The device used to convert Alternate Current into Direct Current is called?

A. Anemometer
B. Battery
C. Galvanometer
D. Rectifier

In night, when photosynthesis is stopped, plants__________?

A. Take in carbon dioxide
B. Give off oxygen
C. Give off carbon dioxide
D. None of these

A metallic atom loses its valence electron to form a/an _________?

A. An anion
B. A cation
C. An anion – cation
D. None of these​

A body can escape the gravitational pull of the earth if it is thrown up with a velocity of?

A. 25 miles per sec
B. 60 miles per sec
C. 7 miles per sec
D. 10 miles per sec

Father of Homeopathy is__________?

A. Samuel hahnemann
B. Robert dover
C. Hakeem suleman
D. Dr anwaar khan

Atom is the smallest particall which is_________?

A. Indivisible
B. Divisible
C. Both
D. Non of these

Mycology is a study of_______?

A. Virus
B. Bacteria
C. Anti virus
D. Fungi

__________ is one of the allotropic modifications of carbon.

A. Silicon
B. Diamond
C. Iodine
D. Graphite

When the radiation of light is passed through a prism, it undergoes __________?

A. Reflection
B. Interference
C. Diffraction
D. Refraction

Petra means ______ ?

A. Petrol
B. Sediment
C. Rock
D. Fuel