Match the following:

• A - 3; B - 2; C - 4; D - 1

• A - 2; B - 3; C - 4; D - 1

• A - 1; B - 3; C - 5; D - 4

• A - 4; B - 2; C - 3; D - 5

The slope of the graph drawn between ln k and $\frac{1}{\mathrm{T}}$ as per Arrhenius equation gives the value (R = gas constant; E_a = Activation energy)

• $\frac{\mathrm{R}}{{\mathrm{E}}_{\mathrm{a}}}$

• $\frac{{\mathrm{E}}_{\mathrm{a}}}{\mathrm{R}}$

• $-\frac{{\mathrm{E}}_{\mathrm{a}}}{\mathrm{R}}$

• $\frac{-\mathrm{R}}{{\mathrm{E}}_{\mathrm{a}}}$

Which one of the following statements is not correct?

• O₃ is used as a germicide.

• In O₃ , O - O bond length is identical with that of molecular oxygen.

• O₃ is an oxidising agent

• The shape of O₃ molecule is angular.

Which of the following reactions does not take place?

• F₂ + 2Cl^- → 2F^- + Cl₂

• Br₂ + 2I^- → 2Br^- + I₂

• Cl₂ + 2Br^- → 2Cl^- + Br₂

• Cl₂ + 2F^- → 2Cl^- + F₂

Calgon is

• Na₂HPO₄

• Na₃PO₄

• Na₆P₆O₁₈

• NaH₂PO₄

Consider the following statements-

I. Cs⁺ ion is more highly hydrated than other alkali metal ions.

II. Among the alkali metals, only lithium forms a stable, nitride by direct combination with nitrogen.

III. Among the alkali metals Li, Na, K, Rb the metal, Rb has the highest melting point.

IV. Among the alkali metals Li, Na, K, Rb only Li forms peroxide when heated with oxygen.

Select the correct statement is

• I

• II

• III

• IV

Which of the following causes blue baby syndrome?

• High concentration of lead in drinking water.

• High concentration of sulphates in drinking water.

• High concentration of nitrates in drinking water.

• High concentration of copper in drinking water.

18.

Which of the following belongs to the homologous series of C₅H₈O₂N?

• C₆H₁₀O₃N

• C₆H₈O₂N₂

• C₆H₁₀O₂N₂

• C₆H₁₀O₂N

In Dumas method, 0.3 g of an organic compound gave 45 mL of nitrogen at STP. The percentage of nitrogen is

• 16.9

• 18.7

• 23.2

• 29.6

The IUPAC name of the following compound is-

(CH₃)₂CH-CH=CH-CH=CH(C₂H₅)-CH₃

• 2, 7-dimethyl-3, 5-nonadiene

• 2, 7-dimethyl-2-ethylheptadene

• 2-methyl-7-ethyl-3, 5-octadiene

• 1, 1-dimethyl-6-ethyl-2, 4-heptadiene