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Chemistry Past Questions and Answers

Neco Chemistry Questions

Question 46:

What mass of silver is deposited when a current of 2.6 A is passed through a solution of a silver salt for 40 minutes? [Ag= 108 ; F=96500C]

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A 6.89g
B 6.93g
C 6.98g
D 7.04g
E 7.12g

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Question 47:

An atom of element X has an electronic configuration of \( 1s^22p^33s^23p^2. \) In which group of the periodic table is X?

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A \( \text{0} \)
B 2
C 3
D 4
E 5

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Question 48:

Which metal is a constituent of both bronze and solder?

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A Copper
B Lead
C Silver
D Tin
E Zinc

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Question 49:

What change will occur during the electrolysis of brine using carbon electrodes?

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A Chlorine will be given off at the cathode
B Oxygen gas will be given off at the anode
C Sodium will be deposited at the cathode
D The resulting solution, after electrolysis, will be acidic.
E The volumes of hydrogen and chlorine given off during the same time are equal

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Question 50:

Which metal bromide is widely used in photography?

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A Calcium bromide
B Magnesium bromide
C Potassium bromide
D Silver bromide
E Sodium bromide

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