Question
What is artificial insemination? Give its uses.
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A body of 2kg falls from rest. What will be its kinetic energy during the fall at the end of 2s? (Assume g = 10m/s2)
Describe general characteristics of phylum Annelida. Give one example each class of Annelida.
Complete the following crossword puzzle (Figure) by using the name of the chemical elements. Use the data given in the table following.
Across | Down | ||
2. | The element used by Rutherford during his $\alpha$–scattering experiment. | 1. | A white lustrous metal used for making ornaments and which tends to get tarnished black in the presence of moist air. |
3. | An element which forms rust on exposure to moist air. | 4. | Both brass and bronze are alloys of the element. |
5. | A very reactive non–metal stored under water. | 6. | The metal which exists in the liquid state at room temperature. |
7. | Zinc metal when treated with dilute hydrochloric acid produces a gas of this element which when tested with burning splinter produces a pop sound. | 8. | An element with symbol Pb. |

For increasing production, What is common in poultry, fisheries and bee-keeping?