Practice Pakistan's most useful MCQs for competitive exams

________________ is study about energy of a chemical system ?

• (A)  thermochemistry
• (B)  thermodynamics
• (C)  chemical kinetics
• (D)  stoichiometry

Answer

Submitted By :Ali Uppal

Unit of heat in SI system is________________?

• (A)  J
• (B)  KCaL
• (C)  Cal
• (D)  GJ

Answer

Submitted By :Ali Uppal

Total energy of a system is_________________?

• (A)  P.E + K.E
• (B)  P.E + heat energy
• (C)  K.E + heat energy
• (D)  P.E + mechanical energy

Answer

Submitted By :Ali Uppal

A solid may be made up of_________________?

• (A)  Atoms
• (B)  Ions
• (C)  Molecules
• (D)  A, B, and C

Answer

Submitted By :Ali Uppal

If we provide very high amount of heat to a liquid its boiling point will__________________?

• (A)  increase
• (B)  remains constant
• (C)  decrease
• (D)  there will be no boiling

Answer

Submitted By :Ali Uppal

Which one of the following has highest volatility_________________?

• (A)  Diethyl ether
• (B)  Ethyl alcohol
• (C)  Water
• (D)  Ethylene glycol

Answer

Submitted By :Ali Uppal

During which process empty spaces between particles become minimum ?

• (A)  ionization
• (B)  condensation
• (C)  fusion
• (D)  evaporation

Answer

Submitted By :Ali Uppal

Table salt crystallizes with a______________________?

• (A)  Face centered cubic lattice
• (B)  body centered cubic lattice
• (C)  simple cubic lattice
• (D)  othorhombic lattice

Answer

Submitted By :Ali Uppal

Vapour pressure is not affected by_______________?

• (A)  Surface area
• (B)  temperature
• (C)  intermolecular forces
• (D)  atmospheric pressure

Answer

Submitted By :Ali Uppal

The ttractive forces between the partial positive end of one molecule and partial negative end of other molecule are called________________?

• (A)  Dipole-dipole forces
• (B)  Ion dipole-dipole forces
• (C)  London dispersion forces
• (D)  Debye forces

Answer

Submitted By :Ali Uppal