MEDIUM

Earn 100

Which of the following systems combines elements of both market and command economies?

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Important Questions on Equilibrium

EASY

Chemistry>Physical Chemistry>Equilibrium>Heterogeneous Equilibria

The Number of ways of choosing

10

objects out of

31

objects of which

10

are identical and the remaining

21

are distinct, is:

MEDIUM

Chemistry>Physical Chemistry>Equilibrium>Heterogeneous Equilibria

Consider a class of

5

girls and

7

boys. The number of different teams consisting of

2

girls and

3

boys that can be formed from this class, if there are two specific boys

A

and

B,

who refuse to be the members of the same team, is:

MEDIUM

Chemistry>Physical Chemistry>Equilibrium>Heterogeneous Equilibria

The value of

\sum_{r = 1}^{10} r \cdot \frac{{}^{n}C_{r}}{{}^{n}C_{r - 1}}

is equal to

MEDIUM

Chemistry>Physical Chemistry>Equilibrium>Heterogeneous Equilibria

Suppose that

20

pillars of the same height have been erected along the boundary of circular stadium. If the top of each pillar has been connected by beams with the top of all its non-adjacent pillars, then the total number of beams is:

MEDIUM

Chemistry>Physical Chemistry>Equilibrium>Heterogeneous Equilibria

A committee of

11

member is to be formed from

8

males and

5

females. If

m

is the number of ways the committee is formed with at least

6

males and

n

is the number of ways the committee is formed with at least

3

females, then

EASY

Chemistry>Physical Chemistry>Equilibrium>Heterogeneous Equilibria

There are

m

men and two women participating in a chess tournament. Each participant plays two games with every other participant. If the number of games played by the men between themselves exceeds the number of games played between the men and the women by

84

, then the value of

m

is :

HARD

Chemistry>Physical Chemistry>Equilibrium>Heterogeneous Equilibria

If in a regular polygon the number of diagonals is

54

, then the number of sides of this polygon is:

HARD

Chemistry>Physical Chemistry>Equilibrium>Heterogeneous Equilibria

{\sum_{i = 1}^{20} (\frac{^{20} C_{i - 1}}{^{20} C_{i} +^{20} C_{i - 1}})}^{3} = \frac{k}{21},

then

k

equals

HARD

Chemistry>Physical Chemistry>Equilibrium>Heterogeneous Equilibria

Hot copper turnings can be used as oxygen getter for inert gas supplies by slowly passing the gas over the turnings at 600 K.

2 {Cu}_{(s)} + \frac{1}{2} O_{2 (g)} ⇌ {Cu}_{2} O_{(s)}; K_{P} = 7.5 \times 1 0^{10} {atm}^{- 1 / 2}

The number of molecules of O₂ per litre left after equilibrium has reached are :

HARD

Chemistry>Physical Chemistry>Equilibrium>Heterogeneous Equilibria

The molar concentration of a pure solid or liquid is constant.

MEDIUM

Chemistry>Physical Chemistry>Equilibrium>Heterogeneous Equilibria

Which type of economy relies on supply and demand to make decisions about production and consumption?

EASY

Chemistry>Physical Chemistry>Equilibrium>Heterogeneous Equilibria

How is the attainment of equilibrium recognised in case of following equilibria?

Dissociation of $N_{2} O_{5}$ in a closed vessel.

MEDIUM

Chemistry>Physical Chemistry>Equilibrium>Heterogeneous Equilibria

Two processes are taking place in the opposite direction in equilibrium. How to write the equilibrium constant expression for heterogeneous equilibrium?

MEDIUM

Chemistry>Physical Chemistry>Equilibrium>Heterogeneous Equilibria

The dissociation equilibrium pressure of