Practice Pakistan's most useful MCQs for competitive exams

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

Enthalpy of combustion for food fuel and other compounds can be measured accurately by________________?

• (A)  glass calorimeter
• (B)  bomb calorimeter
• (C)  thermometer
• (D)  manometer

Answer

Submitted By :Ali Uppal

Enthalpy change can be_________________?

• (A)  calculated by Hess law
• (B)  can be measured by calorimeter
• (C)  both A and B
• (D)  none

Answer

Submitted By :Ali Uppal

Two fundamental ways to transfer energy are________________?

• (A)  pressure and temperature
• (B)  pressure and volume
• (C)  heat and work
• (D)  heat and volume

Answer

Submitted By :Ali Uppal

Most of thermodynamic parameters are_________________?

• (A)  system
• (B)  surrounding
• (C)  phase
• (D)  state functions

Answer

Submitted By :Ali Uppal