Top 100 Important Everyday Science Mcqs Set-1

1- Which of the following is the lightest metal?

A. Mercury
B. Silver
C. Lithium
D. Lead

Answer : C. Lithium

2- The most important ore of aluminum is:

A. Bauxite
B. Calamine
C. Calcite
D. Galena

Answer : A. Bauxite

3- The element present in the largest amount in rocks and minerals is:

A. Carbon
B. Silicon
C. Hydrogen
D. Aluminum

Answer : B. Silicon

4- An alloy used in making heating elements for electric heating devices is:

A. Solder
B. Alloy steel 
C. Nichrome
D. German silver 

Answer : C. Nichrome

5- German silver is an alloy of:

A. Silver, zinc and copper
B. Copper, nickel and silver 
C. Silver, copper and aluminum 
D. Zinc, copper and nickel

Answer : D. Zinc, copper and nickel

6- Diamond is an allotropic form of:

A. Silicon
B. Carbon
C. Sulphur
D. Germanium

Answer : B. Carbon

7- Air is a/an:

A. Compound
B. Electrolyte
C. Element
D. Mixture

Answer : D. Mixture

8- Which of the following is the best conductor of electricity?

A. Rain water
B. Boiled water 
C. Sea water
D. Ordinary Water 

Answer : C. Sea water

9- Balloons are filled with:

A. Helium
B. Oxygen
C. Argon
D. Nitrogen

Answer : A. Helium

10- The charcoal used to decolorize raw sugar is:

A. Animal charcoal
B. Sugar charcoal 
C. Coconut
D. Wood charcoal

Answer : A. Animal charcoal

11- The most abundant metal in the earth’s crust is:

A. Iron
B. Zinc
C. Copper
D. Aluminum

Answer : D. Aluminum

12- Production of chlorofluorocarbons (CFC) gas which is proposed to be banned in Pakistan, is used in which of the following domestic products?

A. Cooking gas 
B. Refrigerator
C. Tube light 
D. Television

Answer : B. Refrigerator

13- The gas used to extinguish fire is:

A. Neon
B. Nitrogen
C. Carbon dioxide
D. Carbon

Answer : C. Carbon dioxide

14- In which of the following activities is silicon carbide used?

A. Making cement and glass 
B. Disinfecting water of ponds 
C. Making casts for statues 
D. Cutting very hard substances

Answer : D. Cutting very hard substances

15- The element common to all acids is:

A. Sulphur
B. Oxygen
C. Hydrogen
D. Carbon

Answer : C. Hydrogen

16- Gobar gas contains mainly:

A. Methane
B. Carbon dioxide 
C. Butane
D. Carbon

Answer : A. Methane

17- The most malleable metal is:

A. Gold
B. Silver
C. Aluminum
D. Sodium

Answer : A. Gold

18- Tetraethyl lead is used as:

A. Mosquito repellent 
B. Pain Killer 
C. Fire extinguisher 
D. Petrol additive

Answer : D. Petrol additive

19- Which of the following is used in beauty parlors for hair setting?

A. Silicon
B. Phosphorus
C. Sulphur
D. Chlorine

Answer : A. Silicon

20- The most efficient engine is:

A. Steam
B. Electric
C. Diesel
D. Petrol

Answer : C. Diesel

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