Science & Technology GK

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Science & Technology GK — solved practice questions

8 SSC / Banking General Awareness questions with step-by-step solutions. Attempt each, then reveal the answer.

1. Q1easy

   The unit of electrical resistance is the:

   • AAmpere
   • BOhm
   • CVolt
   • DWatt
   Show answer & solution

   Correct answer: (B) Ohm

   Resistance is measured in Ohms (Ω), named after Georg Simon Ohm.

2. Q2easy

   The speed of light in vacuum is approximately:

   • A3 × 10⁶ m/s
   • B3 × 10⁸ m/s
   • C3 × 10¹⁰ m/s
   • D3 × 10⁴ m/s
   Show answer & solution

   Correct answer: (B) 3 × 10⁸ m/s

   Speed of light c ≈ 3 × 10⁸ m/s.

3. Q3easy

   Which planet is known as the 'Red Planet'?

   • AJupiter
   • BMars
   • CVenus
   • DSaturn
   Show answer & solution

   Correct answer: (B) Mars

   Mars appears red due to iron oxide (rust) on its surface.

4. Q4easy

   DNA stands for:

   • ADeoxyribonucleic Acid
   • BDiribose Nucleic Acid
   • CDeoxyribonitric Acid
   • DDiabosenucleic Acid
   Show answer & solution

   Correct answer: (A) Deoxyribonucleic Acid

   DNA = Deoxyribonucleic Acid, the molecule carrying genetic instructions.

5. Q5easy

   Which gas is used in fire extinguishers?

   • AOxygen
   • BCarbon dioxide
   • CNitrogen
   • DHydrogen
   Show answer & solution

   Correct answer: (B) Carbon dioxide

   Carbon dioxide (CO₂) is commonly used in fire extinguishers — it displaces oxygen and smothers the fire.

6. Q6easy

   The chemical symbol for Gold is:

   • AGo
   • BAu
   • CAg
   • DGd
   Show answer & solution

   Correct answer: (B) Au

   Gold's chemical symbol is Au, from the Latin word 'Aurum'.

7. Q7easy

   Deficiency of Vitamin C causes:

   • ARickets
   • BScurvy
   • CNight blindness
   • DBeriberi
   Show answer & solution

   Correct answer: (B) Scurvy

   Vitamin C deficiency causes scurvy, characterised by weakness, anaemia, and bleeding gums.

8. Q8medium

   The process of converting iron into steel is done in a:

   • ABlast furnace
   • BBessemer converter
   • CCrucible
   • DKiln
   Show answer & solution

   Correct answer: (B) Bessemer converter

   Steel is manufactured in a Bessemer converter or blast furnace by reducing the carbon content in iron.

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