MyQuestionIcon

1

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

Borax

iIts aqueous ...

Question

$(i)$ Its aqueous solution is alkaline to litmus.
$(i i)$ It swells up to glassy material $Y$ on strong heating.
$(i i i)$ When the concentrated solution of sulphuric acid is added to a hot solution of $X$ .white crystal of an acid $Z$ separates out.

The Compound $Y$ is :

A

sodium borate & boric oxide

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

B

flower of sulphur

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

C

bleaching powder

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

D

none of these

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

Open in App

Solution

The correct option is B sodium borate & boric oxide
When heated borax undergoes various transitions it first loses water molecules and swells. Then resulting in the formation of glassy material.

$N a_{2} B_{4} O_{7} .10 H_{2} O △ - ---- \to N a_{2} B_{4} O_{7} △ - ---- \to 2 N a B O_{2} s o d i u m m e t a b o r a t e + B_{2} O_{3} b o r i c o x i d e$

Sodium metaborate and boric oxide form the glassy material.
Y is sodium metaborate and boric oxide.

Suggest Corrections

thumbs-up

0

Similar questions

Q. Aqueous solution of a salt

(Y)

is alkaline to litmus. On strong heating, it swells-up to give a glassy material. When

c o n c . H_{2} S O_{4}

is added to a hot concentrated solution of

(Y)

, white crystals of a weak acid separate out. Hence, the compound

(Y)

Q. A certain salt (X) gives the following tests :
(i) Its aqueous solution is alkaline to litmus
(ii) On strongly heating it swells to give a glassy material.
(iii) When concentrated sulphuric acid is added to a hot concentrated solution of (X) , white crystals of a weak acid separate out
Write equations for all the above reactions and identify X, Y, Z.

Q. A certain salt

X

, gives the following results.

(i) Its aqueous solution is alkaline to litmus.

(ii) It swells up to a glassy material

Y

on strong heating.

(iii) When conc.

H_{2} S O_{4}

is added to a hot solution of

X

, white crystal of an acid

Z

Write equations for all the above reactions and identify

X, Y

Z

Q. A certain salt

X

gives the following test :
(i) Its aqueous solution is alkaline to litmus.
(ii) On strongly heating, it swells to give glassy bead.
(iii) When concentrated

H_{2} {S O}_{4}

is added to a solution of

X

white crystals of a weak acid. separate out.

X

and write down all reaction.

What would you observe in the following cases?
(i) Sulphur trioxide is dissolved in water on a large scale.
(ii) Concentrated sulphuric acid is added to equal volumes of cold water.
(iii) 100 ml of 98% sulphuric acid is kept open.
(iv) Hot concentrated sulphuric acid is added to sodium chloride crystals.
(v) Dilute sulphuric acid is added to ferrous sulphate solution.

View More

Join BYJU'S Learning Program

similar_icon

Related Videos

lock

Borax

CHEMISTRY

Watch in App

explore_more_icon

Explore more

Standard XII Chemistry

Join BYJU'S Learning Program

CrossIcon