Answer
the following questions:
1. What is inert pair
effect?
2. Chalcogens belongs to
p-block. Give reason.
3. Explain why fluorine
always exhibit an oxidation state of -1?
4. Give the oxidation state
of halogen in the following.
a) OF2 b) O2F2
c) Cl2O3 d) I2O4
5.
What are interhalogen compounds? Give examples.
6. Why fluorine is more
reactive than other halogens?
7. Give the uses of helium.
8. What is the
hybridisation of iodine in IF7? Give its structure.
9. Give the balanced
equation for the reaction between chlorine with cold NaOH and hot NaOH.
10. How will you prepare
chlorine in the laboratory?
11. Give the uses of
sulphuric acid.
12.
Give a reason to support that sulphuric acid is a dehydrating
agent.
13. Write the reason for the
anamolous behaviour of Nitrogen.
14. Write the molecular
formula and structural formula for the following molecules.
a) Nitric acid
b) dinitrogen pentoxide
c) phosphoric acid
d) phosphine
15. Give the uses of argon.
16. Write the valence shell
electronic configuration of group-15 elements.
17. Give two equations to
illustrate the chemical behaviour of phosphine.
18. Give a reaction between
nitric acid and a basic oxide.
19. What happens when PCl5
is heated?
20. Suggest a reason why HF
is a weak acid, whereas binary acids of the all other halogens are strong
acids.
21. Deduce the oxidation
number of oxygen in hypofluorous acid – HOF.
22. What type of
hybridisation occur in
a) BrF5 b)
BrF3
23.
Complete the following reactions.
1.
NaCl + MnO2 + H2SO4 →
2.
NaNO2 + HCl →
2.
IO3− + I− + H+ →
3.
I2 + S2O32− →
4.
P4 + NaOH + H2O →
5.
AgNO3 + PH3 →
6.
Mg + HNO3 →
7.
KClO3 →Δ hot conc.
8.
Cu + H2 SO4→
9.
Sb + Cl2 →
10. HBr + H2SO4
→
11. XeF6 + H2O→
12. XeO64− + Mn2+ + H+
→
13. XeOF4 + SiO2
→
14. Xe + F2
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