EASY
11th CBSE
IMPORTANT
Earn 100

In three moles of ethane , calculate the following:
Number of moles of carbon atoms.
(Only mention the number, not the unit)
(Only mention the number, not the unit)

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Important Questions on Some Basic Concepts of Chemistry
MEDIUM
11th CBSE
IMPORTANT
In three moles of ethane , calculate the following:
The number of moles of hydrogen atoms.

MEDIUM
11th CBSE
IMPORTANT
In three moles of ethane , calculate the following:
The number of molecules of ethane.

MEDIUM
11th CBSE
IMPORTANT
What is the concentration of sugar in if its are dissolved in enough water to make a final volume up to ?
()

MEDIUM
11th CBSE
IMPORTANT
lf the density of methanol is , what is its volume needed for making of its solution?
(Provide correct answer upto two decimal places and no need to mention units).

MEDIUM
11th CBSE
IMPORTANT
Pressure is determined as force per unit area of the surface. The unit of pressure, Pascal is as shown below:
If the mass of air at sea level is . Calculate the pressure in Pascal.

EASY
11th CBSE
IMPORTANT
What is the unit of mass? How is it defined?

EASY
11th CBSE
IMPORTANT
Match the following prefixes with their multiples:
Prefixes | Multiples | |
(i) | Micro | |
(ii) | Deca | |
(iii) | Mega | |
(iv) | Giga | |
(v) | Femto |

EASY
11th CBSE
IMPORTANT
What do you mean by significant figures?
