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Chemistry Past Questions and Answers

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Chemistry Questions

Question 836:

In an electrolytic set-up to protect iron from corrosion, the iron is?

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A Made cathode
B Made anode
C Used with a metal of lower electropositive potential
D Initially coated with tin

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Question 837:

Which of the following is NOT true of metals?

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A They are good conductors of electricity
B They ionize by electron loss
C Their oxides are acidic
D They have high melting points

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Question 838:

Which of the following is the correct order of decreasing activity of the metals Fe, Ca, Al and Na?

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A Fe> Ca> Al> Na
B Na> Ca> Al> Fe
C Al> Fe> Na> Ca
D Ca> Na> Fe>, Al

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Question 839:

Which of the following compounds is NOT an isomers of 2,2 dimethylbutane?

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A 2-methylbutane
B 3-methylpentane
C 2,3-dimethylbutane
D 2-methylpentane

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Question 840:

When sodium is added to ethanol, the products are?

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A Sodium hydroxide and water
B Sodium hydroxide and hydrogen
C Sodium ethoxide and water
D Sodium ethoxide and hydrogen

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