1. | Electricity is measured through a device called as |
a. | Ammeters |
b. | Voltmeters |
c. | Barometers |
d. | Anemometers |
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Answer: (a).Ammeters
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2. | Any reaction at an anode involves |
a. | gain of electrons |
b. | loss of electrons |
c. | gain or loss depends upon the electrolyte |
d. | formation of gases |
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Answer: (b).loss of electrons
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3. | Aluminum (Al) is preferred in overhead power cables because |
a. | it is a good conductor |
b. | it acts as an insulator, in case of lightening |
c. | it prevents accidents |
d. | it is lighter in weight |
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Answer: (d).it is lighter in weight
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4. | Reactivity series of metals is also called as the |
a. | preferential series |
b. | electrochemical series |
c. | electrolytic series |
d. | selective discharge series |
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Answer: (b).electrochemical series
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5. | If molten Lead Bromide (PbBr₂) is electrolyzed, |
a. | at anode, brown fumes of bromide gas are given off |
b. | at anode, molten lead can be seen |
c. | at cathode, brown fumes can be seen |
d. | at cathode, lead bromide can be seen |
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Answer: (a).at anode, brown fumes of bromide gas are given off
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