MyQuestionIcon

1

You visited us 1 times! Enjoying our articles? Unlock Full Access!

Covalent Bond

The aqueous s...

Question

The aqueous solution of inorganic compound $(X)$ yielded a white precipitate when treated with dilute $H N O_{3}$ and $A g N O_{3}$ . Another sample of the solution of $(X)$ when treated with $N a O H$ gave a white precipitate first which dissolved in excess of $N a O H$ yielding a colorless solution. When $H_{2} S$ gas was passed through that solution a white precipitate was obtained.

Identify the compound $(X)$ and give the reactions.

A

Z n C l_{2}

Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses

B

A l C l_{3}

No worries! We‘ve got your back. Try BYJU‘S free classes today!

C

B a C l_{2}

No worries! We‘ve got your back. Try BYJU‘S free classes today!

D

N a C l

No worries! We‘ve got your back. Try BYJU‘S free classes today!

Open in App

Solution

The correct option is A $Z n C l_{2}$

Upon reaction with dil $H N O_{3}$ and $A g N O_{3}$ , X yielded a white precipitate. This indicates the presence of Chloride ion in X (see the reaction (i)).

When X was treated with NaOH, it gave a white precipitate. Since hydroxides of Na and Ba are soluble they won't form a precipitate, indicating C and D as wrong options. Whereas, hydroxides of both Zn and Al form a white precipitate, which dissolved in excess of NaOH yielding a colourless solution (see reactions (ii)).

On treatment with $H_{2} S$ , a white precipitate was obtained. This indicates the presence of Zn ion in X (see the reaction

(iii)). Thus the answer is option A, ZnCl $_{2}$ .

Hence, the correct option is $A$

Suggest Corrections

thumbs-up

0

Similar questions

Q. The aqueous solution of an inorganic compound (X) gives white precipitate with

N H_{4} O H

which does not dissolve in excess of

N H_{4} O H

This aqueous solution also gives white precipitate with

A g N O_{3}

and the precipitate is soluble in dilute

H N O_{3}

. Here, (X) is :

Q. Identify the inorganic salt

A

whose aqueous solution gives following reactions.
(i) pale yellow precipitate with

A g N O_{3}

solution, insoluble in dil

H N O_{3}

(ii) white precipitate with

N H_{4} O H

N a O H

solution. However the precipitate does not dissolve in excess of

N H_{4} O H

but soluble in excess of

N a O H

.

An aqueous solution of a mixture of two inorganic salts, when treated with dilute

H C l

, gave a precipitate (P) and filtrate (Q). The precipitate P was found to dissolve in hot water.

The filtrate (Q) remained unchanged, when treated with

H_{2} S

in dilute mineral acid medium. However, it gave a precipitate (R) with

H_{2} S

in an ammoniacal medium. The precipitate R gave a coloured solution (S ), when treated with

H_{2} O_{2}

in an aqueous NaOH medium.

The coloured solution S contains:

Q. An acidic solution of ‘X’ does not give precipitate on passing

H_{2} S

gas. ‘X’ gives a white precipitate when

N H_{4} O H

is added to it. The white precipitate dissolves in excess of

N a O H

solution. Pure ‘X’ fumes in air and dense white fumes are obtained when a glass rod dipped in

N H_{4} O H

is held in the fumes. The compound ‘X’ is:

An aqueous solution of a mixture of two inorganic salts, when treated with dilute HCl, gave a precipitate (P) and a filtrate (Q). The precipitate (P) was found to dissolve in hot water. The filtrate (Q) remained unchanged when treated with $H_{2} S$ in a dilute mineral acid medium. However, it gave a precipitate (R) with $H_{2} S$ in an ammoniacal medium. The precipitate R gave a coloured solution (S) when treated with $H_{2} O_{2}$ in an aqueous NaOH medium.

The precipitate P contains

View More

Join BYJU'S Learning Program

similar_icon

Related Videos

lock

Introduction to Chemical Bonding

CHEMISTRY

Watch in App

explore_more_icon

Explore more

Standard X Chemistry

Join BYJU'S Learning Program

CrossIcon