| Column A | Column B | ||
| (a) | Highly reactive metals | 1. | Oxides are broken by direct heating. |
| (b) | Moderately reactive metals | 2. | Occur in free state. |
| (c ) | Hg and Ag | 3. | Extracted by reduction using suitable reducing agents. |
| (d) | Pt and Au | 4. | Extracted by electrolytic reduction. |
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| Column A | Column B | ||
| (a) | Molar Mass | 1. | 6.022 × 1023 particles/mol |
| (b) | Avogadro's Number | 2. | Simplest whole-number ratio of elements in a compound |
| (c ) | Empirical Formula | 3. | The maximum amount of product that can be formed from the given reactants |
| (d) | Molecular Formula | 4. | The mass of one mole of a substance |
| 5. | The actual formula of a molecule showing the number of atoms of each element | ||
| Column I | Column II |
| (i) $P(NO_3)_2$ from $PbO$ (ii) $MgCl_2$ from $Mg$ (iii) $FeCl_3$from $Fe$ (iv) $NaNO_3$ from $NaOH$ (v) $ZnCO_3$ from $ZnSO_4$ |
(A) Simple displacement (B) Titration (C) Neutralisation (D) Precipitation (E) Combination |
| Column A | Column B |
 | 1. Conc. Sulphuric acid |
| 2. Water | |
| 3. Ethyl alcohol | |
| 4. Copper | |
| 5. Methane |
| Column A | Column B |
| (1) Acid Salt | (a) Ferrous ammonium sulphate |
| (2) Double Salt | (b) Contains only ions |
| (3) Ammonium hydroxide solution | (c) Sodium hydrogen sulphate |
| (4) Dilute hydrochloric | (d) Contains only molecules |
| (e) Contains ions and molecules |
| Column A | Column B |
| (1) Acid salt | (a) Sodium potassium carbonate |
| (2) Mixed salt | (b) Alum |
| (3) Complex salt | (c) Sodium carbonate |
| (4) Double salt | (d) Sodium zincate |
| (e) Sodium hydrogen carbonate |
| Column A | Column B |
| (a) Boiling point of liquid HCl | 1. Orange to Pink |
| (b) Melting point of liquid HCl | 2. Pink to colourless |
| (c) Effect of HCl on litmus solution | 3. -85°C |
| (d) Effect of HCl on methyl orange solution | 4. Blue to Red |
| 5. -115°C |
| Column A | Column B |
| (1) Covalent compound | (a) Methane (CH4) |
| (2) Non-polar | (b) Sodium chloride $( NaCl )$ |
| (3) Polar | (c) Chloride ion ( $Cl -$ ) |
| (4) Electrovalent compound | (d) Carbon dioxide (CO2) |
| (e) Hydrogen chloride ( HCl ) |
| Column A | Column B |
| (a) Sodium chloride | 1. Increases |
| (b) Ammonium ion | 2. Decreases |
| (c) Electronegativity across the period | 3. Ionic bond |
| (d) Non-metallic character down the group | 4. Covalent and Coordinate bond |
| Column A | Column B |
 | (1) No change in colour of litmus paper |
| (2) Litmus paper turns to blue | |
| (3) Litmus paper turns to red | |
| (4) Litmus paper turns to green |
