Practice Pakistan's most useful MCQs for competitive exams

Which of the following is pseudo solid_____________________?

• (A)  CaF2
• (B)  NaCl
• (C)  Glass
• (D)  Diamond

Answer

Submitted By :Ali Uppal

Plasma is used in_________________?

• (A)  Fluorescent bulb
• (B)  Neon signs
• (C)  Lasers
• (D)  All of these

Answer

Submitted By :Ali Uppal

A real gas obeying vander waals equation will resemble the ideal gas if_______________________?

• (A)  Both a and b are small
• (B)  Both a and b are large
• (C)  a is small and b is large
• (D)  a is large and b is small

Answer

Submitted By :Ali Uppal

The process of fermentation involves all the enzymes except__________________?

• (A)  Diastase
• (B)  Invertase
• (C)  Zymase
• (D)  Sucrase

Answer

Submitted By :Ali Uppal

Which one of the following is not a good leaving group ?

• (A)  HSO4-
• (B)  Cl-
• (C)  OH-
• (D)  Br-

Answer

Submitted By :Ali Uppal

When toluene reacts with chlorine in sunlight the first major product is__________________?

• (A)  Benzy1 chloride
• (B)  Benzal dichloride
• (C)  O-chlorotoluene
• (D)  O-chlorotoluene and P-chlorotoluene

Answer

Submitted By :Ali Uppal

Vinyl acetylene combines with hydrochloric acid produces___________________?

• (A)  Diviny1 acetylene
• (B)  Ethylidine dichloride
• (C)  Chloroprene
• (D)  1 – 3 – 3 – trichloro butane

Answer

Submitted By :Ali Uppal

A great variety of the organic compounds is due to its property of carbon_________________?

• (A)  Show tetravalency
• (B)  Exhibit catenation
• (C)  Show isomerism
• (D)  Can form multiple bonds

Answer

Submitted By :Ali Uppal

In the complex [Cr(OH)3(H2O)3] the coordination number is __________________?

• (A)  2
• (B)  3
• (C)  4
• (D)  6

Answer

Submitted By :Ali Uppal

When chlorine is passed through hot solution of caustic soda the reaction is said as___________________?

• (A)  Displacement
• (B)  Reduction
• (C)  Disproportionation reaction
• (D)  Double displacement reaction

Answer

Submitted By :Ali Uppal