A mixture of stream and natural gas passed over a ____ catalyst produces water gas.
a) Copper
b) Nickel
c) Tungsten
d) Zinc
Vinegar is an example _____ in our daily food.
a) Salt
b) Acid
c) Alkali
d) Oil
Latent Heat fusion of ice is:
a) 4.86 x 105 Jkg-1
b) 3.36 x 105 Jkg-1
c) 3.36 x 106 Jkg-1
d) 3.33 x 104 Jkg-1
SI unit of Intensity of light is:
a) Candela
b) Kilogram
c) Kelvin
d) Ampere
To produce mechanical waves, we need a source producing a disturbance and a/an:
a) Inelastic medium
b) Elastic medium
c) Electromagnetic field
d) Vacuum
The distance between the focal point and optical canter is called:
a) Principal axis
b) Principal focus
c) Optical center
d) Focal length
