CaCO₃ ⇌ CaO + CO₂ reaction in a lime kiln goes to completion because
CaCO₃ ⇌ CaO + CO₂ reaction in a lime kiln goes to completion because
Options
(a) CaO does not react to CO₂ to give CaCO₃ (b) backward reaction is very slow (c) CO₂ […]
Equilibrium
If concentration of reactants is increased by ‘x’,then the K becomes
If concentration of reactants is increased by ‘x’,then the K becomes
Options
(a) K + x (b) ln K /x (c) K (d) K/x
Correct Answer:
K
Explanation:
No explanation available. Be the […]
The pH value of 10⁻⁸ M HCl is
The pH value of 10⁻⁸ M HCl is
Options
(a) more than 7 (b) less than 7 (c) equal to 7 (d) more than or equal to 7
Correct Answer:
less than 7
The solubility product of a sparingly soluble salt AB at room temperature
The solubility product of a sparingly soluble salt AB at room temperature is 1.21 x 10⁻⁶.Its molar solubility is
Options
(a) 1.1x 10⁻³ mol L⁻¹ (b) 1.21 x 10⁻⁶ mol L⁻¹ (c) 1.01 […]
If a 0.00001 M solution of HCl is diluted thousand folds the pH of the resulting
If a 0.00001 M solution of HCl is diluted thousand folds the pH of the resulting solution is
Options
(a) 5 (b) 7 (c) 8 (d) 6.98
Correct Answer:
6.98
Explanation:
No explanation […]
40 mg of pure sodium peroxide is dissolved in 10L of distilled water. The pH of
40 mg of pure sodium peroxide is dissolved in 10L of distilled water. The pH of the solution is
Options
(a) 9 (b) 10 (c) 11 (d) 12
Correct Answer:
10
Explanation:
No […]
Which of the following will not act as a buffer?
Which of the following will not act as a buffer?
Options
(a) NaHCO₃ + H₂CO₃ (b) NaOH + NaCl (c) CH₃COOH + CH₃COOHNa (d) NH₄OH + NH₄Cl
Correct Answer:
NaOH + NaCl
Explanation: […]
An increase in pressure would favour which of the following reaction?
An increase in pressure would favour which of the following reaction?
Options
(a) N₂ + O₂ ⇌ 2NO (b) N₂O₄ ⇌ 2NO₂ (c) 2SO₂+O₂ ⇌ 2SO₃ (d) H₂+I₂ ⇌ 2HI
Correct Answer:
2SO₂+O₂ […]
The hydrogen ion concentration in mol/dm, in a 0.2 M solution of a weak acid
The hydrogen ion concentration in mol/dm, in a 0.2 M solution of a weak acid HA (Ka = 2 x 10⁻⁵) is close to
Options
(a) 2 x 10⁻⁵ (b) 2 x 10⁻⁴ […]
Which of the following is a buffer solution?
Which of the following is a buffer solution?
Options
(a) K₂SO₄ + H₂SO₄ (b) NaOH + Na₂SO₄ (c) NaOH + CH₃COOHNa (d) NH₄OH + NH₄Cl
Correct Answer:
NH₄OH + NH₄Cl
Explanation:
No explanation […]