Carbon and its Compounds — Science STD 10 — Question

The aqueous solution of an ionic compound conducts electricity because there are plenty of free electrons in the solution.

NO₂ is acidic oxide. [True/ False]

Rancidity can be slowed down by storing foods away from light. [True/ False]

State whether the following statement is true or false:
Copper sulphate crystals are always wet due to the presence of water of crystallisation in them.

All the non-metals which are above hydrogen in the activity series, displaces hydrogen from dilute acids. [True/ False]

State whether the following statement is true or false:
A chemical equation can be balanced easily by altering the formula of a reactant or product.

State whether the following statement is true or false:
The minimum number of carbon atoms in a ketone molecule is two.

All non-metallic oxides dissolve in water to form acids. [True/ False]

Ethanol turns blue litmus red. [True/ False]

Non-metals react with dilute acids to produce a gas which burns with a ‘pop’ sound.