Chemistry MCQS with Answers for NTS
One mole of a gas refers to
The number of molecules in 22.4 liters of a gas at S.T.P.
The number of molecules in one gram of gas
The number of molecules contained in 12 grams of 12C isotope
The number of molecules in one litre of gas
Which of the following statement is correct if the intermolecular forces in liquids A, B and C are in the order A < B < C?
B evaporates less readily than C
B evaporates more readily than A
A and B evaporates at the same rate
A evaporates more readily than C
An exothermic reaction is one in which the reacting substances
Have the same energy as the products
Have less energy than the products
Have more energy than the products
Are at a higher temperature than the products
Hydrogen chloride molecule contains
Co-ordinate bond
Double bond
Electrovalent bond
Covalent bond
Which one of the following elements occurs free in nature?
P
N
Sb
As
Natural fertilizer from plants and animals provide nitrogen
3.0 kg
1.5 kg
6 kg
4.5 kg
Leblanc process is employed in the manufacture of
Potash
Plaster of paris
Washing soda
Baking soda
Which of the following substances is used as an antiknock compound?
Ethyl acetate
Lead tetrachloride
Lead acetate
Tetraethyl lead
Which metal is protected by a layer of its own oxide?
Fe
AI
Au
Ag
Gooch crucible is used for the filtration of precipitates having
High ignition temperature
High concentration
Low temperature
High solubility
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