When same quantity of electricity is passed through aqueous AgNO₃ and H₂SO₄ solutions connected in series, 5.04 × 10^-2 g of H₂ is liberated. What is the mass of silver (in grams) deposited ? (Eq. wts. of hydrogen = 1.008, silver = 108)

• 54

• 0.54

• 5.4

• 10.8

When electric current is passed through acidified waterfor 1930 s, 1120 mL of H₂ gas is collected (at STP) at the cathode. What is the current passed in amperes ?

• 0.05

• 0.50

• 5.0

• 50

Which one of the following graphs represents Freundlich adsorption isotherm ?

34.

Which one of the following reactions does not occur?

• F₂ + 2Cl^- → 2F^- + Cl₂

• Cl₂ + 2F^- → 2Cl^- + F₂

• Br₂ + 2I^- → 2Br^- + I₂

• Cl₂ + 2Br^- → 2Cl^- + Br₂

For a reversible reaction, A $\rightleftharpoons$ B, which one of the following statements is wrong from the given energy profile diagram?

• Activation energy of forward reaction is greater than backward reaction

• The forward reaction is endothermic.

• The threshold energy is less than that of activation energy.

• The energy of activation of forward reaction is equal to the sum of heat of reaction and the energy of activation of backward reaction.

Acetone on addition to methyl magnesium bromide forms a complex, which on decomposition with acid gives X and Mg(OH)Br. Which one of the following is X?

• CH₃OH

• (CH₃)₃OH

• (CH₃)₂CHOH

• CH₃CH₂OH

Identify A and B in the following reaction

${\mathrm{CH}}_3-{\mathrm{CH}}_{3 }\stackrel{\mathrm{B}}{\leftarrow } {\mathrm{CH}}_3\mathrm{COOH} \stackrel{\mathrm{A}}{\to } {\mathrm{CH}}_3{\mathrm{CH}}_2\mathrm{OH}$

• A - HI + red P; B - LiAlH₄

• A - Ni/ $∆$ ; B - LiAlH₄

• A - LiAlH₄ ; B - HI + red P

• A - Pd- BaSO₄ ; B - Zn - HCl

Match the following:

The correct match is

• A - v; B - i; C - ii; D - iii

• A - iv; B - ii; C - i; D - iii

• A - iii; B - i; C - ii; D - iv

• A - v; B - ii; C - iii; D - i

If ${\overline{\mathrm{M}}}_{\mathrm{w}}$ is the weight average molecular weight and ${\overline{\mathrm{M}}}_{\mathrm{n}}$ is the number average molecular weight of a polymer, the poly disparity index (PDI) of the polymer is given by

• $\frac{{\overline{\mathrm{M}}}_{\mathrm{n}}}{{\overline{\mathrm{M}}}_{\mathrm{w}}}$

• $\frac{{\overline{\mathrm{M}}}_{\mathrm{w}}}{{\overline{\mathrm{M}}}_{\mathrm{n}}}$

• ${\overline{\mathrm{M}}}_{\mathrm{w}} \times {\overline{\mathrm{M}}}_{\mathrm{n}}$

• $\frac{1}{{\overline{\mathrm{M}}}_{\mathrm{w}} \times {\overline{\mathrm{M}}}_{\mathrm{n}}}$

Hydrolysis of sucrose with dilute aqueous sulphuric acid yields-

• 1 : 1 D-(+)-glucose; D-(-)-fructose

• 1 : 2 D-(+)-glucose; D-(-)-fructose

• 1 : 1 D-(-)-glucose; D-(+)-fructose

• 1 : 2 D-(-)-glucose; D-(+)-fructose