43
Carbon is often deposited in the exhaust-pipe of cars because of the?
- A. presence of carbon in petrol
- B. dehydrogenation of petrol
- C. incomplete combustion of petrol
- D. presence of additives in petrol
- E. contamination of petrol with diesel
44
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
45
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
46
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
47
Which of the following solids has a network structure?
- A. Diamond
- B. lodine
- C. Sulphur
- D. Graphite
- E. lron
48
Starch undergoes complete hydrolysis to produce
- A. maltose
- B. lactose
- C. fructose
- D. glucose
- E. sucrose
49
Which of the following separation is routinely applied in the petroleum industry
- A. Filtration
- B. Chromatography
- C. Evaporation
- D. Fractional crystallization
- E. Fractional distillation
50
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(NO3)2 + 2NO2 + 2H2O