231.

A chemical reaction is in equilibrium when

• the reactants are completely transformed into products

• the rate of forward reaction is equal to the rate of backward reaction

• the formation of products is minimised

• equal amount of reactants and products are present

For the following gaseous reaction, H₂ + I₂ $\rightleftharpoons$2HI, the equilibrium constant

• K_p > K_c

• K_p< K_c

• K_p= K_c

• K_p= 1/K_c

According to Le-Chatelier's principle which of the following factors influence a chemical system?

• Concentration only

• Pressure only

• Temperature only

• Concentration, pressure and temperature

The pH of water decreases with?

• increase in temperature

• increase in pressure

• decrease in temperature

• decrease in pressure

The aqueous solution of which one of the following is basic?

• HOCl

• NaHSO₄

• NH₄NO₃

• NaOCl

The pH of 10^-7 M NaOH is

• 7.01

• between 7 and 8

• between 9 and 10

• greater than 10

If H⁺ concentration of fruit juice is 3.3 × 10^-2, then its pH will be

• 4.8 basic

• 4.8 neutral

• 4.8 acidic

• 1.6 acidic

The correct order of the acidity of following acids is-

CH₃COOH, HCOOH, Cl-CH₂COOH, F-CH₂COOH, (Cl₂)CHCOOH

• Cl₂CHCOOH > F-CH₂COOH > Cl-CH₂COOH > HCOOH > CH₃COOH

• F-CH₂COOH > Cl-CH₂COOH > Cl₂CHCOOH > HCOOH > CH₃COOH

• HCOOH > CH₃COOH > Cl-CH₂COOH > Cl₂CHCOOH > F-CH₂COOH

• None of the above

Zwitter ion is

• a dipolar ion

• ion formed from amino acid

• internal salt

• All of the above

Solubility product of pure PbCl₂ will be

• K_sp = S²

• K_sp = 4S³

• K_sp = 108 S⁵

• K_sp = S