Practice Pakistan's most useful MCQs for competitive exams

Which of the following molecule is polar__________________?

• (A)  CCI4
• (B)  CO2
• (C)  BF3
• (D)  none of the above

Answer

Submitted By :Ali Uppal

Which of the following elements has greater 1st ionization energy__________________?

• (A)  B
• (B)  C
• (C)  N
• (D)  O

Answer

Submitted By :Ali Uppal

Which catalyst is used in contact process ?

• (A)  Fe2O3
• (B)  V2O5
• (C)  SO3
• (D)  Ag2O

Answer

Submitted By :Ali Uppal

What is maximum number of electrons in an orbital with m (magnetic quantum number) = 3 ?

• (A)  6
• (B)  4
• (C)  3
• (D)  2

Answer

Submitted By :Ali Uppal

A method of separation of components from its solution using Distribution law is ___________________?

• (A)  Sublimation
• (B)  Crystallisation
• (C)  Solvent extraction
• (D)  Distillation

Answer

Submitted By :Ali Uppal

The type of filtering media used for filtration depending upon____________________?

• (A)  Nature of reactants
• (B)  Nature of crucible
• (C)  Nature of product
• (D)  Nature of precipitate

Answer

Submitted By :Ali Uppal

Water absorber used in combustion analysis is___________________?

• (A)  50% KOH
• (B)  Lime water
• (C)  CaCl2
• (D)  Mg (CIO4)2

Answer

Submitted By :Ali Uppal

Which of the following set has all species isoelectronic__________________?

• (A)  F – Cl – Br
• (B)  Li+1 – Na+1 – K+1
• (C)  F – Ne – Na+
• (D)  H+ – H- – H

Answer

Submitted By :Ali Uppal

The volume occupied by 1.4g CO at S.T.P is___________________?

• (A)  22.4 dm3
• (B)  2.24 dm3
• (C)  1.12 cm3
• (D)  1.12 dm3

Answer

Submitted By :Ali Uppal

Isotopes differs in______________________?

• (A)  arrangement of electrons in orbitals
• (B)  position in the periodic table
• (C)  properties depend upon mass
• (D)  chemical properties

Answer

Submitted By :Ali Uppal