General
✓✗Which of the following is a non-electrolyte in water?
- Sodium chloride
- Sodium hydroxide
- Urea
- Hydrochloric acid
General
✓✗The solubility of an M2S-type salt is 3.5 × 10−6 mol L−1. Its solubility product is
- 1.7 × 10−6
- 1.7 × 10−12
- 1.7 × 10−16
- 1.7 × 10−18
General
✓✗Assertion: A catalyst does not change the equilibrium constant of a reaction.
Reason: A catalyst lowers the activation energies of the forward and backward reactions by the same amount.
Reason: A catalyst lowers the activation energies of the forward and backward reactions by the same amount.
- Both Assertion and Reason are true and Reason is the correct explanation of Assertion
- Both Assertion and Reason are true but Reason is not the correct explanation of Assertion
- Assertion is true but Reason is false
- Both Assertion and Reason are false
General
✓✗Amongst the given options, which of the following molecules/ions acts as a Lewis acid?
- H2O
- BF3
- NH3
- OH−
General
✓✗For N2(g) + 3H2(g) ⇌ 2NH3(g), the units of Kp are
- atm−1
- atm2
- atm−2
- atm
General
✓✗The reaction of the ions of a salt with water to give an acidic or basic solution is called
- neutralisation
- precipitation
- salt hydrolysis
- ionisation of water
General
✓✗For the reaction BaO2(s) ⇌ BaO(s) + O2(g); ΔH = +ve, the equilibrium pressure of O2 can be changed by
- increasing the mass of BaO2
- increasing the temperature
- increasing the masses of BaO2 and BaO both
- increasing the mass of BaO
General
✓✗If the reaction quotient Q is equal to Kc, the reaction is
- at equilibrium
- complete
- proceeding in the backward direction
- proceeding in the forward direction
General
✓✗The molar solubility of Ca3(PO4)2 is s. Its Ksp is
- 27s4
- 6s5
- 108s5
- 36s5
General
✓✗A strong acid has a
- strong conjugate base
- weak conjugate base
- very small Ka
- strong conjugate acid
General
✓✗Which of the following is an example of a solid−gas (sublimation) equilibrium?
- NaCl(s) ⇌ NaCl(aq)
- H2O(l) ⇌ H2O(g)
- H2O(s) ⇌ H2O(l)
- I2(s) ⇌ I2(g)
General
✓✗For N2O4(g) ⇌ 2NO2(g), 1 mol of N2O4 is 20% dissociated at equilibrium at a total pressure of 1 atm. The value of Kp is about
- 0.04 atm
- 0.2 atm
- 0.333 atm
- 0.167 atm
General
✓✗A solution has [H+] = 1 × 10−9 M. The solution is
- acidic
- strongly acidic
- neutral
- basic
General
✓✗Which one of the following can be obtained on the basis of Le Chatelier’s principle?
- Equilibrium constant of a chemical reaction
- Entropy change in a reaction
- Shift in equilibrium position on changing the value of a constraint
- Dissociation constant of a weak acid
General
✓✗For CaCO3(s) ⇌ CaO(s) + CO2(g), Kp = 0.2 atm at a certain temperature. If more CaCO3 is added to the equilibrium mixture at the same temperature, the pressure of CO2 will
- become zero
- decrease
- remain 0.2 atm
- increase