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1. Liberation of heat during chemical reaction is termed as

A

Exothermic reactions

B

Endothermic reactions

C

Isothermic reactions

D

Photochemical reactions

2. In a homologous series, increase in melting point can be seen with increase in

A

Molecular mass

B

Atomic number

C

Proton

D

Electron

3. Antacid used for reducing stomach pain is a

A

mild base

B

mild acid

C

neutral solution

D

strong acid

4. Most reactive metal among the following is

A

Sodium

B

Magnesium

C

Gold

D

Silver

5. When Sodium reacts with water to form sodium hydroxide, the physical state of sodium hydroxide is

A

Solid

B

Liquid

C

Gas

D

Plasma

6. When carbon dioxide is passed through lime water, the white precipitate obtained is

A

Calcium Carbonate

B

Sodium Carbonate

C

Potassium Carbonate

D

Zinc Carbonate

7. An example of saturated carbon compound is

A

Ethane

B

Ethene

C

Propene

D

Alkene

8. Rancidity in oils and fats is due to

A

Oxidation

B

Reduction

C

Substitution reaction

D

Combination reaction

9. Functional group in butanal is

A

CHO

B

COOH

C

COOR

D

CO

10. Components of the Stainless steel alloy are

A

Iron, Nickel and Chromium

B

Iron, Nickel and Magnesium

C

Iron, Bronze and Magnesium

D

Bronze, Magnesium and Nickel

11. Addition of Sodium chloride to water

A

increases temperature of water

B

decreases temperature of water

C

no change in temperature

D

rapidly increases temperature and then decreases

12. Methyl orange indicator give which of the following colour in an acid solution

A

Red

B

Yellow

C

Orange

D

Pink

13. If the net force acting on an object is zero, then the body is known to be in the state of

A

motion

B

uniform motion

C

equillibrium

D

inertia motion

14. Which of the following is a renewable resource?

A

Petrol

B

LPG

C

Coal

D

Wind

15. Electronic configuration of sodium is

A

8,2,1

B

2,1,8

C

2,8,1

D

1,8,2

16. Which of the following law states, matter can neither created nor destroyed during a chemical reaction?

A

Constant proportion

B

Conservation of mass

C

Disproportion

D

Invisible particles

17. Which of the following battery is a primary battery?

A

Lead Acid

B

Nickel Metal Hydride

C

Lithium

D

Nickel Cadmium

18. Which of the following is a Greenhouse gas?

A

Nitrogen

B

Methane

C

Oxygen

D

Sulphur Dioxide

19. Which of the following belongs to autotroph?

A

Lion

B

Cow

C

Grass

D

Cat

20. The scientist who said that an object in motion will remain in same motion as long as no external force is applied is

A

Newton

B

Dalton

C

Galileo

D

Aristotle