Question
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Answer
- c
- e
- b
- a
- d
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| 1. | Anode | (a) | Conducting solution |
| 2. | Cathode | (b) | Positive terminal |
| 3. | Ions | (c) | Negative terminal |
| 4. | Electrolyte | (d) | Positively or negatively charged |
- Nostoc – (a) Pest
- Bacillus – (b) Cyanobacteria
- Cotton bollworm – (c) Legume
- Rhizobium – (d) Bio-pesticide
| i | Apples | (a) | Oxygen |
| ii | Fatty acids | (b) | Browning |
| iii | Acid rain | (c) | Rancidity |
| iv | Solid camphor | (d) | Air pollution |
Match the following.
| Atom | Building block of matter |
| Element | Atoms of different kinds |
| Compound | Atoms of the same kind |
| Molecule | Smallest unit of a substance |
- Density of pure water – (a) Inflammable air
- Henry Cavendish – (b) Cathode
- Hydrogen – (c) 1 g/cm$^3$
- Negative carbon electrode – (d) Hydrogen
| i | Silica | (a) | Caustic potash |
| ii | Potassium hydroxide | (b) | Sand |
| iii | Sodium hydroxide | (c) | Calamine |
| iv | Zinc carbonate | (d) | Caustic soda |
Match the following.
| Column I | Column II | |
| a) | Static friction | Viscosity |
| b) | Kinetic friction | Least friction |
| c) | Rolling friction | Objects are in motion |
| d) | Friction between the liquid layers | Objects are sliding |
| e) | Sliding friction | Objects are at rest |
| 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 |
- Chandrayaan – 1 – (a) Cosmonaut
- Chandrayaan – 2 – (b) Mars Orbiter
- Mangalyaan – (c) Dr. Mylsamy Annadurai
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