Electrolysis — Chemistry STD 10 — Question

Ethene reacts with chlorine to give _______ the molecular formula of which is _______ .

When sodium acetate is heated with sodalime, ________ gas is evolved.[methane/ethane]

During atmospheric lightning the vapour of ________ are formed. [nitric acid/sulphuric acid]

On moving from left to right in a given period, the number of shells __________.

An example of a salt which produces neutral solution on hydrolysis is ________. [sodium acetate/sodium carbonate/sodium chloride]

Fill in the blanks:
Froath floatation process is generally used to concentrate ………… ores (sulphide/carbonate).

Lead nitrate on strong heating decomposes to form lead oxide which is ________ [reddish brown /yellow] when hot and ________ [white/yellow] when cold.

The energy required to remove on electron from a natural isolated gaseous atom and convert it into a positively charged gaseous ion is called ____________ (electron affinity, ionization potential)

Vinegar contains __________ acid.