The adsorption of a gas, on a solid surface, varies with pressure of the gas in which of the following manner?

1) Slow fast independent of the pressure
2) Fast slow independent of the pressure
3) Independent of the pressure slow fast
4) Independent of the pressure fast slow

The total number of σ and π bonds present in azobenzene are:

1) 24σ, 6π

2) 25σ, 7π

3) 28σ, 6π

4) 27σ, 6π

Which of the following forms cationic micelles above certain concentrations?

1) Sodium dodecyl sulphate
2) Urea
3) Sodium acetate
4) Cetyl trimethyl ammonium bromide

An isotone of ⁷⁶ Ge₃₂ is
1) ⁷⁷Ge₃₂
2) ⁷⁷As₃₃
3) ⁷⁷Se₃₄
4) ⁷⁸Se₇₄

Within a specified period, an increase in atomic number is usually accompanied by:

1. an increase in atomic radius and an increase in electronegativity.
2. a decrease in atomic radius and an increase in electronegativity.
3. an increase in atomic radius and a decrease in electronegativity.
4. a decrease in atomic radius and a decrease in electronegativity.

The number of sodium atoms in 2 moles of sodium ferrocyanide is

1)  8 x 6.02 x 10²³

2)  4 x 6.02 x 10²³

3)  6.02 x 10²³

4)  2

Acetone and acetophenone can be distinguished by :

 1) Tollens test
2) CNP TEST
3) Schiff's regent
4) saturated solution of NaHSO₃.

Specific volume of cylindrical virus particle is 6.02 × 10^-2 cc/gm whose radius and length are 7 Å and 10 Å respectively. If N_A= 6.02 ×10²³, find molecular weight of virus.
1) 15.4 kg/mol
2) 1.54 × 10⁴ kg/mol
3) 3.08 × 10⁴ kg/mol
4) 3.08 × 10³ kg/mol

When sodium hydroxide solution is added to a freshly prepared solution of ferrous sulphate, a green precipitate of ferrous hydroxide is formed which on standing turns brown because:

1) ferric salts are unstable
2) the mixture becomes dirty
3) ferrous hydroxide becomes ferric oxide
4) green ferrous hydroxide oxidises to brown ferric hydroxide

At a particular temperature, the ratio of molar conductance to specific conductance of 0.01 M NaCl solution is:

1) 10⁵ cm³mol⁻¹
2) 10³ cm³mol⁻¹
3) 10 cm³mol⁻¹
4) 10⁵ cm²mol⁻¹