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Standard XII

Chemistry

Hydrides of Nitrogen

All of the fo...

Question

All of the following statements about ammonia, ${N H}_{3}$ are true except :

it has a characteristic odor

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it is a liquid at room temperature

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it is readily soluble in water

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its aqueous solution has a

p H

above

7

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it reacts readily with acids

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Solution

The correct option is B it is a liquid at room temperature
Ammonia is a gas at room temperature.
It has a stong, pungent choking smell.
It is highly soluble in water.

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Similar questions

Mr. William isolated two complexes and in Chemical Abstract, he reported
"A metal complex having composition

C r (N H_{3})_{4} C l_{2} B r

has been isolated in two forms (A) and (B). The form (A) reacts with

A g N O_{3}

to give a white precipitate readily soluble in dilute aqueous ammonia, whereas (B) gives a pale yellow precipitate soluble in concentrated ammonia.

Read the above report from Chemical Abstract and answer the questions at the end of it.

Cr atom is ________ hybridised.

Q. A metal complex having composition Cr(NH

_{3}

)

_{4}

_{2}

Br has been isolated in two forms A and B. The form A reacts with

A g N O

_{3}

to give a white precipitate readily soluble in dilute aqueous ammonia, whereas B gives a pale-yellow precipitate soluble in concentrated ammonia.The magnetic moments (spin- only value) of A and B are respectively:

Q. A metal complex having composition

C r (N H_{3})_{4} C l_{2} B r

has been isolated in two forms

(A)

and

(B)

. The form

(A)

reacts with

A g N O_{3}

to give a white precipitate readily soluble in dilute aqueous ammonia, whereas

(B)

gives a pale yellow precipitate soluble in concentrated ammonia. Write the formula of

(A)

and

(B)

and state the hybridization of chromium in each. Calculate their magnetic moments (spin- only value).

Q. When a strong acid reacts with a strong base, a/an salt is formed which has a pH of in its aqueous solution.

Q. A highly reactive element

X

is stored under water. It readily reacts with the oxygen in air to give a compound

Y

which dissolves in water. The aqueous solution of

Y

changes a blue litmus solution to red. The element

X

is:

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All of the following statements about ammonia, NH3 are true except :

The correct option is B it is a liquid at room temperatureAmmonia is a gas at room temperature.It has a stong, pungent choking smell.It is highly soluble in water.

All of the following statements about ammonia, ${N H}_{3}$ are true except :

The correct option is B it is a liquid at room temperature
Ammonia is a gas at room temperature.
It has a stong, pungent choking smell.
It is highly soluble in water.