Question

Hypo is used in photography for *

1 point

(A)developing picture

(B) picture print

(C)colour of pictures

(D)Fixation of pictures

10. oleum is.. *

1 point

(A) castor oil

(B)oil of vitriol

(C)fuming of H2SO4

(D)none of these

11. Among the following, which one is a wrong statement. *

1 point

(a) PH5 and BiCl5 do not exist.

(b) pπ-dπ bonds are present in SO2

(c) SeF4 and CH4 have same shape.

(d) water has v shape.

12. Which one of the following order is correct for the bond dissociation enthalpy of halogen molecule? *

1 point

(a) Br2 > I2 > F2 > Cl2

(b) F2 > Cl2 > Br2 > I2

(c) I2 > Br2 > Cl2 > F2

(d) Cl2 > Br2 > F2 > I2

13. Which is strongest acid in the following: *

1 point

(a) HClO4

(b) H2SO3

(c) H2SO4

(d) HClO3

14. Among the following which is strongest oxidising agent. *

1 point

(a) Br2

(b) I2

(c) Cl2

(d) F2

15. When Cl2 reacts with hot and cone. NaOH, the oxidation number of chlorine changes from. *

1 point

(a) zero to +1 and zero to +5

(b) 0 to -1 and 0 to +5

(c) zero to -1 and zero to +3

(d) 0 to +1 and 0 to -3

16. In the reaction 2A + B → A2B, if the concentration of A is doubled and that of B is halved, then the rate of the reaction will *

2 points

increase 2 times

increase 4 times

decrease 2 times

remain the same

17 . A substance ‘A’ decomposes by a first order reaction starting initially with [A] = 2.00M and after 200min, [A] becomes 0.15M. For this reaction t1/2 is *

2 points

53.72 min

50.49 min

48.45 min

46.45 min

​

Answer 1

Answer:

1.(D) fixation of pictures

2.(C) fumming of H2SO4

3.(D) water has V shape

4.