Page 25 - ICSE Chemistry 6

EXERCISES

BE PROMPT

A. Fill in the blanks.
1. ___________ were regarded as early chemists.
2. ____________ is considered as the ‘Father of Modern Chemistry’.

3. John Dalton is credited for proposing _____________________.
4. Terylene is a ____________ fi bre.
5. Cheese and breads are examples of _________________.
6. ______________ is an example of an an bio c.

B. Iden fy the error in the given statements. Circle the incorrect word and write the correct word in
the blank.
1. Science has two main branches: chemical science and natural science. _____________
2. By the late seventeenth century, the fi eld of chemistry had completely
separated from tradi onal alchemy. _____________
3. J.J. Thomson discovered the proton. _____________

4. Jam and jelly are the processed foods. _____________
5. Manufacturing of clothes involves the combina on of fi bres into fabrics. _____________
6. Paracetamol is an an bio c used to treat infec ons. _____________

C. Choose the correct op on.
1. Chemistry is a ____________ science.
(a) social (b) physical (c) life (d) none of these

2. Which of the following metals was considered the purest according to alchemy?
(a) Potassium (b) Silver (c) Sodium (d) Gold
3. Who gave the ‘law of conserva on of mass’?

(a) Dmitri Mendeleev (b) Niels Bohr
(c) Antoine Lavoisier (d) John Dalton
4. Which of the following is not a preserva ve?

(a) Sugar (b) Salt
(c) Vinegar (d) Yogurt
5. Which of the following come under the category of cosme cs?

(a) Skin cleansers (b) Moisturisers (c) Perfumes (d) All of these
6. Which of the following is a synthe c fi bre?
(a) Co on (b) Nylon (c) Silk (d) Wool

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