p-Block Elements - 03 (Nitrogen Family)

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Q1. PCl5 is possible but NCl5 does not exist *

1 point

It does not like Cl

Ionization energy of N is very high

In N, d-sub-shell is absent

None of these

Q2. Maximum covalency of nitrogen is __________ *

1 point

Q3. In Haber’s process for the manufacture of NH3 *

1 point

finely divided iron is used as a catalyst

finely divided nickel is used as a catalyst

finely divided molybdenum is used as a catalyst

no catalyst is necessary

Q4. Ammonia on reaction with hypochlorite anion can form *

1 point

N2O5

None

N2H4

Q5. NH3 gas is dried over *

1 point

P2O5

CuSO4

CaO

HNO3

Q6. The shape of ammonia molecule is *

1 point

planar triangle

tetrahedral

pyramidal

octahedral

Q7. When ammonia is heated with cupric oxide, a molecule of ammonia will 3CuO + 2NH3 = 3Cu + 3H2O + N2 *

1 point

lose 3 electrons

gain 3 electrons

gain 2 electrons

lose 2 electrons

Q8. In which the NH3 is not used ? *

1 point

None of these

Manufacture of rayon and plastic

Cold storage

Anaesthetic

Q9. Liquid ammonia bottles are opened after cooling them in ice for sometime. It is because liquid NH3 *

1 point

Brings tears to the eyes

Is a corrosive liquid

Is a mild explosive

Has a high vapour pressure

Q10. Nitrogen dioxide cannot be obtained by heating *

1 point

AgNO3

Pb(NO3)2

Cu(NO3)2

KNO3

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