Science

2. At which point do the incident rays parallel to principle axis of the lens meet?
6. What colour do bases give with methyl orange?
7. Name the tube which connects the kidneys to the urinary bladder.
9. Name a circulatory fluid in the human body other than blood.
10. From which organisms is the purple dye, litmus obtained?
12. What is the insoluble substance formed during a double displacement reaction?
14. What is the nature of the image when the magnification is negative?
15. Which substances are added to food containing fats and oils to prevent rancidity?

1. The movement of food in phloem is called:
3. The breakdown of pyruvate to give carbon di-oxide, water and energy takes place in which cell organelle?
4. What is the other name for calcium carbonate?
5. The contraction and expansion movement of the walls of the food pipe is called:
8. Name the phenomenon in which light rays deviate from their straight path when they hit an obstacle such as molecules of gas or dust, water vapors, etc.
11. Name the band of colours, as seen in a rainbow, produced by separation of the components of light by their different degrees of refraction according to wavelength.
13. Name the angled piece of glass which breaks light into colours.