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Indian Navy 10+2 B.Tech Cadet Science — practice by topic

Browse 26 questions across 11 Science topics. Choose what you want to revise, then open a question to check its answer and worked solution.

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Science topics

Chemical Reactions and Equations (4)Light - Reflection and Refraction (4)Metals and Non-metals (4)Acids, Bases and Salts (3)Acids Bases Salts (3)Electricity (3)The Human Eye and the Colourful World (3)Carbon and its Compounds (2)C10magneticeffects (1)Class10 Chem Reaction Types (1)Light (1)

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A ray of light travelling in air enters water (n = 4/3). It bendsRead the answer and worked solution →A solution with a pH less than 7 is:Read the answer and worked solution →Electric current is defined as the rate of flow of:Read the answer and worked solution →The SI unit of electrical resistance is the:Read the answer and worked solution →

Worked practice questions

A ray of light travelling in air enters water (n = 4/3). It bends

  1. along the surface
  2. away from the normal
  3. back into air
  4. towards the normal
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Correct answer: D. towards the normal

Going from a rarer (air) to a denser (water) medium, light slows and bends towards the normal.

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A solution with a pH less than 7 is:

  1. acidic
  2. neutral
  3. basic
  4. always pure water
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Correct answer: A. acidic

pH below 7 means the solution is acidic.

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Electric current is defined as the rate of flow of:

  1. power
  2. electric charge
  3. voltage
  4. resistance
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Correct answer: B. electric charge

Current is the rate of flow of electric charge: I = Q/t.

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How to practise

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  2. Open the question to check the correct answer and read its worked solution.
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