Rate of diffusion of a gas is ________

(a)

directly proportional to its density

(b)

directly proportional to its molecular weight

(c)

directly proportional to its square root of its molecular weight

(d)

inversely proportional to the square root of its molecular weight

All the naturally occurring processes proceed spontaneously in a direction which leads to _______________

(a)

decrease in entropy

(b)

increase in enthalpy

(c)

increase in free energy

(d)

decrease in free energy

At a given temperature and pressure, the equilibrium constant values for the equilibria
\({ 3A }_{ 2 }+{ B }_{ 2 }+2C\overset { { K }_{ 1 } }{ \rightleftharpoons } { 2A }_{ 3 }BC\) and
\({ A }_{ 3 }BC\overset { { K }_{ 2 } }{ \rightleftharpoons } 3/2\left[ { A }_{ 2 } \right] +\frac { 1 }{ 2 } { B }_{ 2 }+C\)
The relation between K₁ and K₂ is ___________

(a)

\(K_1={1\over \sqrt{K_2}}\)

(b)

\(K_2=K_1^{-1/2}\)

(c)

\(K_1^2=2K_2\)

(d)

\({K_1\over 2}=K_2\)

Which of the following concentration terms is/are independent of temperature _____________

(a)

molality

(b)

molarity

(c)

mole fraction

(d)

(a) and (c)

In the molecule O_A = C = O_B, the formal charge on O_A, C and O_B are respectively.

(a)

-1, 0, +1

(b)

+1, 0, -1

(c)

-2, 0, +2

(d)

0, 0, 0

In the hydrocarbo \(\overset { 7 }{ { CH }_{ 3 } } -\overset { 6 }{ { CH }_{ 2 } } -\overset { 5 }{ CH } =\overset { 4 }{ CH } -\overset { 3 }{ { CH }_{ 2 } } -\overset { 2 }{ C } =\overset { 1 }{ CH } \) the state of hybridisation of carbon 1,2,3,4 and 7 are in the following sequence.

(a)

sp, sp, sp³, sp², sp³

(b)

sp², sp, sp³, sp², sp³

(c)

sp, sp, sp², sp, sp³

(d)

none of these

What is the hybridisation state of benzyl carbonium ion ?

(a)

sp²

(b)

spd²

(c)

sp³

(d)

sp²d

\({ C }_{ 2 }{ H }_{ 5 }Br+2Na\overset { dry\quad ether }{ \longrightarrow } { C }_{ 4 }{ H }_{ 10 }+2NaBr\) The above reaction is an example of which of the following

(a)

Reimer Tiemann reaction

(b)

Wurtz reaction

(c)

Aldol condensation

(d)

Hoffmann reaction

Of the following compounds, which has the highest boiling point?

(a)

n-Butyl chloride

(b)

Isobutyl chloride

(c)

t-Butyl chloride

(d)

n-propyl chloride

Which of the following is natural and human disturbance in ecology ?

(a)

Forest fire

(b)

Floods

(c)

Acid rain

(d)

Green house effect