MEDIUM
10th CBSE
IMPORTANT
Earn 100

Why should both sodium metal and ethanol be dry when they are made to react?

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 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.
 
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
IMPORTANT
NEW ERA CHEMISTRY Textbook for Class X>Chapter 4 - Carbon and its Compounds>MOCK TEST>Q 16
Why are soaps not effective cleansing agents in hard water? Explain.
MEDIUM
10th CBSE
IMPORTANT
NEW ERA CHEMISTRY Textbook for Class X>Chapter 4 - Carbon and its Compounds>MOCK TEST>Q 17
An organic compound A (molecular formula C2H4O2) reacts with Na metal to form a compound B and evolves into a gas which burns with a pop sound'. Compound A on treatment with an alcohol C in the presence of a little concentrated sulphuric acid forms a sweet-smelling compound D (molecular formula C3H6O2). Compound D on treatment with NaOH solution gives back B and C. Identify A, B, C and D.
MEDIUM
10th CBSE
IMPORTANT
NEW ERA CHEMISTRY Textbook for Class X>Chapter 4 - Carbon and its Compounds>MOCK TEST>Q 18
A neutral organic compound X(molecular formula C2H6O) on oxidation with acidified potassium dichromate gives an acidic compound Y. Compound X reacts with Y on warming in the presence of conc. H2SO4 to give a sweet smelling substance Z. What are X, Y and Z?