Chemistry (General Concepts) MCQs with Answers

The solution in which the solute concentration is larger is called concentrated solution. Which one of the following is a concentrated solution?

• A.10 gram of sugar in 0.5 litre of water
• B.5 gram of sugar in 0.1 litre of water
• C.30 gram of sugar in 0.1 litre of water
• D.2 gram of sugar in 0.2 litre of water

The carbon atom carrying positive charge and attached to three other atoms or groups is called

• A.Carbanion
• B.Carbocation
• C.Free radical
• D.Carbene

The sum of the mole fractions of gases in a mixture is?

• A.0
• B.100
• C.Depends on the number of gases
• D.1

The bond order of H₂ is?

• A.3
• B.2
• C.0.5
• D.1

A substance that can donate a pair of electrons to form a coordinate covalent bond is called?

• A.Lewis acid
• B.Bronsted acid
• C.Lewis base
• D.Arrhenius base

O2 is paramagnetic. This is explained by

• A.Molecular Orbital Theory (MOT)
• B.Valence Bond Theory (VBT)
• C.Lewis Theory
• D.VSEPR Theory

Amorphous materials are:

• A.Completely disordered with no orderly arrangement of atoms anywhere
• B.Always crystalline in nature
• C.Can possess small regions of orderly arrangements of atoms
• D.Always liquid at room temperature

A triple bond contains?

• A.1 sigma + 1 pi bond
• B.2 sigma + 1 pi bond
• C.3 sigma bonds
• D.1 sigma + 2 pi bonds

The decreasing order of second ionization energy of K, Ca, Ba is _?

• A.Ca > K > Ba
• B.Ba > Ca > K
• C.K > Ca > Ba
• D.Ca > Ba > K

The chemical equilibrium is best explained as follows ?

• A.The reaction in which no chemical change occurs
• B.The reaction in which reactants are completely converted into products
• C.The reaction in which only the forward reaction takes place
• D.The reaction in which the rate of reverse reaction is equal to the forward reaction