MEDIUM
10th CBSE
IMPORTANT
Earn 100

Give reason for the following.

Saturated hydrocarbons burn with a blue flame while unsaturated hydrocarbons burn with a sooty flame.

Important Questions on Carbon and its Compounds

MEDIUM
10th CBSE
IMPORTANT
NEW ERA CHEMISTRY Textbook for Class X>Chapter 4 - Carbon and its Compounds>MOCK TEST>Q 12

Give reason for the following.

Carbon does not form C4+ cations and C4- anions.

MEDIUM
10th CBSE
IMPORTANT
NEW ERA CHEMISTRY Textbook for Class X>Chapter 4 - Carbon and its Compounds>MOCK TEST>Q 13
Explain structural isomerism. Write the structural isomers of a saturated hydrocarbon C4H10 and name them.
HARD
10th CBSE
IMPORTANT
NEW ERA CHEMISTRY Textbook for Class X>Chapter 4 - Carbon and its Compounds>MOCK TEST>Q 14
If water contains dissolved calcium hydrogen carbonate, out of soaps and synthetic detergents which one will you use for cleaning clothes?
MEDIUM
10th CBSE
IMPORTANT
NEW ERA CHEMISTRY Textbook for Class X>Chapter 4 - Carbon and its Compounds>MOCK TEST>Q 14
Why should both sodium metal and ethanol be dry when they are made to react?
MEDIUM
10th CBSE
IMPORTANT
NEW ERA CHEMISTRY Textbook for Class X>Chapter 4 - Carbon and its Compounds>MOCK TEST>Q 14
Write the condensed structures of butane, 2-Methylbutane and 2, 3-Dimethylbutane. How are they related to one another?
MEDIUM
10th CBSE
IMPORTANT
NEW ERA CHEMISTRY Textbook for Class X>Chapter 4 - Carbon and its Compounds>MOCK TEST>Q 14
Write the name and molecular formula of an organic compound having its name suffixed with '-ol' and having two carbon atoms in the molecule. With the help of a balanced chemical equation indicate, what happens when it is heated with excess of conc. H2SO4?
HARD
10th CBSE
IMPORTANT
NEW ERA CHEMISTRY Textbook for Class X>Chapter 4 - Carbon and its Compounds>MOCK TEST>Q 15
Soaps are 100% biodegradable i.e., they are completely decomposed by bacteria and microorganisms present in water. Therefore, soaps do not cause any water pollution. On the other hand detergents are not biodegradable. Thus, detergents cause pollution.
Read the above passage and answer the following questions:
(i) What are the advantages of using detergents over soaps for washing purpose.
(ii) Why detergents have higher cleansing power than soaps?
(iii) How can water pollution be prevented by use of non-biodegradable detergents?
MEDIUM
10th CBSE
IMPORTANT
NEW ERA CHEMISTRY Textbook for Class X>Chapter 4 - Carbon and its Compounds>MOCK TEST>Q 16
List the differences between soaps and detergents.