(a) Lithium, sodium, potassium are all metals that react with water to liberate hydrogen gas. Is there any similarity in the atoms of these elements?

(a) Platinum, gold, and silver are used to make jewellery because they are very lustrous. Also, they are very less reactive and do not corrode easily. (b) Sodium, potassium, and lithium...

It is given that: n(S) = 21, n(T) = 32, n(S ∩ T) = 11  We know that: n (S ∪ T) = n (S) + n (T) – n (S...

It is given that: n(X) = 40, n(X ∪ Y) = 60,  n(X ∩ Y) = 10  We know that:  n(X ∪ Y) = n(X) + n(Y) – n(X ∩ Y)  ∴ 60 = 40...

(c) either metals or non-metals 

Ratio of number of moles 1 /1 ∶ 8/ 16  Number of moles = Mass / Atomic mass Number of moles of hydrogen = 1/ 1 = 1  Number of moles of oxygen...

(c) Generally, metals are ductile. However, mercury metal - a liquid at room temperature - cannot be drawn into wires and is not ductile.

(a) False as non metallic oxides are acidic in nature.  (b) True  (c) False as in a displacement reaction more reactive element displaces less reactive metal from its salt.  (d) False as Coal...

It is because HNO3 is a strong oxidising agent. It oxidises the Hq produced to H2O and itself get reduced to any of the oxides of the nitrogen, like NO2, NO,...

Sodium, potassium and lithium are stored under oil to prevent their reaction with oxygen, moisture and carbon dioxide of air so as to protect them as they are highly reactive...

It is given that: n(S) = 21, n(T) = 32, n(S ∩ T) = 11 We know that: n (S ∪ T) = n (S) + n (T) – n (S...