Do you want to improve your understanding of general science questions, especially on the topics of Sound and improvement in Food Resources? Inspired by the NCERT GK book, this effort offers you a carefully selected set of general science (physics) GK questions with answers. These GK question and answer sets, which cover the concepts of Sound, Improvement in Food Resources, are ideal for students, competitive exam candidates, and inquisitive learners. These tests, which feature an easy-to-understand format, help improve memory retention and solidify fundamentals. Our collection of science and physics questions will help you learn more effectively, whether you’re studying for school exams or general knowledge assessments.
In this blog post, we’ve compiled 50 Most Important GS GK Questions with detailed answers as a part of the Science GK effort by our team. These questions are ideal for aspirants preparing for UPSC, SSC, Railway, CDS, NDA, State PSC, and other government exams. Understanding these facts not only strengthens your static GK but also gives an edge in science, especially in the general science and physics sections.
Multiple-Choice Question:
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📘 Sound:
- Sound is a form of:
a) Matter
b) Heat energy
c) Energy
d) Pressure - Sound is produced due to:
a) Friction
b) Vibration
c) Temperature
d) Light - Sound needs a ______ to travel.
a) Vacuum
b) Medium
c) Space
d) Force - Which of the following cannot transmit sound?
a) Air
b) Water
c) Vacuum
d) Iron - Sound waves are:
a) Transverse
b) Longitudinal
c) Stationary
d) None - The regions of high pressure in a sound wave are called:
a) Rarefactions
b) Nodes
c) Compressions
d) Crests - The SI unit of frequency is:
a) m/s
b) Hertz (Hz)
c) Pascal
d) Joule - Frequency and time period are related as:
a) f = T
b) f = T²
c) f = 1/T
d) f = 2T - The speed of sound in air is approximately:
a) 100 m/s
b) 500 m/s
c) 344 m/s
d) 1000 m/s - Sound travels fastest in:
a) Air
b) Water
c) Solids
d) Vacuum - The time taken for one complete oscillation is called:
a) Time period
b) Frequency
c) Amplitude
d) Wavelength - The distance between two consecutive compressions is:
a) Wavelength
b) Frequency
c) Time period
d) Pitch - The loudness of sound depends on:
a) Wavelength
b) Frequency
c) Amplitude
d) Velocity - The pitch of sound depends on:
a) Frequency
b) Amplitude
c) Loudness
d) Wavelength - Sound waves that humans cannot hear are called:
a) Audible
b) Infrasonic or ultrasonic
c) Harmonic
d) Music - Audible range for humans is:
a) 10–10,000 Hz
b) 50–50,000 Hz
c) 20–20,000 Hz
d) 100–100,000 Hz - The persistence of sound after reflection is called:
a) Echo
b) Reverberation
c) Resonance
d) Noise - For distinct echo, the minimum distance of obstacle from source is:
a) 17.2 m
b) 1 m
c) 10 m
d) 20 m - The reflection of sound follows the same laws as:
a) Magnetism
b) Light
c) Force
d) Energy - Ultrasonic waves are used in:
a) Listening music
b) Medical imaging (Ultrasonography)
c) Cooking
d) None - Sound travels faster in:
a) Gases
b) Liquids
c) Solids
d) Vacuum - The SI unit of wavelength is:
a) Metre (m)
b) Second
c) Hertz
d) Pascal - A wave in which particles move parallel to propagation is:
a) Transverse
b) Longitudinal
c) Electromagnetic
d) Surface - Loudness of sound decreases with:
a) Distance
b) Frequency
c) Time
d) Amplitude - The device used by doctors to listen to heartbeat is:
a) Stethoscope
b) Telescope
c) Microscope
d) Spectroscope
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📘 Improvement in Food Resources:
- The major source of food for humans is:
a) Animals
b) Plants and animals
c) Soil
d) Air - Green revolution is related to:
a) Fish
b) Crops
c) Milk
d) Poultry - White revolution is related to:
a) Eggs
b) Fish
c) Milk
d) Crops - Sustainable agriculture means:
a) High use of fertilizers
b) Increasing yield without harming environment
c) Using more land
d) Reducing farming - The process of crossing two genetically different plants is:
a) Cloning
b) Mutation
c) Hybridisation
d) Fertilisation - Macronutrients for plants are required in:
a) Small quantities
b) Large quantities
c) Traces
d) None - Example of micronutrient:
a) Zinc
b) Nitrogen
c) Phosphorus
