CBSE Class 10 Science Sample Paper 2020 Set D

a) Water

 

b) Carbon dioxide

 

14. What is meant by substitution reaction? What type of hydrocarbons show substitution reaction? Explain with an example.

 

15. Complete the following equations

 

a) CH₃CH₂OH + CH₃COOH→

 

b) CH₃CH₂OH + Na→

 

c) CH₃COOH + Na₂CO₃→

 

16. What happens when ethanol is treated with alkaline potassium permanganate? Identify the type of reaction and write an equation for the same.

 

17. Explain the versatile nature of carbon to form large number of compounds. Also explain why carbon forms strong bonds?

 

18. a) Differentiate between saturated and unsaturated hydrocarbons?

 

b) How are saturated and unsaturated hydrocarbons identified using bromine water?

 

c) Identify unsaturated hydrocarbons from the following and draw their structural formula: C₃H₄,C₃H₆.C₃H₈

 

19. a) What do you understand by functional group?

 

b) Draw the structure of a chloroalkane with three carbon atoms and write its IUPAC name.

 

c) Identify the functional groups in the following and write their IUPAC names

 

i) CH₃CH₂CH₂COOH    ii) CH₃CH₂CH₂ CO CH₃

 

20. a) Explain cleansing action of soap.

 

b) What are isomers? Draw all possible isomers of pentane.