DELSU: Pls can anyone help me with d right answers to these:-2016/2017 JAMB POSSIBLE/LIKELY QUESTION...

DELSU: Pls can anyone help me with d right answers to these:-2016/2017 JAMB POSSIBLE/LIKELY QUESTION & ANSWERS ON CHEMISTRY
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1. In a chemical reaction, the change in the concentration of a reactant with time is
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a. rate of reaction
b. order of reaction
c. enthalpy of reaction
d. entropy reaction
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2. 200cm3 of a gas at 250oC exerts a pressure of 700 mmHg. Calculate its pressure if its volume increases to 350cm3 at 75oC.
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a. 467.11 mmHg
b. 400.00 mmHg
c. 1430.54 mmHg
d. 342.53 mmHg
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3. Ethyne is passed through a hot tube containing organo-nickel catalyst to produce
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a. ethanol
b. benzene
c. polythene
d. isoprene
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4. Beryllium and aluminium have similar properties because they
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a. belong to the same period
b. are positioned diagonally to each other
c. belong to the same group
d. are both metals
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5. The Mathematical expression of Ph is
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a. log10 H3O+
b. log10 1/0H-
c. log10 1/H3O+
d. log10 0H-
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6. On exposure to the atmosphere, a hydrated salt loses its water of crystallization to become anhydrous. This phenomenom is reffered to as:
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a. hygroscopy
b. hydrolysis
c. deliquescence
d. efflorescence
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7. The nitrogen obtained from air has a density higher than the one from nitrogen-containing compounds because the one from air is contaminated with?
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a. rare gas
b. carbon [iv] oxide
c. oxygen
d. water vapour
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8. Zn[s] + CUSO4[aq] --------> ZnSO4[aq] + Cu[s]
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a. +1 to +2
b. +1 to + Â±3
c. 0 to +2
d. 0 to + 4
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9. The process of converting starch to ethanol is
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a. cracking
b. fermentation
c. oxidation
d. distillation
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10. In the electrolytic extraction of calcium chloride, the cathode is
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a. zinc
b. platinum
c. iron
d. graphite?

In Chemistry
4 Answers Available
Asked by Qwinfab on 10th February, 2016