Practice Pakistan's most useful MCQs for competitive exams

Which of the following noble gases is not present in atmosphere?

• (A)  Argon
• (B)  Helium
• (C)  Radon
• (D)  Xenon

Answer

Submitted By :Ali Uppal

The easy way of balancing the chemical equation is_________?

• (A)  according to atom’s atomic number.
• (B)  According to atom’s atomic mass.
• (C)  First we balance Metal than non-metal than Hydrogen than Oxygen.
• (D)  None of the above

Answer

Submitted By :Ali Uppal

Which one of the following is also known as lactic acid ?

• (A)  3-Hydroxy propanoic acid
• (B)  2-Hydroxy propanoic acid
• (C)  2-hydroxy butanoic acid
• (D)  3-hydroxy butanoic acid

Answer

Submitted By :Ali Uppal

Ethers show functional group isomerism with __________________?

• (A)  aldehydes
• (B)  ketones
• (C)  alcohols
• (D)  carboxylic acid

Answer

Submitted By :Ali Uppal

Which one of the following compound does not have – OH group___________________?

• (A)  ethylene glycol
• (B)  glycerol
• (C)  picric acid
• (D)  ethyl acetate

Answer

Submitted By :Ali Uppal

When alcohol reacts with phosphorous halides it geive____________________?

• (A)  alkyl halides
• (B)  alkyl amine
• (C)  alkanes
• (D)  alkynes

Answer

Submitted By :Ali Uppal

An alcohol which can be prepared by fermentation is_________________?

• (A)  CH3OH
• (B)  C3H7OH
• (C)  CH3 – CH2 – OH
• (D)  C6H5OH

Answer

Submitted By :Ali Uppal

What is the molecular formula for Nitric acid ________ ?

• (A)  HNO2
• (B)  HNO3
• (C)  HN2O2
• (D)  H2NO4

Answer

Submitted By :Ali Uppal

The discovery of neutron became very late because _______ ?

• (A)  It does not carry any charge
• (B)  It does not move
• (C)  It is a fundamental particle
• (D)  It is present in nucleus

Answer

Submitted By :Ali Uppal

The absolute value of charge on electron was determined by ________ ?

• (A)  J.J.Thomson
• (B)  Chadwick
• (C)  Rutherford
• (D)  Robert Millikan

Answer

Submitted By :Ali Uppal