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1201.

……………… is a symbolic representation of a compound.

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SOLUTION :CHEMICAL FORMULA
Discussion
1202.

...................... is a good conductor of heat and electricity and used to make electrodes.

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ANSWER :GRAPHITE
Discussion
1203.

...................... is a colourless, crystalline and purest form of carbon.

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ANSWER :DIAMOND
Discussion
1204.

............... discovered the neutral particles called neutrons.

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SOLUTION :JAMES CHADWICK
Discussion
1205.

{:( , " column A" ,,,"column B"),( A., SO_(3) ,( ),a.," green houseeffect"),(B. ,O_(3) ,( ),b. ," Carbonicacid "),( C.,CO_(2) ,( ),c., "Artificalbreathing "),(D., N_(2)O+O_(2) , ( ) , d. , "Acid rain "),( E., 95% + 5%CO_(2) , ( ) ,e.,"Anesthetic "),(F.,O_(2)+H_(2) , ( ), f., " stratosphere"),( G.,H_(2) O+CO_(2), ( ) , g., " Welding "):}

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Solution :`{:(A:d),(B:f),(C:a),(D:E),(E:c),(F:G),(G:b):}`
Discussion
1206.

…………….. reaction is also known as a substitution reaction.

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SOLUTION :SINGLE DISPLACEMENT
Discussion
1207.

______ can catalyse the reaction between dry chlorine and hydrogen.

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SOLUTION :MOISTURE
Discussion
1208.

____ can be drawn into wires.

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Copper
Phosphorus
Oxygen
Hydrogen

Answer :A
Discussion
1209.

"___________" bacteria convert atmospheric nitrogen into nitrogenous compounds

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SOLUTION :NITROGEN FIXING BACTERIA ( or) SYMBIOTIC
Discussion
1210.

______and ________are required in the preparation of matchstick.

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ANSWER :A::C::D
Discussion
1211.

_________ acts as a catalyst during the hydrogenation of vegetable oils.

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ANSWER :NICKEL
Discussion
1212.

________ acid on reaction with H_(2)SO_(4) gives only carbon monoxide gas.

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ANSWER :FORMIC
Discussion