There are 3 unknown metals-A, B and C. C displaces B from its oxide while with oxide of A, there is no reaction. Give the reactivity order of A, B and C.
Metals
Non–metals
1.
Metals can lose electrons easily.
1.
Non-metals cannot lose electrons easily.
2.
Metals cannot gain electrons easily.
2.
Non-metals can gain electrons easily.
3.
Metals generally form ionic compounds.
3.
Non–metals generally form covalent compounds.
4.
Metals...
(i) Ionisation enthalpy: The first ionisation enthalpies of alkaline earth metals are higher than those ) of alkali metal because of increased nuclear charge, However 2nd ionisation enthalpies of alkaline...
Thermal stability: -
Carbonates: - The carbonates of alkali metals except lithium carbonate are stable towards heat. The carbonates of alkaline earth metals and Lithium carbonate decompose on heating to form...
(a) Alloys of metals usually have greater resistivity than that of their constituent metals.
(b) Alloys usually have lower temperature coefficients of resistance than pure metals.
(c) The resistivity of the alloy,...
