Question

1 Q. In a circuit diagram , the various components of the circuit are represented by

Standard pictures

Handles of

Lines

Standard symbols

2 Q. Which one of the following is not used as an indicator

Vinegar

Methyl orange

Litmus

Phenolphthalein

3 Q. Which of these is an irreversible Physical change

Rusting of Iron

Breaking of a glass tumbler

Freezing of water

A double decomposition reaction

4 Q. Common salt is obtained from sea water by

Sedimentation

Condensation

Evaporation

Crystallization

5 Q. Handles of cooking utensils should be made of a material that

Radiates heat well

Does not radiate heat well

Conduct heat well

Does not conduct heat well

6 Q. Alkalis

Have bitter taste

Soluble in water

Turn red litmus blue

Have all of these properties

7 Q.At ____ degrees temperature of the Celsius scale and Fahrenheit scale are equal

- 40

98.6

40

37

8 Q. When an electric current flows through a wire then it

Melts easily

Cools down

Behave like a magnet

Boils

9 Q. Sodium bicarbonate ,which is used in bakeries and medicines is a/an

Base

Acid

Indicator

salt

10 Q. A neutralization reaction is a -------- reaction.

Double Displacement

Combination

single displacement

Decomposition

11 Q. Milk contains ----- acid.

Lactic acid

Malic acid

Tannic acid

Acetic acid

12 Q. The primary mode of heat transfer in a gases is

Conduction

Radition

Convection

All of the above

13 Q. Heat is absorbed in ----- reaction.

Exoothermic

Neutralization

Combination

Endothermic

14 Q. Heat causes

Expansion

Change in temperature

Change of state

All of these








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Answer 1

Answer:

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Answer 2

Answer:

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