Page 26 - ICSE Chemistry 6

D. Match the columns.
Column A Column B
1. Alchemy (a) Cosme c

2. Silk (b) Food preserva ve
3. Talcum powder (c) Philosopher’s stone
4. Cheese (d) Treat moderate pain
5. Sodium benzoate (e) Natural fi bre

6. Aspirin (f) Processed food

SHORT AND PRECISE

A. Show the given text in the form of fl owcharts.
1. Alchemy 2. Benefi ts of chemistry

B. Give reasons for the following statements.
1. Science is both a body of knowledge as well as a con nuous ongoing process.
2. Chemistry is of vital importance and plays a fundamental role in all aspects of life.
3. Alchemy is considered of importance.

4. Chemistry plays a signifi cant role in the development of cosme cs.
C. Answer in short.
1. State the main aim of alchemy.
2. How did Mendeleev use the modern periodic table of elements?

3. What are food preserva ves?
4. Why do we use sugar and salt o en to preserve food?
5. What are processed foods? Give examples.
6. What are cosme cs? Give examples.

AT LENGTH

A. Explain the following terms.
1. Chemistry 2. Alchemists 3. Preserva ves 4. Food processing

B. Diff eren ate between the following.
1. Science and chemistry 2. Preserva ves and processed foods
3. Natural fi bres and synthe c fi bres

C. Answer in detail.
1. Write a note on alchemy.
2. Write about the contribu ons of these notable scien sts.
(a) Antoine Lavoisier (b) Dmitri Mendeleev
3. How has chemistry helped to meet the increased demand of food due to an increase in popula on?
4. Write a note on how chemistry plays a role in the development of cosme cs.
5. What is the role of chemistry in the development of medicines?
6. How has chemistry contributed to the development of diff erent industries?

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