Chemistry : Fill in the Blanks Type Questions Chemical Equilibrium

1. The conjugate base of HSO₄^- in acqueous solution is_____________.

(JEE 19820)

Answer: SO₄^2-

2. The hydrolysis of ethyl acetate in ______________________ medium is a _________ order reaction.

(JEE 1986)
Answer : acidic, first order

3. ____________ acid gives _____________ ion.
(options given: hydrobromic acid, hypobromous. Perbromic, bromide, bormite, perbromate)

(JEE 1988)

Answer: Hydrobromic acid, bromide (*Refer TMH Chemistry IIT 2007-Table 7.1)

4. For a given reversible reaction, at a fixed temperature equilibrium constants Kp and Kc are related by ____________________ .
(JEE 1994)

Answer : Kp = Kc (RT) ^{Δ v}g


4a. Solubility of iodine in water is greatly increased by the addition of iodide ions because of the formation of _______________________. (JEE 1994)

Answer: I3^-,

5. A ten fold increase in pressure on the reaction

N2(g) + 3H2(g) ↔ 2NH3(g) at equilibrium results in _____________ in Kp.

(JEE 1996)

Answer: no change

Reason: Kp of an equilibrium reaction is independent of pressure of the system.

6. For a gaseous reaction 2B → A, the equilibrium constant Kp is _____________ to/than Kc.
(JEE 1997)
Answer: smaller

7. In the reaction I^- + I2 → I3^-, the Lewis acid is _______________ .
(JEE 1997)
Answer: I2