19. A
A gas 'X' is having the following physical properties
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i) Its melting point is - 259.2°C
ii) It is lighter than air
iii) It is prepared by treating zinc granules with hydrochloric acid
1) Nitrogen
2) Hydrogen
3) Oxygen
4) All
Answers
Answer:
Hydrogen
Explanation:
zinc granules react with hydrochloric acid to give zinc chloride and hydrogen
Answer:
The Correct Answer is Hydrogen
Explanation:
Under normal Earth conditions, hydrogen is a colourless, odourless, tasteless, and nonpoisonous gas. It is usually found as a diatomic molecule, which means that each molecule has two hydrogen atoms; that's why pure hydrogen is commonly written as "H2."
The non-metal hydrogen has the molecular symbol H. H2 is the molecular formula for hydrogen. Hydrogen has long been acknowledged as a practical and environmentally friendly fuel. It is ideal for combustion engines in automobiles and can be kept as a compressed gas or a liquid. Hydrogen is a non-toxic and non-carcinogenic element. Coal and water can be used to make hydrogen. It is a necessary component in the manufacture of polyurethane polymers.