d) Potassium - Organic manure is rich in:
a) Chemicals
b) Organic matter
c) Plastic
d) Metals - Fertilizers mainly supply:
a) Carbon, Oxygen
b) Nitrogen, Phosphorus, Potassium
c) Iron, Sulphur, Copper
d) None - Green manure is:
a) Chemical fertilizer
b) Decomposed green plants
c) Compost
d) Sewage - The process of supplying water to crops is called:
a) Harvesting
b) Irrigation
c) Fertilisation
d) Cropping - Crop rotation helps in:
a) Increasing cost
b) Maintaining soil fertility
c) Reducing yield
d) None - Mixed cropping means:
a) Same crop
b) Two or more crops on same land
c) Only cereals
d) None - Storage losses of grains are caused by:
a) Temperature only
b) Insects, fungi, moisture
c) Fertilizer
d) None - Animal husbandry deals with:
a) Crops
b) Livestock
c) Trees
d) Soil - Milch animals are used for:
a) Milk production
b) Farm work
c) Transport
d) Meat - Draught animals are used for:
a) Agricultural labour
b) Milk
c) Eggs
d) Fishing - Cross breeding improves:
a) Disease only
b) Both milk yield and resistance
c) Colour
d) None - Poultry farming is for:
a) Crops
b) Egg and meat production
c) Fish
d) Honey - Fish farming in sea is called:
a) Mariculture
b) Aquaculture
c) Pisciculture
d) Inland farming - Composite fish culture involves:
a) Same species
b) Different species in one pond
c) Only Rohu
d) Only Catla - Bee-keeping is also called:
a) Fishery
b) Apiculture
c) Sericulture
d) Horticulture - Honeybees collect nectar from:
a) Flowers
b) Soil
c) Fruits
d) Trees - Manure improves:
a) Soil structure and fertility
b) Only water
c) Air
d) Pollution - The Indian bee commonly used for honey production is:
a) A. mellifera
b) A. cerana indica
c) A. dorsata
d) A. florae
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Answer Key
| S. No. | Answer | S. No. | Answer |
| 1 | C. Energy | 26 | B. Plants and animals |
| 2 | B. Vibration | 27 | B. Crops |
| 3 | B. Medium | 28 | C. Milk |
| 4 | C. Vacuum | 29 | B. Increasing yield without harming environment |
| 5 | B. Longitudinal | 30 | C. Hybridisation |
| 6 | C. Compressions | 31 | B. Large quantities |
| 7 | B. Hertz (Hz) | 32 | A. Zinc |
| 8 | C. f = 1/T | 33 | B. Organic matter |
| 9 | C. 344 m/s | 34 | B. Nitrogen, Phosphorus, Potassium |
| 10 | C. Solids | 35 | B. Decomposed green plants |
| 11 | A. Time period | 36 | B. Irrigation |
| 12 | A. Wavelength | 37 | B. Maintaining soil fertility |
| 13 | C. Amplitude | 38 | B. Two or more crops on same land |
| 14 | A. Frequency | 39 | B. Insects, fungi, moisture |
| 15 | B. Infrasonic or ultrasonic | 40 | B. Livestock |
| 16 | C. 20–20,000 Hz | 41 | A. Milk production |
| 17 | B. Reverberation | 42 | A. Agricultural labour |
| 18 | A. 17.2 m | 43 | B. Both milk yield and resistance |
| 19 | B. Light | 44 | B. Egg and meat production |
| 20 | B. Medical imaging (Ultrasonography) | 45 | A. Mariculture |
| 21 | C. Solids | 46 | B. Different species in one pond |
| 22 | A. Metre (m) | 47 | B. Apiculture |
| 23 | B. Longitudinal | 48 | A. Flowers |
| 24 | A. Distance | 49 | A. Soil structure and fertility |
| 25 | A. Stethoscope | 50 | B. A. cerana indica |
Tips for Aspirants – Why These GK Questions Matter?
If you’re aiming for exams like UPSC, SSC, Railways, or other State Public Service Commissions, mastering General Science questions is a must. Because science GK questions constitute a significant part of it. Questions from “Sound, Improvement in Food Resources” are frequently repeated in exams because they establish a scientific foundation for understanding the topics of General science.
🟢 These GK questions with answers help in:
- Strengthening your static GK base
- Quick revision of conceptual theories
- Differentiating between similar-sounding options
Pro Tip: Revise these questions multiple times, focus on keywords, and try linking each theory to a scientist’s name—it really helps in the elimination strategy!
Conclusion
We hope you found this collection of 50 MCQs were helpful in your exam preparation. General Science isn’t just about memorising formulae and terminologies—it’s about understanding how our discipline continues to evolve from the very beginning.
👉 Stay tuned for General Science GK Part-7
✍️ For more GK questions with answers, visit our dedicated 👉 GK Section.