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p - Block Elements - I Model Question Paper 1

12th Standard EM

Reg.No. :
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Chemistry

Time : 01:00:00 Hrs
Total Marks : 50
5 x 1 = 5
1. The element that does not show catenation among the following p-block elements is

(a)

Carbon

(b)

silicon

(c)

Lead

(d)

germanium

2. Carbon atoms in fullerene with formula C60 have

(a)

sp3 hybridised

(b)

sp hybridised

(c)

sp2 hybridised

(d)

partially sp2 and partially sp3 hybridised

3. The basic structural unit of silicates is (NEET)

(a)

$\left( SiO_{ 3 } \right) ^{ 2- }$

(b)

$\left( SiO_{ 4 } \right) ^{ 2- }$

(c)

$\left( Sio \right) ^{ - }$

(d)

$\left( SiO_{ 4 } \right) ^{ 4- }$

4. Chemical formula of phosgene is

(a)

COCl2

(b)

CaOCl2

(c)

CaCO3

(d)

COCI

5. SiO44- ion has ____ geometry.

(a)

Triangular

(b)

Tetrahedral

(c)

Linear

(d)

Pentagonal bipyramidal

6. 5 x 2 = 10
7. Give the uses of Borax

8. What is catenation ? describe briefly the catenation property of carbon

9. Give the structure of CO and CO2.

10. Mention the physical properties of boranes.

11. Give the uses of alum.

12. 5 x 3 = 15
13. AlCl3 behaves like a lewis acid. Substantiate this statement.

14. Write a short note on hydroboration

15. Write a note on metallic nature of p-block elements

16. Describe the structure of fullerenes.

17. Describe the structure of graphene.

18. 4 x 5 = 20
19. Write a note on zeolites.

20. CO is a reducing agent . justify with an example.

21. What are the various methods by which carbon-di-oxide is prepared?

22. Distinguish between diamond and graphite.