CBSE Class 10 Science Carbon and Its Compounds Assignment

Question : Match the following with the correct response: 
 Ma-13
 
a. 1-D, 2-A, 3-C, 4-B
b. 1-C, 2-B, 3-D, 4-A
c. 1-B, 2-D, 3-A, 4-C
d. 1-A, 2-C, 3-B, 4-D
Answer : A
Explanation: NaCl has ionic bonds between the sodium ion and the chlorine ion. Ammonia has polar covalent bonds between nitrogen atom and hydrogen atoms. Nitrogen molecule has non-polar covalent bonds between the two nitrogen atoms since the two atoms are alike. C60 is a member of fullerenes (Allotropes of carbon). Buckminsterfullerene contains a cluster of 60 carbon atoms joined together to form spherical molecules.
 
 
Question : Diamond is not a good conductor of electricity because: 
a. It is not soluble in water.
b. It is very hard.
c. It has no free electrons to conduct electric current.
d. Its structure is very compact.
Answer : C
 
Explanation: Diamond is not a good conductor of electricity because it has no free electrons in its structure (like graphite) to conduct electric current.
 
 
Question : Substance ‘X’ is formed by the reaction of carboxylic acid and alcohol. It is used in making ice creams, cold drinks, perfumes and in flavoring agent. Name ‘X’. 
a. Aldehyde
b. Alkyne
c. Ester
d. Ketone
Answer : C
 
Explanation: Substance X is an ester. The reaction in which a carboxylic acid combines with an alcohol to form an ester is called esterification. Some volatile esters with characteristic odours are used in synthetic flavours, perfumes, and cosmetics. Certain volatile esters are used as solvents for lacquers, paints, and varnishes; large quantities of ethyl acetate and butyl acetate are commercially produced for this purpose.
 
 

Very Short Answers

 
Question : Would you be able to check if water is hard using a detergent? 
Answer :  No, we can't check whether the water is hard or soft using a detergent. 
 
Question : What are constituents of an antifreeze? 
Answer :  Ethylene glycol or ethanol is used as an antifreeze.

Short Answers

 
Question : Write the name and chemical formula of the simplest organic acid. 
Answer :  Formic acid is the simplest organic acid.
Ma-15
 
Question : Give names of the following: 
(a) An aldehyde derived from ethane
(b) Ketone derived from butane
(c) Compound obtained by the oxidation of ethanol by chromic anhydride
Answer :
Ma-16
 

Long Answers

 
Question : An organic compound A is widely used as a preservative in pickles and has a molecular formula C2H4O2. This compound reacts with ethanol to form a sweet smelling compound B.
i. Identify the compound A.
ii. Write the chemical equation for its reaction with ethanol to form compound B.
iii. How can we get compound A form B?
iv. Name the process and write corresponding chemical equuation.
v. Which gas is produced when compound A reacts with washing soda? Write the chemical equation. 
Answer :
i. A is ethanoic acid (CH3COOH). Commonly, known as acetic acid. Its 5 % solution in water is used to prepare vinegar, which is used as preservatives for pickles.
Ma-17

 


Click for more Biology Study Material

Latest NCERT & CBSE News

Read the latest news and announcements from NCERT and CBSE below. Important updates relating to your studies which will help you to keep yourself updated with latest happenings in school level education. Keep yourself updated with all latest news and also read articles from teachers which will help you to improve your studies, increase motivation level and promote faster learning

CBSE OMR Sheet Guidelines for Term 1

You are aware that the CBSE will be using OMR for the first time for assessment of both the Classes-X and XII in Term-I examinations. Hence, there is a need that all the students appearing in the Term-l examinations and the schools sponsoring these students should have...

National Youth Day and Birth Anniversary of Swami Vivekananda

Ministry of Education, Govt. of India vide D.O No. 12-4/2021-IS.4 dated 04.01.2022 intimated that 12 January 2022 will be celebrated as “National Youth Day” and “Birth Anniversary of Swami Vivekananda”.   All Schools affiliated to CBSE may celebrate 12 January 2022 as...

CBSE Science Challenge 2021 22

Science is inexplicably linked with our lives and helps us to understand the world around us better. Scientific and technological developments contribute to progress and help improve our standards of living. By engaging with this subject, students learn to think, solve...

Board Exams Date Sheet Class 10 and Class 12

Datesheet for CBSE Board Exams Class 10  (Scroll down for Class 12 Datesheet) Datesheet for CBSE Board Exams Class 12

CBSE Reading Challenge

The acquisition of 21st century competencies of communication, critical and creative thinking and the ability to locate, understand and reflect on various kinds of information has become more crucial for our learners. It is well accepted that Reading Literacy is not...

CBSE Term 2 Board Examinations

CBSE vide Circular No.Acad-51/2021 dated 5th July, 2021, notified that in the session 2021-2022, Board Examinations would be conducted in two terms, i.e.. Term I and Term II. This decision was taken due to the uncertainty arising out of COVID 19 Pandemic. Term I...