Which one of the following statements is not correct?

1.	\(Cl^-\) is a Lewis acid
2.	The pH of  \(10^{-8} ~\text {HCl}\)  solution is less than 7
3.	The ionic product of water at \(25^\circ \text C\) is \(10^{-14}~ \text {mol L}^{-2} \)
4.	Bronsted-Lowry theory could not explain the acidic character of \(AlCl_3\)

At \(90^\circ \text C,\) pure water has \([H_3O^+]=10^{-6}~\text{mole litre}^{-1}.\) What is the value of \(K_w\) at \(90^\circ \text C?\)

Which of the following anions is the strongest Brønsted base?

1. ${\mathrm{ClO}}_4^{-}$

2. ${\mathrm{ClO}}_3^{-}$

3. ${\mathrm{ClO}}_2^{-}$

4. ${\mathrm{ClO}}^{-}$

What is the pH of a 10⁻⁸ M solution of HCl in water?

1. -8

2. 8

3. between 6 and 7

4. between 7 and 8

Find the pair of solutions that can be mixed to prepare an acidic buffer.

1. Sodium chloride and sodium hydroxide

2. Sulphuric acid and sodium sulphate

3. Ammonium chloride and ammonium nitrate

4. Ammonium acetate and acetic acid

Identify the factor on which the equilibrium constant (Kp) for the reaction
H₂(g) + I₂(g) ⇌ 2HI(g) depends:

1. Catalyst

2. Temperature

3. Total pressure

4. The amounts of H₂ and I₂ present

The best indicator for detection of end point in titration of a weak acid and strong base is

1. methyl red (5 to 6)

2. methyl orange (3 to 4)

3. phenolphthalein (8 to 9.6)

4. bromothymol blue (6 to 7.5)

Which among the following is the conjugate acid of NH₂^-?

1. ${\mathrm{NH}}_4^{+}$

2. ${\mathrm{NH}}_3$

3. ${\mathrm{NH}}_2\mathrm{OH}$

4. ${\mathrm{N}}_2{\mathrm{H}}_4$

The pH of the neutralization point of 0.1 N ammonium hydroxide with 0.1 N HCl is

1. 1

2. 6

3. 9

4. 7