)

Viscosity

(b)

Density

(c)

Diffusion

(d)

None

10. In an adiabatic expansion of an ideal gas

(a)

w=-ΔU

(b)

w=ΔU+ΔH

(c)

ΔU=O

(d)

w = 0

11. In an organic compound, phosphorus is estimated as

(a)

Mg2P2O7

(b)

Mg3(PO4)2

(c)

H3PO4

(d)

P2O5

12. What is the hybridisation state of benzyl carbonium ion?

(a)

sp2

(b)

spd2

(c)

sp3

(d)

sp2d

13. Which of the following species does not acts as a nucleophile?

(a)

ROH

(b)

ROR

(c)

PCl3

(d)

BF3

14. An alkyl bromide (A) reacts with sodium in ether to form 4, 5– diethyloctane, the compound (A) is

(a)

CH3 (CH2)3 Br

(b)

CH3(CH2)5 Br

(c)

CH3(CH2)3 CH(Br)CH3

(d)

${ CH }_{ 3 }-{ \left( { CH }_{ 2 } \right) }_{ 3 }-CH\left( Br \right) -\underset { \overset { { | } }{ { CH }_{ 3 } } }{ { CH }_{ 3 } }$

15. Which of the following can be used as the halide component for friedal - crafts reaction?

(a)

Chloro benzene

(b)

Bromo benzene

(c)

chloro ethene

(d)

isopropyl chloride

16. 6 x 2 = 12
17. Define equivalent mass

18. How many orbitals are possible for n =4?

19. Define electro negativity.

20. Distinguish between diffusion and effusion.

21. State the first law of thermodynamics.

22. What is dipole moment?

23. 6 x 3 = 18
24. Why halogens act as oxidising agents?

25. Mention the uses of plaster of paris

26. State Boyle's law.

27. What are state and path functions? Give two examples

28. The value of Kc for the reaction

29. Write structural formula for the following compounds
(i) Cyclohexa-1, 4-diene
(ii) Ethynyl cyclohexane.

30. 5 x 5 = 25
31. Explain the diagonal relationship.

32. Explain preparation of hydrogen using electrolysis.

33. Give the uses of gypsum

34. List the characteristics of internal energy.

35. Give IUPAC names for the following compounds
1) CH3 – CH = CH – CH = CH – C ≡ C – CH3
2)
3) (CH3)3 C – C ≡ C – CH (CH3)2
4) ethyl isopropyl acetylene
5) CH ≡ C – C ≡ C – C ≡ CH