When a beam of white rays is dispersed by a prism which colour will be refracted to a larger extent?

2) The modern atomic mass unit is based on ____

3) What do you mean by photoelectric effect?

4) A raincoat is made of what?

5) What is the value of Planck's constant in SI units?

6) The total number of electrons present in 18 ml of water is ____

7) What is the velocity of light in m/s?

8) Which element on adding to natural rubber makes it less sticky in hot weather and less hard in cold weather?

9) The scientist who introduced the model of the atom similar to the solar system?

10) 3 g of a salt of molecular weight 30 is dissolved in 250 g of water. The molality of the solution is ____

11) What happens when an electron moves nearer to the nucleus of the atom?

12) Which chemical causes Minamata disease?

13) What is molarity?

14) The weight of 1 1022molecules of CuSO4.5H2O is ____

15) What kind of thermometer is used to determine the depression of freezing point?

16) The absence of cobalt in minute quantities in human body causes what?

17) What do you mean by a buffer solution?

18) 27 g of Al will react completely with how many grams of oxygen?

(a) 8 g (b) 16 g (c) 32 g (d) 24 g

19) Which element has no neutrons in it?

20) Which element can easily form chains?

21) What is the fundamental particle present in P - rays?

22) A compound was found to contain nitrogen and oxygen in the ratio 28 gm and 80 gm respectively. The formula of the compound is

(a) NO (b) N2O3(c) N2O5(d) N2O4

23) Give the name of the radioactive isotope of hydrogen:

24) Cement mixed with gravel, sand, and water is called what?

25) What are isotopes?