Jamb 1993 Chemistry Past QuestionsQuestion 46:The IUPAC nomenclature for the compound above is A. Dimethlhexane B. 3,5 dimethylhexane C. 1.1 dmethyl, 3 methylpentane D. 2.4 dimethylhexane Question 47:The function of the copper (ll)tetraoxosulphate (IV) in dilute H2SO4 in the figure above is to A. Dry the gas B. Absorb phosphine impurity C. Absorb ethene impurity D. From an acetylide with ethyne Question 48:The dissolution of common salt in water is a physical change because A. The salt can be obtained by crystallization B. The salt can be recovered by the evaporation of water C. Heat is not generated during mixing D. The solution will not boil at 100oC Question 49:At 25oC and 1atm, a gas occupies a volume of 1.50dm3. What volume will it occupy at 100oC and 1atm? A. 1.88 dm3 B. 6.00 dm3 C. 18.80 dm3 D. 18.80 dm3 E. 60.00dm3 |
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