Elements Uses

Total Questions: 21

1 - Name the elements which is used to fabricate solar cell and transistors?

A ) Iron
B ) Germanium
C ) Silicon ✅
D ) None of these

2 - Solar cell convert-------?

A ) Solar energy into electricity ✅
B ) Heat to electrical energy
C ) Solar to light
D ) Heat to light energy

3 - Which type of material is used in a lead pencil-----:

A ) Rubber
B ) Graphite ✅
C ) Gypsum
D ) Silicon

4 - Which material is used to make electrodes in dry batteries?

A ) Copper
B ) Graphite ✅
C ) Aluminium
D ) Iron

5 - What type of battery is commonly used in automobiles?

A ) Lead-acid ✅
B ) Nickel-cadmium
C ) Lithium-ion
D ) Alkaline

6 - Which of the following batteries is rechargeable?

A ) Lithium ion ✅
B ) Alkaline
C ) Zinc carbon
D ) Silver oxide

7 - What is the main electrolyte use in lead acid batteries?

A ) Sodium hydroxide
B ) Nitric acid
C ) Hydrochloric acid
D ) Sulfuric acid ✅

8 - They you not of battery capacity is measured in-------:

A ) Amperes
B ) Ampere hours ✅
C ) Watt hours
D ) Volts

9 - Which type of battery commonly used in laptops and smartphone?

A ) Lithium ion ✅
B ) Zinc carbon
C ) Lead Acid
D ) Nickel Cadmium

10 - Dry cell batteries use which electrolyte?

A ) Paste of ammonium chloride ✅
B ) Sodium hydroxide
C ) Liquid acid
D ) Lead dioxide

11 - The first battery was invented by ---:

A ) Alessandra Volta ✅
B ) Michael Faraday
C ) Thomas Edison
D ) Nikola Tesla

12 - What is the main disadvantage of Nickel -Cadmium(NiCd) batteries?

A ) Memory effect ✅
B ) High cost
C ) Low energy density
D ) Toxic fumes

13 - The cathode of a dry cell battery is made of ---:

A ) Carbon ✅
B ) Zinc
C ) Copper
D ) Iron

14 - In a battery the positive electrode is called ---:

A ) Cathode ✅
B ) Anode
C ) Electrolyte
D ) Terminal

15 - What is the primary function of an electrolyte in a battery?

A ) Store energy
B ) Prevent corrosion
C ) Absorb heat
D ) Conduct electricity ✅

16 - Alkaline batteries use which material as an anode?

A ) Copper
B ) Iron
C ) Magnesium
D ) Zinc ✅

18 - What type of battery is used in hybrid and electric vehicles?

A ) Lithium ion ✅
B ) Lead acid
C ) Alkaline
D ) Nickel cadmium

19 - Which substance is used in match sticks?

A ) Zink
B ) Iron
C ) Nitric Acid
D ) Sulphur ✅

20 - Which metal is used in the fluorescent tube and bulb of a thermometer?

A ) Iron
B ) Mercury ✅
C ) Copper
D ) None of these

21 - Which material is used to make the glass in the thermometer?

A ) Aluminium
B ) Mercury ✅
C ) Copper
D ) Lead