Chemistry
(i) List one property in which hydrogen resembles alkali metals and one property in which hydrogen resembles halogens.
(ii) Also list a property in which hydrogen differs from both alkali metals and halogens.
Answer
(i) Both alkali metals and hydrogen act as reducing agents.
CuO + H2 ⟶ Cu + H2O
CuO + 2Na ⟶ Cu + Na2O
Both halogens and hydrogen are non-metals. They show electronegative character.
H + e- ⟶ H-
F + e- ⟶ F-
(ii) Hydrogen atom has only one shell but alkali metal and halogens have two or more shells.
Related Questions
Give one importance each of dissolved salts and dissolved gases in water.
Give one observation when potassium is added to water. Also give the balanced chemical equation.
(i) State any one reason for discarding 'Law of Octaves'.
(ii) What is periodicity? Explain the cause of periodicity.
How is the lightest gas collected and dried during its laboratory preparation?