Chemistry : Equilibrium

Assertion : Ice $\rightleftharpoons$ water, if pressure is applied water will evaporate.

Reason : Increases of pressure pushes the equilibrium towards the side in which number of gaseous molecule increases.

• If both assertion and reason are true and reason is the correct explanation of assertion

• If both assertion and reason are true but reason is not the correct explanation of assertion

• If assertion is true but reason is false

• If both assertion and reason are false

Assertion : In an acid-base titration involving strong base and a weak acid, methyl orange can be used as an indicator.

Reason : Methyl orange changes its colour in pH range of 7 to 9.

• If both assertion and reason are true and reason is the correct explanation of assertion

• If both assertion and reason are true but reason is not the correct explanation of assertion

• If assertion is true but reason is false

• If both assertion and reason are false

The K_sp of Mg(OH)₂ is 1 x 10^-12 , 0.01 M Mg(OH)₂ will precipitate at the limited pH :

• 3

• 9

• 5

• 8

NH₄COONH₂ (s) $\rightleftharpoons$ 2NH₃ (g) + CO₂ (g) ,if equlibrium pressure is 3 atm for the above reaction .K_p for the reaction is :

• 4

• 27

• 4/27

• 1/27

The pH of the solution obtained on neutralisation of 40 mL 0.1 M NaOH with 40 mL 0.1 M CH₃COOH is

• 7

• 8

• 6

• 3

In P versus V graph, the horizontal line is found in which exists

• Gas

• Liquid

• Equilibrium between gas and liquid

• Super critical temperature

The correct order of increasing [H₃O+] in the following aqueous solutions is

• 0.01 M H₂S < 0.01 M H₂SO₄ < 0.01M NaCl< 0.01 M NaNO₂

• 0.01 M NaCl<0.01 M NaNO₂ <0.01 M H₂S <0.01 M H₂SO₄

• 0.01 M NaNO₂ < 0.01 M NaCl < 0.01 M H₂S <0.01 M H₂SO₄

• 0.01 M H₂S < 0.01 M NaNO₂ < 0.01 M NaCl <0.01M H₂SO₄

During titration of acetic acid with aqueous NaOH solution, the neutralisation graph has a vertical line. This line indicates

• alkaline nature of equivalence

• acidic nature of equivalence

• neutral nature of equivalence

• depends on experimental proceeding

The standard molar heat of formation of ethane ,CO₂ and water are respectively - 21.1 , - 94.1 and - 68. 3 kcal .The standard molar heat of combustion of ethane will be :

• - 372 kcal

• 162 kcal

• - 240 kcal

• 183.5 kcal

Assertion : According to Le-Chatelier's principle addition of heat to an equilibrium solid $\rightleftharpoons$liquid results in decrease in the amount of solid.

Reason : Reaction is endothermic, so on heating forward reaction is favoured.

• If both assertion and reason are true and reason is the correct explanation of assertion

• If both assertion and reason are true but reason is not the correct explanation of assertion.

• If assertion is true but reason is false.

• If both assertion and reason are false.