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Chemical Effects of Electric Current

Fill in the b...

Question

Fill in the blanks with the correct words.
1. Alcohol is a .................... (good/bad) conductor of electricity.
2. Dilute solutions of acids .................... (can/cannot) be used as electrolytes.
3. Positively charged ions are called .................... (anions/cations).
4. Anode mud gets .................... .................... (deposited on/collected below) the anode.
5. The process of .................... (electroplating/electrorefining) can be used to purify metals.

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Solution

Alcohol is a bad conductor of electricity.

Dilute solutions of acids can be used as electrolytes.

Positively charged ions are called cations.

Anode mud gets collected below the anode.

The process of electrorefining can be used to purify metals.

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Q. Assertion :In electrolyte refining of metal, impure metal is made cathode while a strip of pure metal is used as anode. Reason: The pure metal gets deposited at anode as anode mud.

Q. Choosing only words from the following list, write down the appropriate words to fill in the blanks (a) to (e) below: anions, anode, cathode, cations, electrode, electrolyte, nickel, voltameter.
To electroplate an article with nickel requires an (a) ________ which must be a solution containing (b) ________ ions. The article to be plated is placed as the (c) _________ of the cell in which the plating is carried out. The (d) _________ of the cell is made from pure nickel. The ions that are attracted to the negative electrode and discharged are called (e) _________.

Q. (a) What kind of particles will be found in a liquid compound which is a non-electrolyte?
(b) If HX is a weak acid, what particles will be present in its dilute solution apart from those of water?
(c) Cations are formed by __________ (loss/gain) of electrons and anions are formed by ________ (loss/gain) of electrons.
(Choose the correct words to fill in the blanks.)
(d) What ions must be present in a solution used for electroplating a particular metal?
(e) Explain, how electrolysis is an example of redox reaction.

Assertion: Metal ions must be present in a solution used for electroplating a particular metal.

Reason: Electroplating occurs only on anode.

Q. Fill in the blanks with the correct words.
1. The part of an electric bulb that glows is called the ................... (filament/terminal).
2. You will find ammonium chloride paste and powdered manganese dioxide in ................ (a dry cell/an electric switch).
3. Primary cells ................... (can/cannot) be recharged one they are used up.
4. An insulator is a ...................... (bad/good) conductor of electric current.
5. Wood is an example of ................... (a conductor/an insulator).

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