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What is the difference between H2 and 2H?

Important Questions on Structure and Nature of Matter

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Science>Chemistry>Structure and Nature of Matter>Chemical Formula
What is the composition of water? In what volume does its elements combine?
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Science>Chemistry>Structure and Nature of Matter>Chemical Formula
Name the elements that water is composed of.
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Science>Chemistry>Structure and Nature of Matter>Chemical Formula

Which elements are present in the following?

CaCO3.

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Science>Chemistry>Structure and Nature of Matter>Chemical Formula
The properties of water are different from the properties of the elements of which it is formed. Discuss.
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Science>Chemistry>Structure and Nature of Matter>Chemical Formula
What is the composition of water?
MEDIUM
Science>Chemistry>Structure and Nature of Matter>Chemical Formula
What is the volume ratio for hydrogen to oxygen in water? 2:1 / 1:2
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Science>Chemistry>Structure and Nature of Matter>Chemical Formula
Water is a compound and not an element.
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Science>Chemistry>Structure and Nature of Matter>Chemical Formula
The atomicity of hydrogen molecule is 2.
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Science>Chemistry>Structure and Nature of Matter>Chemical Formula
The ratio of oxygen to hydrogen in water is 2:1.
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Science>Chemistry>Structure and Nature of Matter>Chemical Formula

Which elements are present in the following?

C6H12O6.

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Science>Chemistry>Structure and Nature of Matter>Chemical Formula
 Name the two gases from which water is formed. What is the chemical composition of these two gases in water? Give the molecular formula of water.
MEDIUM
Science>Chemistry>Structure and Nature of Matter>Chemical Formula
A water molecule consists of hydrogen and oxygen in the ratio,
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Science>Chemistry>Structure and Nature of Matter>Chemical Formula

Which elements are present in the following?

CO2.

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Science>Chemistry>Structure and Nature of Matter>Chemical Formula
Water is a 
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Science>Chemistry>Structure and Nature of Matter>Chemical Formula
What are the elements present in compound of NaOH?
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Science>Chemistry>Structure and Nature of Matter>Chemical Formula
What is the volume ratio of oxygen to hydrogen in water?
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Science>Chemistry>Structure and Nature of Matter>Chemical Formula
Washing soda is -
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Science>Chemistry>Structure and Nature of Matter>Chemical Formula
The correct formula of calcium hydroxide is -
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Science>Chemistry>Structure and Nature of Matter>Chemical Formula

Which elements are present in the following?

P2O5.

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Science>Chemistry>Structure and Nature of Matter>Chemical Formula
The molecular formula of water is