Practice Pakistan's most useful MCQs for competitive exams

The word Alkali means__________________?

• (A)  Base
• (B)  Basic salt
• (C)  Ashes
• (D)  Spirit

Answer

Submitted By :Ali Uppal

Which one is least ionic in nature and decompose on heating ?

• (A)  LiOH
• (B)  NaOH
• (C)  KOH
• (D)  CsOH

Answer

Submitted By :Ali Uppal

Which one is natron ?

• (A)  Na2CO3
• (B)  Na2CO3.10H2O
• (C)  Na2CO3.H2O
• (D)  NaHCO3

Answer

Submitted By :Ali Uppal

Which ion will have maximum value of heat of hydration ?

• (A)  A1+3
• (B)  Cs+
• (C)  Ba+
• (D)  Mg+2

Answer

Submitted By :Ali Uppal

Electrolysis of dilute solution of NaCl results at the anode_______________?

• (A)  sodium
• (B)  hydrogen
• (C)  chlorine
• (D)  oxygen

Answer

Submitted By :Ali Uppal

Carnalite has chemical formula__________________?

• (A)  KCI
• (B)  KCI.MgCl2.6H2O
• (C)  Na2B4O7.10H2O
• (D)  CaCO3.MgCO3

Answer

Submitted By :Ali Uppal

NaOH is named as caustic soda because________________?

• (A)  It corrodes the organic tissues
• (B)  It is used in soda water
• (C)  It reacts with chlorine gas
• (D)  It reacts with fats to form soap

Answer

Submitted By :Ali Uppal

Second ionization potential of alkali metals are very high due to_______________?

• (A)  being s-block elements
• (B)  inert gas configurations
• (C)  ns1 electronic configuration
• (D)  being metals

Answer

Submitted By :Ali Uppal

Magnesium metal does not burn in the vessel containing_______________?

• (A)  N2
• (B)  O2
• (C)  N2 and O2
• (D)  Ne

Answer

Submitted By :Ali Uppal

Sodium is not observed in +2 oxidation state because of its__________________?

• (A)  high first ionization potential
• (B)  high second ioniation potential
• (C)  high ionic radius
• (D)  high electronegativity

Answer

Submitted By :Ali Uppal