Question

copper
aluminium
Two of the metals, that cannot be stored either in air, or under water, are-
in
1.
sodium and magnesium
calcium and potassium
magnesium and calcium
potassium and sodium
2.
3.
D. Answer the following questions in brief.
Name (i) one metal and (ii) one non-metal which normally exists in the liquid
state.
2.
State the fraction of gold present in an 18 carat gold piece.
3.
State the property of copper wires that makes them useful for electrical fittings.
4.
Define an alloy.
5.
List any two uses of non-metals.
Answer the following questions.
one for the following reactions:​

Answer 1

Answer:

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