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Answer
(a) 4 3 1 2
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(i) Zinc blende - (a) $Al _2 O _3 \cdot 2 H _2 O$
(ii) Bauxite - (b) $ZnCO _3$
(iii) Zincite - (c) ZnS
(iv) Calamine - (d) $ZnO$
→(ii) Bauxite - (b) $ZnCO _3$
(iii) Zincite - (c) ZnS
(iv) Calamine - (d) $ZnO$
| (i) Resistance | (a) Ohm m |
| (ii) Resistivity | (b) $Sm ^{-1}$ |
| (iii) Conductance | (c) $Ohm$ |
| (iv) Specific conductance | (d) $S$ |
| Code: | A | B | C | D |
| $i$. | a | b | c | d |
| ii. | c | a | d | b |
| iii. | d | c | b | a |
| iv. | b | d | a | c |
| A. Tungsten | 1. Development of human civilization |
| B. Titanium | 2. Light bulb filament |
| C. Molybdenum | 3. Artificial joint |
| D. Copper | 4. Boiler plants |
| Column-I | Column-II |
| A. Sulphuric acid | 1. Soap industry |
| B. Sodium hydroxide | 2. Baking soda |
| C. Magnesium hydroxide | 3. Fertilizer industry |
| D. Sodium bicarbonate | 4. Antacid tabletes |
| List-I | List-II |
| A. $t_{1 / 2}$ of first order reaction | 1. $k=\frac{2.303}{t} \log \left[\frac{\left( A _0\right)}{( A )}\right]$ |
| B. $t_{1 / 2}$ of $n^{\text {th }}$ order | 2. $f=e^{-\frac{E_a}{R T}}$ |
| C. Fraction of effective collision | 3. $\frac{0.6932}{k}$ |
| D. Rate constant of first order reaction | 4. $\frac{2^{n-1}-1}{(n-1) k\left( A _0\right)^{n-1}}$ |
| Code | A | B | C | D |
| (a) | 3 | 4 | 1 | 2 |
| (b) | 4 | 2 | 3 | 1 |
| (c) | 1 | 3 | 2 | 4 |
| (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 |
(i) White phosphorous – (a) Volcanic eruptions
(ii) Red phosphorous – (b) Yellow phosphorous
(iii) Phosphine – (c) Match boxes
(iv) $SO_2$ – (d) smoke screen
→(ii) Red phosphorous – (b) Yellow phosphorous
(iii) Phosphine – (c) Match boxes
(iv) $SO_2$ – (d) smoke screen
| Column-I | Column-II |
| A. Strong base | 1. $OH ^{-}$ |
| B. Weak base | 2. $O ^{2-}$ |
| C. Very weak base | 3. $F ^{-}$ |
| D. Very weak acid | 4. $NO _3^{-}$ |
| 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. $HClO _4$ | 1. Very weak base |
| B. $HNO _2$ | 2. Very weak acid |
| C. $OH ^{-}$ | 3. Weak acid |
| D. $ClO _4^{-}$ | 4. Strong acid |