Start learning →

Indian Navy SSR (Sailor) Science — practice by topic

Browse 28 questions across 13 Science topics. Choose what you want to revise, then open a question to check its answer and worked solution.

Start learning Indian Navy SSR (Sailor) with Quill →

Science topics

Science & Technology (8)Metals and Non-metals (4)Chemistry (3)Acids, Bases and Salts (2)Acids Bases Salts (2)Chemical Reactions and Equations (2)Electricity (2)Physics (2)Carbon and its Compounds (1)Class10 Chem Redox Energy (1)Light - Reflection and Refraction (1)Metals & Non-metals (1)The Human Eye and the Colourful World (1)

Try a Science question

Which of the following is NOT an ionic compound?Read the answer and worked solution →A solution with a pH greater than 7 is:Read the answer and worked solution →A curry stain turns reddish-brown on a soap-washed cloth and yellow again on rinsing because soap is:Read the answer and worked solution →The SI unit of electrical resistance is the:Read the answer and worked solution →

Worked practice questions

Which of the following is NOT an ionic compound?

  1. CH₄
  2. MgCl₂
  3. NaCl
  4. CaO
Show answer and solution

Correct answer: A. CH₄

CH₄ (methane) is covalent — electrons are shared between C and H. NaCl, MgCl₂, CaO are ionic (metal + non-metal, electron transfer).

Open this question →

A solution with a pH greater than 7 is:

  1. acidic
  2. basic (alkaline)
  3. a strong acid
  4. neutral
Show answer and solution

Correct answer: B. basic (alkaline)

pH above 7 means the solution is basic (alkaline).

Open this question →

A curry stain turns reddish-brown on a soap-washed cloth and yellow again on rinsing because soap is:

  1. basic in nature
  2. acidic in nature
  3. neutral
  4. a strong acid
Show answer and solution

Correct answer: A. basic in nature

Soap is basic; it turns the curry (turmeric) stain reddish-brown, and rinsing restores the yellow.

Open this question →

How to practise

  1. Choose a Science question and try to work out your answer.
  2. Open the question to check the correct answer and read its worked solution.
  3. Continue in the app for bite-sized lessons, explanations and review with Quill. You can start without creating an account.