Start learning →

ICSE Class 10 Light and Sound — practice questions — page 2

Explore 50 free Light and Sound questions in ICSE Class 10 Physics. Open each question or exercise to read its content, reference answers and available explanation.

Practise Light and Sound with Quill →

Light and Sound questions and exercises with answers

Showing questions 31–50 of 50.

Oils on treating with hydrogen in the presence of palladium or nickel catalyst form fats. This is an example ofRead the answer and worked solution →Soap molecules in water form micelles because:Read the answer and worked solution →Which alkane is added to LPG to make it detectable through smell?Read the answer and worked solution →Identify the unsaturated compounds from the following (i) Propane (ii) Propene (iii) Propyne (iv) ChloropropaneRead the answer and worked solution →Chlorine reacts with saturated hydrocarbons at room temperature in theRead the answer and worked solution →How many isomers exist for the molecular formula C4H10?Read the answer and worked solution →The correct electron dot structure of a water molecule isRead the answer and worked solution →Match each carbon term to its meaningRead the answer and worked solution →Which one does NOT belong?Read the answer and worked solution →Key in the carbon numberRead the answer and worked solution →Saturated, unsaturated or neither?Read the answer and worked solution →Sound CANNOT travel through:Read the answer and worked solution →In a sound wave, a region where the density of the medium is HIGHER than average is called a:Read the answer and worked solution →The human audible frequency range is approximately:Read the answer and worked solution →Reverberation refers to:Read the answer and worked solution →Match each sound wave phenomenon with its manifestation:Read the answer and worked solution →Match each ultrasound application with its field:Read the answer and worked solution →Match each anatomical region of the human ear with its acoustic role:Read the answer and worked solution →Match each wave parameter with its definition and symbol:Read the answer and worked solution →Match the indicator test to its colour changeRead the answer and worked solution →

Worked practice questions

Oils on treating with hydrogen in the presence of palladium or nickel catalyst form fats. This is an example of

  1. Addition reaction
  2. Substitution reaction
  3. Displacement reaction
  4. Oxidation reaction
Show answer and solution

Correct answer: A. Addition reaction

This Carbon and its Compounds item tests a core Chemistry concept. Correct answer: Addition reaction. _Source: syllabus Exemplar Science Class 10_

Open this question →

Soap molecules in water form micelles because:

  1. Their entire body is hydrophobic under typical conditions
  2. They have a hydrophilic head and a hydrophobic tail
  3. Water expels them in general usage
  4. They have ionic chains throughout
Show answer and solution

Correct answer: B. They have a hydrophilic head and a hydrophobic tail

1. Soap molecules have two distinct ends. 2. The hydrocarbon tail is non-polar (hydrophobic). 3. The carboxylate head is polar and ionic (hydrophilic). 4. In water, tails huddle together and heads face outward. 5. The resulting spherical clusters are called micelles. 6. Micelles trap oil droplets inside the tail cluster, enabling cleaning. _Source: syllabus Science Ch 4 'Carbon and its Compounds' (byjus.com extract)_

Open this question →

Which alkane is added to LPG to make it detectable through smell?

  1. Methane
  2. Ethanethiol or mercaptan
  3. Propane
  4. Butane in the standard view
Show answer and solution

Correct answer: B. Ethanethiol or mercaptan

1. Pure LPG is mostly butane and propane and is odourless. 2. To detect leaks, a strong-smelling sulphur compound is added. 3. Ethanethiol (ethyl mercaptan, C2H5SH) is the standard odorant used. 4. Even tiny amounts give a sharp smell that warns of leaks. 5. Hence ethanethiol is the odorant added to LPG. _Source: syllabus Science Ch 4 'Carbon and its Compounds' (byjus.com extract)_

Open this question →

How to practise

  1. Choose a Light and Sound 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.

Put it into practice

Continue with Light and Sound practice for ICSE Class 10. Read explanations as you go. No signup form needed to start.

Practise Light and Sound →

More Physics topics

Ray Optics and Optical InstrumentsForce and MachinesWork, Energy and PowerElectricity: Current and Household CircuitsHeat: calorimetry, specific heat capacity and latent heatModern Physics: radioactivity, nuclear fission and fusionSound: echoes, natural vibrations, loudness pitch and qualityCalorimetry