Carbon and its Compounds Book Back Questions & Answers
Unit 11 > Science > Class 10 > Samacheer Kalvi - English Medium
-
1. The molecular formula of an open chain organic compound is C3H6. The class of the compound is
a. alkane
b. alkene
c. alkyne
d. alcohol
Correct answer: b. alkene
-
2. The IUPAC name of an organic compound is 3-Methyl butan-1-ol. What type compound it is?
a. Aldehyde
b. Carboxylic acid
c. Ketone
d. Alcohol
Correct answer: d. Alcohol
-
3. The secondary suffix used in IUPAC nomenclature of an aldehyde is ____
a. - ol
b. oic acid
c. - al
d. - one
Correct answer: c. - al
-
4. Which of the following pairs can be the successive members of a homologous series?
a. C3H8 and C4H10
b. C2H2 and C2H4
c. CH4 and C3H6
d. C2H5OH and C4H8OH
Correct answer: a. C3H8 and C4H10
-
5. C2H5OH + 3O2 ---> 2CO2 + 3H2O is a
a. Reduction of ethanol
b. Combustion of ethanol
c. Oxidation of ethanoic acid
d. Oxidation of ethanal
Correct answer: b. Combustion of ethanol
-
6. Rectified spirit is an aqueous solution which contains about _______ of ethanol
a. 95.5 %
b. 75.5 %
c. 55.5 %
d. 45.5 %
Correct answer: a. 95.5 %
-
7. Which of the following are used as anaesthetics?
a. Carboxylic acids
b. Ethers
c. Esters
d. Aldehydes
Correct answer: b. Ethers
-
8. FM in soaps represents ___________ content in soap
a. mineral
b. vitamin
c. fatty acid
d. carbohydrate
Correct answer: c. fatty acid
-
9. Which of the following statements is wrong about detergents?
a. It is a sodium salt of long chain fatty acids
b. It is sodium salts of sulphonic acids
c. The ionic part in a detergent is -SO3-Na+
d. It is effective even in hard water.
Correct answer: a. It is a sodium salt of long chain fatty acids
-
1. An atom or a group of atoms which is responsible for chemical characteristics of an organic compound is called ____________.
Correct answer: functional group
-
2. The general molecular formula of alkynes is _____________
Correct answer: CnH2n-2
-
3. In IUPAC name, the carbon skeleton of a compound is represented by _________ (root word / prefix / suffix)
Correct answer: root word
-
4. (Saturated / Unsaturated) ___________ compounds decolourize bromine water.
Correct answer: Unsaturated
-
5. Dehydration of ethanol by conc. Sulphuric acid forms _______ (ethene/ ethane)
Correct answer: ethene
-
6. 100 % pure ethanol is called ____________
Correct answer: absolute alcohol
-
7. Ethanoic acid turns _______ litmus to _________
Correct answer: blue, Red
-
8. The alkaline hydrolysis of fatty acids is termed as _____________
Correct answer: saponification
-
9. Biodegradable detergents are made of _________(branched / straight) chain hydrocarbons
Correct answer: straight
-
1. Functional group -OH
Correct answer: Alcohol
-
2. Heterocyclic
Correct answer: Furan
-
3. Unsaturated
Correct answer: Ethene
-
4. Soap
Correct answer: Potassium stearate
-
5. Carbocyclic
Correct answer: Benzene
-
1. (A): Assertion: Detergents are more effective cleansing agents than soaps in hard water... (R): Reason: Calcium and magnesium salts of detergents are water soluble
A and R are correct, R explains the A.
A is correct, R is wrong.
A is wrong, R is correct.
A and R are correct, R doesnt explains A.
Correct answer: A and R are correct, R explains the A.
-
2. (A): Assertion: Alkanes are saturated hydrocarbons... (R): Reason: Hydrocarbons consist of covalent bonds
A and R are correct, R explains the A.
A is correct, R is wrong.
A is wrong, R is correct.
A and R are correct, R doesnt explains A.
Correct answer: A and R are correct, R doesnt explains A.