Short Answer TypeGlucose on reaction with HI gives n-hexane. What does it suggest about the structure of glucose?
The reaction of glucose with HI giving n-hexane suggests that all the six carbon atoms are linked in a straight chain, as shown in the reaction given below:
CHO-(CHOH)4-CH2OH 
CH3-CH2-CH2-CH2-CH2-CH2
After the ban on plastic bags, students of a school decided to make people aware of the harmful effects of plastic bags on the environment and Yamuna River. To make the awareness more impactful, they organised a rally by partnering with other schools and distributed paper bags to vegetable vendors, shopkeepers and departmental stores. All the students pledged not to use polythene bags in the future to save the Yamuna River.
After reading the above passage, answer the following questions:
<(i) What values are shown by the students?
(ii) What are bio-degradable polymers? Give one example.
(iii) Is polythene a condensation or an addition polymer ?
(a) Write the mechanism of the following reaction :
CH3-CH2-OH 
CH3-CH2-Br + H2O
(b) Write the equation involved in Reimer-Tiemann reaction.
Give simple chemical tests to distinguish between the following pairs of compounds:
(i) Benzaldehyde and Benzoic acid
(ii) Propanal and Propanone
Account for the following:
(i) CH3CHO is more reactive than CH3 COCH3 towards reaction with HCN.
(ii) The carboxylic acid is a stronger acid than phenol.
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