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CBSE Class 9 Matter in Our Surroundings — practice questions

Explore 57 free Matter in Our Surroundings questions in CBSE Class 9 Science. Open each question or exercise to read its content, reference answers and available explanation.

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Matter in Our Surroundings questions and exercises with answers

Showing questions 1–30 of 57.

A mixture in which the composition is uniform throughout (like sugar dissolved in water) is called:Read the answer and worked solution →In a sugar solution, what is sugar called?Read the answer and worked solution →A mixture of sand and water settles over time with sand at the bottom and clear water above. This is a:Read the answer and worked solution →The 'mass by mass percentage' of a solution is defined as:Read the answer and worked solution →A 200 g salt solution contains 30 g of salt. The mass-by-mass concentration is:Read the answer and worked solution →What method is BEST suited to separate a mixture of two miscible liquids with different boiling points (e.g. water and ethanol)?Read the answer and worked solution →A HOMOGENEOUS mixture is one in which:Read the answer and worked solution →In LEMON JUICE (sugar dissolved in water), the SOLUTE is:Read the answer and worked solution →A SATURATED solution is one in which:Read the answer and worked solution →To separate SAND from water, the most appropriate method is:Read the answer and worked solution →CRYSTALLISATION is used to:Read the answer and worked solution →CHROMATOGRAPHY is most commonly used in school labs to:Read the answer and worked solution →Avogadro's number equals:Read the answer and worked solution →A compound differs from a mixture because:Read the answer and worked solution →CLASS9 · Chemistry · States of Matter — PairRead the answer and worked solution →Match the state of matter to its key propertyRead the answer and worked solution →Homogeneous or heterogeneous?Read the answer and worked solution →Match the separation methodRead the answer and worked solution →Solution, colloid or suspension?Read the answer and worked solution →True or false about mixturesRead the answer and worked solution →Concentration numbersRead the answer and worked solution →Complete the solution termsRead the answer and worked solution →Spot the odd one outRead the answer and worked solution →Mixtures bingoRead the answer and worked solution →The intermixing of particles of matter on their own is called:Read the answer and worked solution →On heating, the rate of diffusion becomes:Read the answer and worked solution →Which state of matter diffuses fastest into another?Read the answer and worked solution →The melting point of ice is:Read the answer and worked solution →The change of a solid into a liquid is also known as:Read the answer and worked solution →While ice is melting, the temperature of the system:Read the answer and worked solution →

Worked practice questions

A mixture in which the composition is uniform throughout (like sugar dissolved in water) is called:

  1. Heterogeneous mixture
  2. Homogeneous mixture (solution)
  3. Compound
  4. Suspension
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Correct answer: B. Homogeneous mixture (solution)

In a homogeneous mixture (also called a solution), the components are uniformly distributed at the molecular level. Sugar in water, salt in water, and air (gases) are examples. The composition is the same throughout — every spoonful tastes equally sweet.

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In a sugar solution, what is sugar called?

  1. Solute
  2. Suspension
  3. Filtrate
  4. Solvent
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Correct answer: A. Solute

Solute is the substance that GETS DISSOLVED. Solvent is the substance that DOES THE DISSOLVING. In sugar+water, sugar is the solute and water is the solvent. The result is a solution.

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A mixture of sand and water settles over time with sand at the bottom and clear water above. This is a:

  1. Heterogeneous mixture
  2. Homogeneous mixture
  3. Compound
  4. Solution
Show answer and solution

Correct answer: A. Heterogeneous mixture

In sand + water, the sand particles are visible and don't dissolve — composition isn't uniform. So this is a heterogeneous mixture. Filtration easily separates them.

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