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| Column I | Column II |
| A. Oxidation of $HCl$ by air | 1. Nickel |
| B. Formation of water | 2. $MnO _2$ |
| C. Decomposition of $KClO _3$ | 3. Copper |
| D. Hydrogenation of $C _2 H _4$ | 4. $CuCl _2$ |
| Code: | A | B | C | D |
| (a) | 4 | 3 | 2 | 1 |
| (b) | 1 | 2 | 3 | 4 |
| (c) | 3 | 4 | 1 | 2 |
| (d) | 2 | 1 | 4 | 3 |
| Column-I | Column-II |
| A. $HF$ | 1. Strong acid |
| B. $H _2 SO _4$ | 2. Strong base |
| C. $H _2$ | 3. Weak acid |
| D. $O ^{2-}$ | 4. Very weak acid |
| Column I | Column II |
| A. Pepsin | 1. Starch into maltose |
| B. Diastase | 2. Alcohol into acetic acid |
| C. Zymase | 3. Hydrolysis of peptide |
| D. Micoderma aceti | 4. Glucose into ethanol |
| Code: | A | B | C | D |
| (a) | 3 | 1 | 4 | 2 |
| (b) | 4 | 3 | 2 | 1 |
| (c) | 1 | 2 | 3 | 4 |
| (d) | 2 | 4 | 1 | 3 |
| Column I | Column II |
| A. Liquid Aerosol | 1. Soda water |
| B. Solid Aerosol | 2. Fog |
| C. Foam | 3. Milk |
| D. Emulsion | 4. Smoke |
| Code: | A | B | C | D |
| (a) | 2 | 4 | 1 | 3 |
| (b) | 4 | 3 | 2 | 1 |
| (c) | 1 | 2 | 3 | 4 |
| (d) | 3 | 1 | 4 | 2 |
| A. Sc<sup>3+</sup> | 1. 3d<sup>1</sup> |
| B. Ti<sup>3</sup> | 2. 3d<sup>0</sup> |
| C. Mn<sup>2+</sup> | 3. 3d<sup>10</sup> |
| D. Zn<sup>2+</sup> | 4. 3d<sup>5</sup> |
| A. Iron | 1. Artificial joint |
| B. Platinum | 2. Hemoglobin |
| C. Cobalt | 3. Catalysis |
| D. Titanium | 4. Vitamin – $B_{12}$ |
| Column I | Column II |
| A Charcoal | 1. Nitrogen |
| B Silica gel | 2. Hydrogen |
| C Mica | 3. Water |
| D Nicke | 4. Ammonia |
| Code: | A | B | C | D |
| (a) | 4 | 3 | 1 | 2 |
| (b) | 3 | 2 | 4 | 1 |
| (c) | 2 | 1 | 3 | 4 |
| (d) | 1 | 4 | 2 | 3 |
| Column-I | Column-II |
| A. $K _{ a }=\frac{\alpha^2 c }{1- c }$ | 1. $pH$ value |
| B. $pH = pK _{ a }+\log \frac{\text { [salt }]}{\text { [acid }]}$ | 2. Buffer capacity |
| C. $\beta=\frac{ dB }{ d ( pH )}$ | 3. Ostwald's dilution law |
| D. $-\log _{10}\left[ H _3 O ^{+}\right]$ | 4. Henderson - Hasselbalch equation |
| Column-I | Column-II |
| A. Glycerol + dil. $HNO _3$ | 1. Meso oxalic acid |
| B. Glycerol + bismuth nitrate | 2. Oxalic acid |
| C. Glycerol + Fenton's reagent | 3. Glyceric acid + Tartronic acid |
| D. Glycerol + acidified $KMnO _4$ | 4. Glycerose |
| Code. | A | B | C | D |
| (a) | 3 | 1 | 4 | 2 |
| (b) | 1 | 2 | 3 | 4 |
| (c) | 4 | 3 | 2 | 1 |
| (d) | 2 | 4 | 1 | 3 |