Chemistry (General Concepts) MCQs with Answers

What is an amphoteric substance?

• A.A substance that acts only as an acid
• B.A substance that acts as both an acid and a base
• C.A substance that acts only as a base
• D.A substance that does not react with acids or bases

Which aldehyde is most reactive towards nucleophilic addition?

• A.Acetaldehyde
• B.Formaldehyde
• C.Benzaldehyde
• D.Propionaldehyde

In the modern periodic table, how many groups are there?

• A.8
• B.12
• C.18
• D.7

Periods in the periodic table are ?

• A.Vertical columns
• B.Horizontal rows
• C.Diagonal lines
• D.Circular rings

Nucleophile means _?

• A.Neutron lover
• B.Electron lover
• C.Proton lover
• D.Nucleus lover

Value of electronegativity of atoms A and B are 1.20 and 4.0 respectively, the percent ionic character will be ?

• A.73%
• B.50%
• C.92%
• D.43%

Unit of molar concentration is?

• A.L/mol
• B.g/L
• C.mol/g
• D.mol/L

Which one is not a type of stereoisomerism?

• A.Geometrical isomerism
• B.Optical isomerism
• C.Metamerism
• D.Conformational isomerism

Phenol differs from ethanol because it ?

• A.Is less reactive because of the aromatic ring
• B.Is less acidic because of hydrogen bonding
• C.Is more basic because of the hydroxyl group
• D.Is more acidic because of resonance stabilized conjugate base

An example of true solution is ?

• A.Oil in water
• B.Sand in water
• C.Milk in water
• D.Ink in water