MCQ-8

36.If Avogadro number NA ,is changed from 6.022x10^23 mol^-1 to 6.022x10^20 mol^-1,this would change

a) The mass of one mole of carbon

b) The ratio of chemical species to each other in a balanced equation

c)  The ratio of elements to each other in a compound

d)  The definition of mass in units of grams.

   37. Which has the maximum number of molecules among the following?

a)   44 g CO2

b)   48 g O3

c)    8   g H2

d)   64 g SO2

   38. The amount of zinc required to produce 224m  of H2 at STP on treatment with dilute H2SO4 will be

a)   65g

b)   0.065g

c)   0.65g

d)   6.5g

   39. The dimension of pressure are the same as that of

a)   Force per unit volume

b)   Energy per unit volume

c)   Force

d)   Energy

   40. One litre  hard water contains 12.00 mg Mg^2+ 

milli-equivalents of washing soda required to remove its 

hardness is

a)    1

b)   12.16

c)    1x10  -3

d)   12.16x 10 -3

EXPLANATION:

36) Answer:(a)

37) Answer:(c)

38) Answer:(c)

39) Answer:(b)

40) Answer: (a)