Question

Fill in the blanks.

(a) Hydrogen is ___ than air.

(b) Hydrogen is ___ soluble in water.

(c) Hydrogen burns with a ___ flame and ___ sound is heard.

(d) A Metal ___ hydrogen in the reactivity series gives hydrogen with ___

(e) Hydrogen reacts with metal oxides to form ___ and ___

(f) Oxidation is the removal of ___ or addition of ___

(g) In redox reactions oxidation and reduction occur ___

Answer 1

(a) Hydrogen is lighter than air.
(b) Hydrogen is sparingly soluble in water.
(c) Hydrogen bums with a oxyhydrogen pale blue ame and pop sound is heard.
(d) A metal sodium hydrogen in the reactivity series gives hydrogen with water.
(e) Hydrogen reacts with metal oxides to form metal and water.
(f) Oxidation is the removal of hydrogen and addition of oxygen.
(g) In redox reaction oxidation and reduction occur simultaneously.