Tamil Nadu State Board ( Samacheer Kalvi ) Online Test based on Book Back Questions - 8th Standard Science - English Medium - Carbon And Its Compounds

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Carbon And Its Compounds

Samacheer Kalvi 8th Science - Carbon And Its Compounds - Book Back Questions in English Medium

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Question 1 Of 10

Rectified spirit is an aqueous solution which contains about of ethanol.

95.5% 75.5% 55.5% %

Question 2 Of 10

Which of the following pairs can be the successive members of a homologous series?

C3H8 and C4H10 C2H2 and C2H4 CH4 and C3H6 OH and C4H8OH

Question 3 Of 10

Which of the following are used as anesthetics?

Carboxylic acids Ethers Esters hydes

Question 4 Of 10

The molecular formula of an open-chain organic compound is C3H6. The class of the compound is.

alkane alkene alkyne hol

Question 5 Of 10

TFM in soaps represents the content in soap.

mineral vitamin fatty acid ohydrate

Question 6 Of 10

The secondary suffix used in the IUPAC nomenclature of an aldehyde is.

– ol – oic acid – al one

Question 7 Of 10

The IUPAC name of an organic compound is 3-Methyl butan-1-ol. What type of compound it is?

Aldehyde Carboxylic acid Ketone hol

Question 8 Of 10

C2H5OH + 3O2 → 2CO2 + 3H2O is a .

Reduction of ethanol Combustion of ethanol Oxidation of ethanoic acid ation of ethanol

Question 9 Of 10

Which of the following statements is wrong about detergents?

It is a sodium salt of long-chain fatty acids It is sodium salt of sulphonic acids The ionic part in a detergent is –SO3–Na+ s effective even in hard water.