Chemistry Mcqs

A reaction has values of ?H and ?S which are both positive. The reaction __________________?

• (A)  Is spontaneous
• (B)  Spontaneity is temperature dependent
• (C)  Has an increasing free energy
• (D)  Is non-spontaneous

Answer

Submitted By :Ali Uppal

If internal energy of the system is increased ____________________?

• (A)  Change in state of the system is increased
• (B)  Temperature of the ystem may rise
• (C)  Chemical reaction may take place
• (D)  All

Answer

Submitted By :Ali Uppal

Which one is not state function ________________?

• (A)  Internal energy
• (B)  Enthalpy
• (C)  Gibbs free energy
• (D)  Work

Answer

Submitted By :Ali Uppal

Which is not heterocyclic compound _______________?

• (A)  Furan
• (B)  Thiophene
• (C)  Aniline
• (D)  Pyridine

Answer

Submitted By :Ali Uppal

the fractional distillation of petroleum produces gasoline up to ________________?

• (A)  10%
• (B)  15%
• (C)  20%
• (D)  30%

Answer

Submitted By :Ali Uppal

In cyano group the carbon atom shows which kind of hybridization___________________?

• (A)  sp2
• (B)  sp
• (C)  sp3
• (D)  none of the above

Answer

Submitted By :Ali Uppal

In sp3 hybridization the expected geometry of molecules will be__________________?

• (A)  square planar
• (B)  trigonal pyramidal
• (C)  tetrahedral
• (D)  linear

Answer

Submitted By :Ali Uppal

CuSO4 + Zn?ZnSO4+Cu is___________________?

• (A)  Spontaneous reaction
• (B)  Non-spontaneous reaction
• (C)  Endothermic
• (D)  Exothermic

Answer

Submitted By :Ali Uppal

State function the macroscopic property of system depends upon________________?

• (A)  path of reaction
• (B)  initial state
• (C)  final state
• (D)  initial and final state

Answer

Submitted By :Ali Uppal

When enthalpy of reactants is higher than product then reaction will be_________________?

• (A)  endothermic
• (B)  spontaneous
• (C)  non-spontaneous
• (D)  exothermic

Answer

Submitted By :Ali Uppal