Vapour pressure of water at 100°C is___________________?

A. 55 mm hg
B. 760 mm hg
C. 355 mm hg
D. 1489 mm hg

Liquid crystal is discovered by __________________?

A. William crooks
B. Fredrack reinitzer
C. J.j thomson
D. Bravis

Hydrogen bonding is involved in____________________?

A. Solubility
B. Cleansing action of detergents
C. Biological molecules
D. All

Forces of attraction which may be present between all kinds of atoms and molecules are _____________________?

A. Intramolecular
B. Intermolecular
C. Van der waal
D. Dipole-induced dipole

what is anthracite?

A. Carbon
B. Hard coal
C. Ammonia
D. None of these

The sky appears blue because the earth’s atmosphere __________?

A. Scatters blue light
B. Reflects blue light
C. Transmits blue light
D. Has actual blue cover

The image formed in a compound microscope is_____________?

A. Erect
B. Inverted
C. Sometimes erect, sometimes inverted
D. None

The lens used in a simple microscope is____________?

A. Concave
B. Convex
C. Cylindrical
D. None

A camera uses a __________ to form an image.

A. Convex lens
B. Concave lens
C. Condenser lens
D. None of these

Who invented the first battery?

A. Alessandro volta
B. Tim berner
C. Rob stothard
D. Georges leclanche