1.

Fill in the blanks:(a) Hydrogen is...............than air.(b) Hydrogen is.................... soluble in water.(c) Hydrogen bums with a.............. flame and............... sound is heard.(d) A metal sodium hydrogen in the reactivity series gives hydrogen with............. (e) Hydrogen reacts with metal oxides to form...............and............... (f) Oxidation is the removal of hydrogen and addition of............ (g) In redox reaction oxidation and reduction occur................

Answer»

(a) Hydrogen is lighter than air.

(b) Hydrogen is sparingly soluble in water.

(c) Hydrogen bums with an oxyhydrogen pale blue flame 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.



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