Chemical Bonding — Chemistry STD 10 — Question

The higher the electron affinity of a non-metal,__________ chemically reactive the non-metal is.

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

When conc. sulphuric acid is boiled with nitre, the colour of the gas evolved is ________ . [yellowish brown/pale green]

The metal plate through which ____________ leaves from an electrolyte is called ____________ .It has ______________ of electrons.

Correct the following:
Finely divided platinum is used in Haber process

Ethyne is prepared by the action of_______ on _______ .

Methane can be prepared by heating _______ with solid _______ .

Elements in a period, all have the same number of __________ in their atoms.

Sulphuric acid absorbs sulphur trioxide and forms. _______ .

Fill in the blanks:
Usually …………. (sulphide/carbonate) ores are subjected to ……………. (calcination/roasting) which is done in the absence of air.