9.1 Ammonia — Chemistry STD 10 — Question

Pure water consists entirely of ________

Aluminium is an important constituent metal duralumin since it is ________. [a good conductor of heat/light in weight/unacted by acids]

Molecular weight of a gas is twice its __________.

Esterification is the reaction between carboxylic acid and ______ in presence of ____ .

Generally ionic compounds exist in ______ (solid, liquid, gas) state.

Sulphuric acid is a. _______ acid.

The general formula for aldehyde homologous series is ________ [R-CHO/R-COOH] where R represents ________ .[alkyl radical/functional radical].

There are ______ groups and ______ periods in the modern form of periodic table.

Addition of Tin to _______ lowers the melting point of alloy solder.

Each period except period 1 in the periodic table begins with __________ and ends up with a __________.