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Jamb Chemistry Past Questions and Answers

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Jamb Chemistry Past Questions

Question 261:


Cotton is almost pure?

A. Starch
B. Protein
C. Animal fibre
D. Celluose
E. Mineral fibre


Question 262:


Which of the following types of reactions takes place between C2H4 and the halogens?

A. Substitution
B. Polymerization
C. Addition
D. Saponification
E. Oxidation


Question 263:


The product formed at the the cathode during the electrolysis of sodium chloride solution with carbon electrodes is?

A. Sodium
B. Chlorine
C. Hydrogen
D. Sodium hydroxide
E. Oxygen


Question 264:


Sodium carbonate crystals on exposure to a dry atmosphere change to a white powder. This phenomenon is known as?

A. Deliquescence
B. Hygroscopy
C. Oxidation
D. Efforescence
E. Sublimation


Question 265:


Which of the following statements is incorrect?

A. Calcium reacts with water to form calcium
B. Magnesium reacts very slowly with water but faster with warm water
C. Iron will not react with water in the absence of air
D. Sodium reacts with water
E. Copper reacts with steam






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