Practice Pakistan's most useful MCQs for competitive exams

Bond will beionic when E.N difference of bonded atom is ____________________?

• (A)  Equal to 1.7
• (B)  Greater than 1.7
• (C)  Less than 1.7
• (D)  No specificity exists

Answer

Submitted By :Ali Uppal

Ionic bond is produced after complete transfer of ________________ ?

• (A)  Nucleus
• (B)  Neutrons
• (C)  Electrons
• (D)  Protons

Answer

Submitted By :Ali Uppal

In a period electronegativity from left to right_________________?

• (A)  Increases
• (B)  Decreases
• (C)  Remain constant
• (D)  Variable trend

Answer

Submitted By :Ali Uppal

Critical temperature for different gases is different and depends upon______________?

• (A)  Size of molecule
• (B)  Shape of molecule
• (C)  Intermolecular attractions
• (D)  All of the above

Answer

Submitted By :Ali Uppal

The diffusion of gases at absolute zero will be________________?

• (A)  Unchanged
• (B)  Slightly decreased
• (C)  Slightly increased
• (D)  Zero

Answer

Submitted By :Ali Uppal

At constant temperature the pressure of an ideal gas is doubled its density becomes_______________?

• (A)  Half
• (B)  Double
• (C)  Same
• (D)  None

Answer

Submitted By :Ali Uppal

The introduction of Kelvin scale in thermodynamic is according to_______________?

• (A)  Boyles law
• (B)  Charles law
• (C)  Daltons law
• (D)  Grahams law

Answer

Submitted By :Ali Uppal

Which one has the lowest density at room temperature ?

• (A)  Ne
• (B)  N2
• (C)  NH3
• (D)  CO

Answer

Submitted By :Ali Uppal

Under what conditions the gases deviate from the ideal behavior ?

• (A)  High temperature
• (B)  Low temperature
• (C)  High pressure
• (D)  B and C

Answer

Submitted By :Ali Uppal

Ideal gasses have all the following characteristics except ?

• (A)  Absence of intermolecular forces
• (B)  Collisions among the molecules of an ideal gas are perfectly elastic
• (C)  The molecules occupy no space
• (D)  All of the above are correct

Answer

Submitted By :Ali Uppal