Question
| 1. | Insulator | (a) | Coulomb |
| 2. | Conductor | (b) | Electric circuit |
| 3. | Closed path | (c) | Copper |
| 4. | Electric charge | (d) | Rubber |
| 1. | Insulator | (a) | Coulomb |
| 2. | Conductor | (b) | Electric circuit |
| 3. | Closed path | (c) | Copper |
| 4. | Electric charge | (d) | Rubber |
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| Column - I | Column - II | ||
| i | Friction | (a) | Measuring force |
| ii | Spring balance | (b) | Reduce friction |
| iii | Shape of aeroplane | (c) | Nature of surface |
| iv | Lubricants | (d) | Drag |
| v | Fluid friction | (e) | Bird |
| i | The ray that enters the transparent medium | (a) | Violet |
| ii | The ray that comes out from a transparent medium into air | (b) | 0^(@) |
| iii | Speed of light in vacuum | (c) | Emergent ray |
| iv | The angle of incidence for normal incidence | (d) | Incident ray |
| v | The colour that deviates the most | (e) | $3\times10^{8}m/s$ |
| i | Probiotic | (a) | Kuru |
| ii | Preservation | (b) | Methanogen |
| iii | Prion | (c) | Curd |
| iv | Biogas | (d) | Sugar |
| Convex mirror | Radio telescopes |
| Parobolic mirror | Rear – view mirror |
| Snell’s law | Kaleidoscope |
| Dispersion of light | sin i/sin r =μ |
| Refractive index | Rainbow |

| i | Solanum trilobatum | (a) | Fungi |
| ii | Vitamin $B_2$ | (b) | Rhizopus |
| iii | Saprophyte | (c) | Laminaria |
| iv | Fodder | (d) | TB |
| Atom | Building block of matter |
| Element | Atoms of different kinds |
| Compound | Atoms of the same kind |
| Molecule | Smallest unit of a substance |
| 1. | Earthworm | (a) | Flapping |
| 2. | Cockroach | (b) | Setae |
| 3. | Birds | (c) | Slithering |
| 4. | Snake | (d) | Legs |
| i | Silica | (a) | Caustic potash |
| ii | Potassium hydroxide | (b) | Sand |
| iii | Sodium hydroxide | (c) | Calamine |
| iv | Zinc carbonate | (d) | Caustic soda |