HNB STUDY CIRCLE

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HNB STUDY CIRCLE

CH 14 CHEMICAL EFFECTS OF ELECTRIC CURRENT

Question 1.Which of the following is a bad conductor of electricity?

1 point

(a) Distilled water

(b) Silver nitrate

(d) Copper sulphate

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Question 2.Which of the following does not conduct electricity?(a) Sugar solution

1 point

(a) Sugar solution

(b) Vinegar solution

(d) Caustic soda solution

Clear selection

Question 3.An electric current can produce

1 point

(a) heating effect

(b) chemical effect

(d) all of these

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Question 4.Pure or distilled water is a

1 point

(a) poor conductor

(b) good conductor

(d) none of these

Clear selection

Question 5.Which of the following is a good conductor?

1 point

(a) poor conductor

(b) good conductor

(d) none of these

Clear selection

Question 6.Polythene is

1 point

(a) a conductor

(b) an insulator

(d) none of these

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Question 7.Electroplating is based on

1 point

(a) heating effect of electricity

(b) chemical effect of electricity

(d) magnetic effect of electricity

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Question 8.Copper is

1 point

(a) a good conductor

(b) an insulator

(d) none of these

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Question 9.Waste from an electroplating factory must be disposed off

1 point

(a) in the nearby river

(b) in the nearby pond

(d) according to the disposal guidelines of Waste Management Bodies

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Question 10.An electrolyte is

1 point

(a) a metal

(b) a liquid that conducts current

(d) none of these

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Question 11.Flow of electron is called

1 point

(a) electrolyte

(b) electroplating

(d) electric current

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Question 12.Which is not a non-electrolyte?

1 point

(a) Ethyl alcohol

(b) Sodium chloride

(d) Sodium solution

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Question 13.An electric lamp glows due to

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(a) heating effect

(b) magnetic effect

(d) physical effect

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Question 14.Electroplating prevents

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(a) corrosion

(b) passing of current

(d) shining

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Question 15.Which of the following is not used for electroplating metal articles?

1 point

(a) Nickel

(b) Silver

(d) Sodium

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Question 16.Iron objects can be protected by electroplating them with

1 point

(a) chromium

(b) nickel

(d) all of these

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Question 17.Electric poles are coated with a layer of which metal?

1 point

(a) Chromium

(b) Zinc

(d) Aluminium

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Question 18.Which of the following is a good conductor of electricity?

1 point

(a) Distilled water

(b) Cooking oil

(d) Sugar solution

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Question 19.Chemical effects of electric current are primarily used for which of the following?

1 point

(a) Electroplating

(b) Separating oxygen

(d) Separating gold

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Question 20.Which of the following will work the best as a tester for electric current?

1 point

(a) Bulb

(b) LED

(d) Magnetic compass

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