Question

1 Marks-
1. What change in colour is observed when white silver chloride is left exposed to sunlight? State the
type of chemical reaction in this change.
2.What effect does an increase in concentration of H+(aq.) in a solution have on the pH of solution?
3.Name the metal which reacts with a very dilute HNO3 to evolve hydrogen gas.
L. Write the name and formula of the 2nd member of the series of carbon compounds whose general
formula is CnH2n.
5. Why are the elements sodium and chlorine in the same period of the Periodic table?
MULTIPLE CHOICE QUESTION( MCQ)-
6. Which of the following are exothermic processes?
(1) Reaction of water with quick lime
(ii) Dilution of an acid
(iii) Evaporation of water
(iv) Sublimation of camphor (crystals)
(a) (1) and (ii)
(b) (in) and (iii)
(c) (1) and (iv)
(d) (11) and (iv)
7 Lime water reacts with chlorine to give
(a) bleaching powder (6) baking powder
(c) baking soda (d) washing soda
Why does carbon form compounds mainly by covalent bonding?
(a) There are four electrons in the outermost shell of carbon
(b) It requires large amount of energy to form C4+ or C4sup>4
(c) It shares its valence electrons to complete its octet
(d) All the above
Element X forms a chloride with the formula XC12, which is a solid with high melting point
would most likely be in the same group of the periodic table as:
(a) Si
(6) Mg
(c) Al
(d) Na​

Answer 1

Answer:

answers of multiple choice is

6 answer is d

7 is a

8 is a

9 is mg