The relative molecular mass of a substance is expressed in
grams
kilograms
mole
kilo joules
The reactions in which heat is evolved is
exothermic
endothermic
displacement
combination
Burning of a chemical substance in presence of oxygen is
reduction
combustion
redox reaction
One mole of gas occupies a volume of
22 litres
44 litres
22.4 litres
22.4 kilo litres
The reactions which take place only with the absorption of electrical energy are called
electrochemical reactions
chemical combination
ionization reaction
Law of combining volumes was proposed by
Avogadro
Einstein
Gaylussac
Berzelius
"Equal volumes of all gases contain equal number of atoms under similar conditions of temperature and pressure" This was proposed by
A chemical equation in which number of atoms of each element is same on both the sides of a chemical reaction is
balanced equation
chemical formula
symbol
equation
A substance decompose into simpler substance by the passage of electric current is
oxidation
electrolysis
The reactions in which heat is absorbed is