Select correct statement(s) :

Engineering

Chemistry

Alkali Metals and Properties

Compounds of Alkali Metals

Hardness of Water

Question

Select correct statement(s) :

Peroxo disulphate can be used to prepare deuterium peroxide.

Permanent hardness of water can be removed using Clark's method as well as Calgon's method.

The carbonate of Lithium & Magnesium decomposes on heating they form oxide & CO₂.

Sodium carbonate and potassium carbonate both can be prepared by solvay process.

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(A) Potassium carbonate can not be prepared by solvay process

(B) Temporary hardness – Clark's method

Permanent hardness – Calgon's method

(Peroxodisulphate) (Deuterium peroxide)

(D ${Li}_{2} {CO}_{3} \overset{Δ}{\to} {Li}_{2} O + {CO}_{2}$

${MgCO}_{3} \overset{Δ}{\to} MgO + {CO}_{2}$