For a stable molecule, the value of bond order must be

• there is no relationship between stability and bond order

• zero

• positive

• negative

During the formation of a chemical bond

• electron-electron repulsion becomes more than the nucleus-electron attraction.

• energy of the system does not change.

• energy increases

• energy decreases

Formation of coloured solution is possible when metal ion in the compound contains

• paired electrons

• lone pair of electrons

• unpaired electrons

• none of the above

Dalton's law of partial pressure is applicable to which one of the following systems?

• NH₃ + HCl

• NO + O₂

• H₂ + Cl₂

• CO + H₂

In acetylene molecule, between the carbon atoms there are

• three pi bonds

• one sigma and two pi bonds

• two sigma and one pi bonds

• three sigma bonds

Which of the following is an intensive property?

• temperature

• viscosity

• surface tension

• all of these

In equilibrium state the value of $∆$G is

• zero

• negative

• positive

• may be negative or positive

8.

In the ionic equation

-BiO${}_3^{-}$ + 6H⁺ + xe^- → Bi³⁺ + 3H₂O , the value of x is

• 6

• 2

• 4

• 3

Molarity of a given orthophosphoric acid solution is 3M. It's normality is

• 9 N

• 0.3 N

• 3 N

• 1 N

A body of mass 10 mg is moving with a velocity of 100 ms^-1. The wavelength of de-Broglie wave associated with it would be (h = 6.63 × 10^-34 Js)

• 6.63 × 10^-35 m

• 6.63 × 10^-34 m

• 6.63 × 10^-31 m

• 6.63 × 10^-37 m