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10Hydrogen is the lightest gas found in the universe.
Hydrogen gas has a smell.
Pure zinc reacts very fast with dilute hydrochloric acid.
Hydrogen gas is collected by downward displacement of water.
Hydrogen turns blue litmus red.
Hydrogen liquefies at −253°C.
Hydrogen reacts with oxygen to form water.
The pop sound confirms the presence of oxygen gas.
Hydrogen is used in the manufacture of ammonia.
Reduction reaction involves removal of oxygen from metallic oxide.
Percentage: 0%
Who discovered that hydrogen is a combustible gas?
Hydrogen is collected over water because it is:
Which metal is commonly used to prepare hydrogen in laboratory?
The sound produced when hydrogen burns is:
Which compound is formed when hydrogen reacts with sulfur?
The density of hydrogen gas is about:
Hydrogen reacts with nitrogen to produce:
Hydrogen reduces which of the following?
Hydrogen becomes solid at about:
Metal and water is formed when dry hydrogen is passed into hot metallic oxide. What is this process called?
The symbol of hydrogen is ______.
The atomic number of hydrogen is ______.
Hydrogen was named by ______.
Hydrogen gas is prepared in the laboratory using ______ and dilute hydrochloric acid.
Hydrogen gas is ______ in nature.
The molecular formula of ______ gas is H₂.
The process of adding hydrogen to vegetable oil is called ______.
The flame produced by ______ hydrogen with oxygen is called oxy−hydrogen flame.
Hydrogen is used as a fuel in ______.
The reaction between hydrogen and oxygen produces ______.