Explain structural isomerism. Write the structural isomers of a saturated hydrocarbon $C_{4} H_{10}$ and name them.

Important Questions on Carbon and its Compounds

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.

H_{2} {SO}_{4}

?

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.

MEDIUM

10th CBSE

IMPORTANT

NEW ERA CHEMISTRY Textbook for Class X>Chapter 4 - Carbon and its Compounds>MOCK TEST>Q 16

Why is common salt added during the preparation of soap?

MEDIUM

10th CBSE