General Science Quiz in Hindi
Questions: 16 · 10 minutes
1. A solid object floats in water without being held. What can be inferred about the object's average density?
It is lower than the density of water
It must be greater than the density of water
It must be equal to the density of every material it contains
Density is unrelated to whether an object floats
2. Which gas is released as a major product when green plants perform photosynthesis?
Nitrogen
Hydrogen
Methane
Oxygen
3. Which atmospheric gas contributes to warming by absorbing some of Earth's outgoing infrared radiation?
Carbon dioxide
Helium
Neon
Argon
4. In a simple grass–rabbit–fox food chain, a disease sharply reduces the amount of grass. Which population is likely to face the most immediate food shortage?
Grass, because it feeds on rabbits
Foxes only, because they are top consumers
Decomposers
Rabbits
5. Two bulbs are connected so that one continues glowing when the other is removed. What does this observation indicate?
No electric current passes through either bulb
The bulbs are connected in a single series loop
The bulbs are on separate branches of a parallel circuit
The removed bulb has increased the battery's stored charge
6. Which cell structure releases usable energy from food through cellular respiration?
Mitochondrion
Ribosome
Cell membrane
Vacuole
7. When a moving car stops suddenly, a seat belt helps prevent a passenger from continuing forward. Which principle best explains the passenger's forward motion?
Buoyancy
Inertia
Magnetic induction
Thermal expansion
8. A rock forms when molten material cools and solidifies. To which major rock group does it belong?
Sedimentary
Metamorphic
Fossiliferous
Igneous
9. What is the main reason Earth experiences seasons?
Earth moves much closer to and farther from the Sun each year
The Sun produces substantially different amounts of heat each season
Earth rotates at different speeds during the year
Earth's tilted axis changes the angle and duration of sunlight by hemisphere
10. Why does the Moon appear to have different phases during a month?
Clouds cover predictable portions of the Moon
Earth's shadow regularly covers different parts of the Moon
We see changing portions of its sunlit half as the Moon orbits Earth
The Moon produces changing amounts of light
11. A metal spoon left in a bowl of hot soup becomes warm at the handle. Which process transfers most of the heat through the spoon?
Conduction through the metal
Convection inside the solid spoon
Evaporation from the handle
Reflection of heat by the metal
12. What are the basic units of heredity passed from parents to offspring?
Hormones
Antibodies
Genes
Enzymes
13. Pure water is gradually added to an acidic solution with a pH of 3. Assuming no reaction other than dilution occurs, what happens to its pH?
It falls below 3 because there is more liquid
It rises toward 7 as the acid becomes more dilute
It remains exactly 3 because water is neutral
It immediately becomes greater than 7
14. An alarm clock is ringing inside a sealed chamber. As nearly all the air is removed, the sound becomes extremely faint outside the chamber. Why?
The clock stops vibrating when air pressure decreases
A vacuum absorbs sound by turning it into light
Sound needs a material medium and cannot travel through a vacuum
Sound travels only downward when little air is present
15. Why are antibiotics generally ineffective against the viruses that cause common colds?
Viruses are always too small for medicines to reach
Antibiotics target bacterial structures or processes that viruses lack
Antibiotics work only at temperatures below body temperature
Cold viruses are a type of antibiotic-resistant bacterium
16. A student needs to recover dissolved salt from a saltwater solution. Which method is most suitable?
Filtering the solution through paper
Evaporating the water
Using a magnet to attract the salt
Allowing the salt to settle without evaporation