Which of the following factors do you think will not affect the state of the equilibrium?

A compound of formula A₂B₃ has the hcp lattice. Which 3 atom forms the hcp lattice and what fraction of tetrahedral voids is occupied by the other atoms:

In a reaction A(g)+3B(g) $$\Longleftrightarrow$$ 2C(g) + 2D(g) initial concentration of B is twice of A but at equilibrium concentration of A and B becomes equal. The equilibrium constant for the reaction is

For a first order reaction, the plot of 't' against log C gives a straight line with slope equal to :

The value of $$\sum_{r=16}^{13}\left(r+2\right)\left(r-3\right)$$ is equal to

$$\int_{-\pi}^{\pi}\ \frac{2x\ \left(1+\sin\ x\right)}{1+\cos^2x}$$ =

In a certain town, 25% of the families own a phone and 15% own a car; 65% families own neither a phone nor a car and 2,000 families own both a car and a phone. Consider the following three statements :

(a) 5% families own both a car and a phone.

(b) 35% families own either a car or a phone.

(c) 40,000 families live in the town.

Then,