KENDRIYA VIDYALAYA DANAPUR CANTT (S.S)
FORMATIVE ASSESMENT – 3
SCIENCE (CHEMISTRY)
CLASS – X
SET – II
1. Name the functional group which always occurs in the middle of a carbon
chain.
2. What change will you observe if you test soap with litmus paper (red or blue)?
3. Which of the following hydrocarbons undergo addition reactions ?
C2H6 , C3H8 , C3H6, C2H2, & CH4
4. What is the electron dot formula of C2H6 ?
5. Write the molecular & structural formula of the following (a) Ethanol
(b) Propanal
(c) Propanoic acid
6. Write all possible isomers of hexane.
7. What is meant by denatured alcohol ?
What is the need to denature alcohol ?
8. A compound X is formed by the reaction of carboxylic acid C2H4O2 and an
alcohol in presence of a few drops of H2SO4 . The alcohol on oxidation with
alkaline KMNO4 followed by acidification given the same carboxylic acid as used in
this reaction. Give the names & structure of (a) Carboxylic acid (b) Alcohol (c)
The compound X- Also write the reaction.
KENDRIYA VIDYALAYA DANAPUR CANTT (S.S)
FORMATIVE ASSESMENT – 3
SCIENCE (CHEMISTRY)
CLASS – X
SET – III
1. What is Vinegar ?
2. What is isomerism?
3. What happens when methane is burnt in air?
4. What is the electron dot formula of C2H4?
5. Write the molecular & structural formula of the following –
(a) Methyl ethanoate (b) Propanoic acid (c) Ethanol.
6. Write all possible isomers of pentane.
7. Explain the mechanism of cleaning action of soap?
8. (1) Give a chemical test to distinguish between saturated & unsaturated
hydrocarbon.
(2) What are the products formed when ethanol is burnt in air.
(3) Ethanol is oxidized with chromic anhydride in glacial ethanoic acid.
(4) Ethanol is reacted with conc H2SO4 ?
(5) Ester is hydrolysed with caustic soda.