PDF chapter test TRY NOW
1. A non-metal ‘X’ exists in two different forms ‘Y’ and ‘Z. ‘Y’ is hardest natural substance, whereas ‘Z’ is good conductor of electricity. Identify X, Y and Z. Answer: ‘X’ is carbon ‘Y’ is diamond ‘Z’ is graphite.
2. The following reaction takes place when aluminium powder is heated with \(MnO_2\):
\(3MnO_2(s)+4Al(s)→3Mn(l)+2Al_2O_3(l)+Heat\)
a. Is aluminium getting reduced?
b. Is \(MnO_2\) getting oxidized?
b. Is \(MnO_2\) getting oxidized?
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