EASY
11th CBSE
IMPORTANT
Earn 100

If 10 volumes of dihydrogen gas reacts with five volumes of dioxygen gas, how many volumes of water vapour would be produced?

Important Questions on Some Basic Concepts of Chemistry

EASY
11th CBSE
IMPORTANT
Textbook for Class XI Chemistry Part I>Chapter 1 - Some Basic Concepts of Chemistry>EXERCISES>Q 1.27
Convert the following into basic units:
28.7pm
 
EASY
11th CBSE
IMPORTANT
Textbook for Class XI Chemistry Part I>Chapter 1 - Some Basic Concepts of Chemistry>EXERCISES>Q 1.27

Convert the following into basic units:

15.15 pm

EASY
11th CBSE
IMPORTANT
Textbook for Class XI Chemistry Part I>Chapter 1 - Some Basic Concepts of Chemistry>EXERCISES>Q 1.27

Convert the following into basic units:

25365 mg

MEDIUM
11th CBSE
IMPORTANT
Textbook for Class XI Chemistry Part I>Chapter 1 - Some Basic Concepts of Chemistry>EXERCISES>Q 1.28
Which one of the following will have the largest number of atoms?
(i) 1g Aus
(ii) 1g Nas
(iii) 1g Lis
(iv) 1g Cl2(g)
HARD
11th CBSE
IMPORTANT
Textbook for Class XI Chemistry Part I>Chapter 1 - Some Basic Concepts of Chemistry>EXERCISES>Q 1.29
Calculate the molarity of a solution of ethanol in water, in which the mole fraction of ethanol is 0.040.
(Assume the density of water to be one).
(Provide correct answer upto 2 decimal places and no need to mention units.)
EASY
11th CBSE
IMPORTANT
Textbook for Class XI Chemistry Part I>Chapter 1 - Some Basic Concepts of Chemistry>EXERCISES>Q 1.3
What will be the mass of one C12 atom in g?
EASY
11th CBSE
IMPORTANT
Textbook for Class XI Chemistry Part I>Chapter 1 - Some Basic Concepts of Chemistry>EXERCISES>Q 1.31
How many significant figures should be present in the answer of the following calculations?
0.02856×298.15×0.1120.5785
 
EASY
11th CBSE
IMPORTANT
Textbook for Class XI Chemistry Part I>Chapter 1 - Some Basic Concepts of Chemistry>EXERCISES>Q 1.31

How many significant figures should be present in the answer of the following calculations?

5×5.364