Free MCQs & Online Quiz Practice for Exams

Q: The elements which are most abundant in Earth's crust are:

A) Si and Al

B) Ca and Mg

C) B and Ar

D) B and Ai

Q: Carbonates of Li are not stable like those of sodium due to:

A) Low electronegativity

B) Low electropositivity

C) High charge density of Li⁺

D) Low charge density of Li⁺

Q: Which one of the following metal sulphates is not soluble in water:

A) Na₂SO₄

B) K₂SO₄

C) BaSO₄

D) ZnSO₄

Q: Which of the following alkali metals forms only the normal oxide with O₂?

A) Li

B) K

C) Na

D) Rb

Q: Strongest reducing agent among the halogens is:

A) Cl₂

B) F₂

C) Br₂

D) I₂

Q: Which of the following has the lowest electron affinity?

A) F

B) I

C) Br

D) Cl

Q: Which of the following halides has the highest melting point?

A) NaCl

B) NaBr

C) NaF

D) NaI

Q: The highest boiling point of HF among the hydrogen halides is mainly due to:

A) Lowest electronegativity of F

B) Highest electronegativity of F

C) Lowest atomic weight of F

D) Small atomic radius of F

Q: Which of the following oxides is acidic in nature?

A) CaO

B) CO₂

C) SnO₂

D) PbO

Q: Third-period element that initially reacts rapidly with oxygen to form a protective oxide coating is:

A) Na

B) AI

C) Si

D) Mg

Q: Which element has the greater affinity for oxygen?

A) B

B) Na

C) K

D) Mg

Q: Which of the following is the strongest base?

A) NaOH

B) Be(OH)₂

C) Mg(OH)₂

D) Al(OH)₃

Q: The inert-pair effect dominates in:

A) Pb

B) Sn

C) C

D) Si

Q: The elements of Group-IVA which have no tendency to form a dichloride are:

A) C and Si

B) P and Sn

C) Ga and C

D) Sn and Si

Q: The first organic compound prepared in the laboratory was:

A) Peat

B) Urea

C) sugar

D) alcohal

Q: All the substances are organic except:

A) Graphite

B) Urea

C) Methane

D) acetic acid

Q: The type of coal containing highest percentage of carbon is:

A) Anthracite

B) Lignite

C) Peat

D) Bituminous

Q: Petroleum is mainly a mixture of:

A) Heterocyclic compounds

B) Aromatic hydrocarbons

C) Saturated hydrocarbons

D) Unsaturated hydrocarbons

Q: The major component of natural gas is:

A) Butane

B) Ethane

C) Propane

D) Methane

Q: All of the following fractions are obtained by destructive distillation of coal except:

A) Coal tar

B) Refinery gas

C) Coal gas

D) Coke