Copper metal will react with concentrated trioxonitrate (V) acid to give?

A. Cu(NO₃)₃ + NO + N₂O₄ + H₂O

B. Cu(NO₃)₂ + NO + H₂O

C. CuO + NO₂ + H₂O

D. Cu(NO₂)₃ + NO₂ + H₂O

Which of the following separation is routinely applied in the petroleum industry

A. Filtration

B. Chromatography

C. Evaporation

D. Fractional crystallization

E. Fractional distillation

Starch undergoes complete hydrolysis to produce

A. maltose

B. lactose

C. fructose

D. glucose

E. sucrose

Which of the following solids has a network structure?

A. Diamond

B. lodine

C. Sulphur

D. Graphite

E. lron

Trioxosulphate (lV) acid is not stored for a long period because it

A. is a weak dibasic acid

B. has bleaching properties

C. is unstable and eaily decomposed

D. smells strongly of sulphur (lV) oxide

E. can act as a germicide

Alkanes are used mainly

A. in the production of plastics

B. as domestic and industrial fuels

C. in the textile industry

D. in the hydrogenation of oils

E. as fine chemicals

Which of the following pairs illustrates isotopy?

A. But-l-ene and but -2-ene

B. Ortho-hydrogen and parahydrogen

C. Oxygen and ozone

D. Hydrogen and deuterium

E. Alpha-particle and beta-particle