Question

STEPPING STONE MODEL SCHOOL

FIRST UNIT TEST (2021-22)

SUB-Chemistry.

CLASS-SIX

FULL MARKS 45

2 marks for neatness and proper numbering of question

1. FILL IN THE BLANKS (1*5=5)

i. Loading increases the rate of ________.

ii. Helium is a ______ gas.

iii. _______ discovered the theory of radioactivity.

iv. The _____ and dyes which are used in textile industries.

v. _______ explained that atoms cannot be created or destroyed.

2. GIVE ONE WORD (1*5=5).

i. The medieval predecessor of chemistry.

ii. The first scientist made a clear distinction between Alchemy and Chemistry.

iii. The systematic study of the natural world ,based on experiment and observation.

iv. The smallest particle of an element.

v. Solid that remains on the filter paper during filtration.

3. DEFINE THE FOLLOWING (2*5=10)

i. Sedimentation.

ii. Chlorination.

iii. Mixture.

iv. Physical Chemistry.

v. Chemistry.

4. STATE THE CHEMICAL FORMULA (1*5=5)

i. Water

ii. Zinc Chloride

iii. Calcium Oxide

iv. Sodium hydroxide.

v. Sodium Chloride.

5. STATE OBSERVATION (2*3=6)

i. During separation of mixture of sand and water through filtration.

ii. During Separation of common salt from a solution of common salt and water

through evaporation

iii. During separation of stones from a sample of the soil.

6. ANSWER THE FOLLOWING (3+4=7)

i. Differentiate between Compounds and Mixtures.

ii. How will you separate a mixture of salt, sand and iron fillings

7. STATE THE SYMBOLS (1*5=5)

i. Nitrogen

ii. Sodium

iii. Potassium

iv. Iron

v. Calcium​

Answer 1

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Answer 2

Explanation:

DO IT ON YOUR OWN CHEATER