Question
| 1. | Bulb | (a) | Conductor |
| 2. | Electroplating | (b) | Insulator |
| 3. | Pure water | (c) | Heating effect of current |
| 4. | Salt solution | (d) | Chemical effect of current |
| 1. | Bulb | (a) | Conductor |
| 2. | Electroplating | (b) | Insulator |
| 3. | Pure water | (c) | Heating effect of current |
| 4. | Salt solution | (d) | Chemical effect of current |
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| 1. | Oxygen | (a) | Carbon dioxide |
| 2. | Azote | (b) | Nitrogen |
| 3. | Solvay process | (c) | Vital life |
| 4. | Gun powder | (d) | No life |
| 1. | Earthworm | (a) | Flapping |
| 2. | Cockroach | (b) | Setae |
| 3. | Birds | (c) | Slithering |
| 4. | Snake | (d) | Legs |
| 1. | Humerus | (a) | Fore arm |
| 2. | Radius | (b) | Leg |
| 3. | Tarsals | (c) | Upper arm |
| 4. | Atlas | (d) | vertebral column |
| Spoilage | Decomposition |
| Ozone | Biocatalyst |
| Tarnishing | Oxygen |
| Yeast | Chemical reaction |
| Calcium oxide | Food |
| Universal solvent | Water pollutant |
| Hard water | Kills germs |
| Boiling | Ozonisation |
| Sterilization | Water |
| Sewage | Stomach ailments |
| Nitrogen-fixing bacteria | Vaccine |
| Tuberculosis | Prion |
| Kuru | Lactobacillus acidophilus |
| Probiotics | Bacteria |
| Edward Jenner | Rhizobium |
| Law of conservation of mass | Sir William Crookes |
| Law of constant proportion | James Chadwick |
| Cathode rays | Joseph Proust |
| Anode rays | Lavoisier |
| Neutrons | Goldstein |
| Column - I | Column - II | ||
| i | Friction produces | (a) | Ceiling fan |
| ii | Lubricants | (b) | Heat |
| iii | Soapy floor | (c) | Oil and grease |
| iv | Ball bearing | (d) | Rolling friction |
| v | Wheels | (e) | Less the friction |