Setting of curd is promoted by____________.

a) Yeast b) Virus c) Lacto bacillus d) Rhizobium

AIDS is caused by_________________.

a) Bacteria b) Virus c) Yeast d) Algae

The following is an antibiotic.

a) Sodium bi carbonate b) Streptomycin c) Alcohol d) Yeast

The process of conversion of Sugar into Alcohol is called____________.

a) infection b) fermentation c) moulding d) nitrogen fixation

Which of the following element will form basic oxides?

a) Sulphur b) Nitrogen c) Sodium d) Carbon

Name the metal present in the hoemoglobin of blood.

a) Cu b) Fe c) N₂ d) Na

Name non metal which is stored in water.

a) Phosphorous b) Sulphur c) Chlorine d) Bromine

________________ is an example of metalloid.

a) Germanium b) Calcium c) Carbon d) Aluminium

The smallest unit of an element is called_______________.

a) atom b) molecule c) compound d) none of the above

Choose the best fire extinguisher.

a) Oxygen b) Water c) Carbon dioxide d) Blanket