46) Which one of the following is not a mixture—
a) air
b) mercury
c) milk
d) cement
47) What is the total population of india in crores according to 2001 Census?
a) 68
b) 84
c) 94
d) 102.70
48) In which one of year ’’Rolling Plan’’ was in operation in India?
a) 1968-69
b) 1978-79
c) 1988-89
d) 1990-91
49)The disease that is caused by virus is
a) Typhoid
b) Cholera
c) Common cold
d) Malaria
50)Which gas is used for converting vegetable oils into saturated fats?
a) H2
b) o2
c) Cl2
d) So2
Thank You!!