Hydrides of N...

Hydrides of Nitrogen

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Q. There are some deposits of nitrates and phosphates in earth's crust. Nitrates are more soluble in water. Nitrates are difficult to reduce under the laboratory conditions but microbes do it easily. Ammonia forms large number of complexes with transition metal ions. Hybridisation easily explains the case of sigma donation capability of

N H_{3}

and

P H_{3}

. Phosphine is a flammable gas and is prepared from white phosphorus.

Among the following, the correct statement is

Between $N H_{3}$ and $P H_{3}, N H_{3}$ is a better electron donor because the lone pair of electrons occupies spherical 's' orbital and is less directional
Between $N H_{3}$ and $P H_{3}, N H_{3}$ is a better electron donor because the lone pair of electrons occupies $s p^{3}$ -orbital and is more directional
Between $N H_{3}$ and $P H_{3}, N H_{3}$ is a better electron donor because the lone pair of electrons occupies $s p^{3}$ -orbital and is more directional
Between $N H_{3}$ and $P H_{3}, N H_{3}$ is a better electron donor because the lone pair of electrons occupies spherical 's' orbital and is less directional

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N H_{3}

and

P H_{3}

. Phosphine is a flammable gas and is prepared from white phosphorus.

Among the following, the correct statement is

Between $N H_{3}$ and $P H_{3}, N H_{3}$ is a better electron donor because the lone pair of electrons occupies spherical 's' orbital and is less directional
Between $N H_{3}$ and $P H_{3}, N H_{3}$ is a better electron donor because the lone pair of electrons occupies $s p^{3}$ -orbital and is more directional
Between $N H_{3}$ and $P H_{3}, N H_{3}$ is a better electron donor because the lone pair of electrons occupies $s p^{3}$ -orbital and is more directional
Between $N H_{3}$ and $P H_{3}, N H_{3}$ is a better electron donor because the lone pair of electrons occupies spherical 's' orbital and is less directional

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Q. Which of the following ammonium salts give(s) nitrogen on heating?

$(N H_{4})_{2} S O_{4}$
$N H_{4} N O_{2}$
$(N H_{4})_{2} (C O_{3})$
$(N H_{4})_{2} C r_{2} O_{7}$

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Q. Which of the following reactions is/are correct when

C l_{2}

reacts with

N H_{3}

$N H_{3} + C l_{2} \to N C l_{3} + H C l$
$E x c e s s$
$N H_{3} + C l_{2} \to N_{2} + N H_{4} C l$
$E x c e s s$
$N H_{3} + C l_{2} \to N_{2} + N H_{4} C l$
$E x c e s s$
$N H_{3} + C l_{2} \to N C l_{3} + H C l$
$E x c e s s$

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Q. Excess of

C l_{2}

reacts with ammonia to form:

$N H_{3}$ and $N_{2}$
$N C l_{3}$ and $H C l$
$N C l_{3}$ and $N_{2}$
$N H_{4} C l$ and $N_{2}$

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Q. When ammonium perchlorate is heated below

300^{o} C

, which of the following gases are produced?

$N_{2} O$
$C l_{2}$
$N O C l$
$O_{2}$

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Q. When excess of ammonia reacts with bleach, it can form:

$N O$
$N H_{4} C l$
$N_{2} H_{4}$
$H N O_{2}$

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Q. What are the major products when ammonia reacts with an excess of chlorine?

$H N O_{3}$ and $H C l$
$N_{2}$ and $H C l$
$H N O_{2}$ and $H C l$
$N C l_{3}$ and $H C l$

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Q. The ammonia prepared by treating ammonium sulphate with calcium hydroxide is completely used by

N i C l_{2} . 6 H_{2} O

to form a stable coordination compound. Assume that both the reactions are 100% complete. If 1584 g of ammonium sulphate and 952 g of

N i C l_{2} .6 H_{2} O

are used in the preparation, the combined weight (in grams) of gypsum and the nickel-ammonia coordination compound thus produced is .
(Atomic weights in g

m o l^{- 1}

H

= 1,

N

= 14,

O

= 16,

S

= 32,

C l

= 35.5,

C a

= 40,

N i

= 59)

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Q. When excess of

C l_{2}

reacts with ammonia, the products formed are:

$N H_{3} a n d N_{2}$
$N C l_{3} a n d H C l$
$N C l_{3} a n d N_{2}$
$N H_{4} C l a n d N_{2}$

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