Which of the following is the hardest substance?
Copper Diamond Iron Silicon
When a ray of sunlight enters a dark room , its straight path become visible because of dust particles hanging in the air. It is because light is _________?
Visible Transparent Invisible opaque None of these
Which Gas is used in the preparation of Soft drinks?
Oxygen Carbon dioxide Nitrogen Halogen
Approximately how many Galaxies are there ?
10 Billion Galaxies 100 Billion Galaxies 1000 Billion Galaxies 10000 Billion Galaxies
The autonomic nervous system innervates all of these except?
Cardiac muscles Skeletal muscles Smooth muscles none
The Temperature of the surface of Sun is_______?
5,778 Kelvin 6,778 Kelvin 7,778 Kelvin 778 Kelvin
Which of the following branch of Physics deals with the internal structure of earth?
Biophysics Geophysics Plasma physics Atomic physics
. __________ are called the powerhouses of the cell?
Mitochondria Vesicles Lungs Liver
Oxidation is a chemical reaction involving the
Gain of Electrons Loss of Electrons Gain of Protons Loss of Protons
Bleaching powder contains___________?
Nitrogen Iodine Chlorine Bromine