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NCERT Solutions for Class 10 English Main Course Book (MCB) Chapter 5



Unit-1 : Solutions of Questions on Page Number : 36


Q1 : Some sub-titles are given below corresponding to each of the paragraphs of the article that you have just read. Match the sub-titles with their paragraphs by writing the number of the paragraph in the space provided.

Subtitles

Paragraph Number

Birth of the first modern drug. _________________
Man’s
hunt for medicinal plants from ancient times.
_________________
Contribution of Greek scholars _________________
Pioneering isolation of compounds _________________
The beginning of a new era of recreation of plant
components with modifications
_________________
Positive effects of new trade and trading routes _________________
The Wonder Tree _________________
Knowledge from ancient Egypt _________________

Answer :

Subtitles

Paragraph Number

Birth of the first modern drug.

7

Man’s hunt for medicinal plants from ancient times.

1

Contribution of Greek scholars

3

Pioneering isolation of compounds

5

The beginning of a new era of recreation of plant
components with modifications

8

Positive effects of new trade and trading routes

4

The Wonder Tree

6

Knowledge from ancient Egypt

2


Q2 : Find words from the passage that mean the same or nearly the same as the following:
(a) filled with a certain quality ( para 1 ) : ————-
(b) scented or perfumed or sweet-smelling (para 2) : —————-
(c) written work dealing with a subject systematically (para 3): ————–
(d) people living at the same time as others (para 5) : —————-
(e) notably large or significant (para 5 ) : —————
Answer :
(a) filled with a certain quality ( para 1 ) : imbued
(b) scented or perfumed or sweet-smelling (para 2) : aromatic
(c) written work dealing with a subject systematically (para 3): treatise
(d) people living at the same time as others (para 5) : contemporaries
(e) notably large or significant (para 6 ) : considerable


Q3 : After the Renaissance, the major shifts that occurred in the approach towards herbal plants were ———————————-

Answer :
After the Renaissance, the major shifts that occurred in the approach towards herbal plants were that scientists and their scientific studies, discoveries and inventions came to the fore. Alchemists’ elixirs and other magical remedies were rejected. Local plants were carefully collected and widely used to make infusions, decoctions and ointments.


Q4 : Isolation of compounds from plants to be used as drugs was the ———————–

Answer :
Isolation of compounds from plants to be used as drugs was the technique developed by the Swedish chemist Carl Wilheim Scheele and his contemporaries in the late 1700s.


Q5 : Complete the following flowchart that traces the contributory processes leading to the development of the first modern drug from the willow tree.

Answer :
(a) salicin, the first major compound, was obtained in 1828
(b) In 1838, the Italian chemist, Raffaele Piria also obtained salicylic acid from the bark by various chemical processes.
(c) In 1853, a French chemist, Charles Frederic Gerhardt, synthesised a modified form of salicylic acid-acetylsalicylic acid.
(d) Felix Hoffman’s contribution of rediscovering Gerhardt’s compound
(d) Bayer decided to market the acetylsalicylic acid as a new drug for pain relief and patented the compound acetylsalicylic acid in 1899.


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