Chemistry - Study Mode
[#371] Iron filings can be separated from a heterogeneous mixture using the technique of :
Correct Answer
(B) Magnetization
Explanation
Solution: The method of separation using magnets is used when one of the components is magnetic. So the heterogeneous mixture of iron filings and some other material (such as sulphur powder) can be separated by using magnets. Similarly, a mixture of sand and iron filings can be separated by magnet.
[#372] Electric bulbs are filled with :
Correct Answer
(C) Argon
Explanation
Solution: Filling a bulb with an inert gas such as argon or nitrogen slows down the evaporation of the tungsten filament compared to operating it in a vacuum.
[#373] The most abundant inert gas in the atmosphere is
Correct Answer
(C) Argon
Explanation
Solution: The most abundant inert gas in the atmosphere is Argon.
[#374] Chemical name of common salt is
Correct Answer
(A) Sodium Chloride
Explanation
Solution: Chemical name of common salt is Sodium Chloride.
[#375] Nitrogen forms a variety of compounds in all oxidation states ranging from
Correct Answer
(A) –3 to +5
Explanation
Solution: Nitrogen forms a variety of compounds in all oxidation states ranging from –3 to +5.