Chemistry

Radiations are harmful as it:___________?

A. Causes skin cancer

B. Causes anemia

C. Alters body tissue

D. is unstable

The element common to all acids is:__________?

A. Hydrogen

B. Carbon

C. Sulphur

D. Oxygen

Which of the following is used as a lubricant?

A. Graphite

B. Silica

C. Diamond

D. Iron oxide

The natural source of hydrocarbon is:___________?

A. Crude oil

B. Biomass

C. Coal

D. Carbohydrates

The main Constituent of Biogas is__________?

A. Methane

B. Hydrogyn

C. Oxygen

D. Carbin dioxide

In whole Periodic Table which element Is Most Reducing Agent ?

A. Chlorine

B. lithium

C. Helium

D. Neon

Example of gas having monoatomic molecules is ___________ ?

A. Nitrogen

B. Nydrogen

C. Neon and argon

D. Oxygen and nitrogen

Atom was a name given by ____________ ?

A. Democritus

B. Bohr

C. Rutherford

D. Archimedes

Places where the temperature of air is above freezing point of the water, the precipitation will be in the form of ________ ?

A. Hailstorms

B. Thunders

C. Rain

D. Lightning

Places where the temperature of air is below freezing point of the water, the precipitation will be in the form of __________ ?

A. Snow

B. Lightning

C. Hailstorms

D. Thunders