Physical Science
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Q81.Kidney stones is caused due to____?
Correct Answer: A
Kidney stones is caused due toCalcium Oxalate.
Q82.Some cultural element grow fast than the other which in turn lags behind is called
Correct Answer: B
Some cultural element grow fast than the other which in turn lags behind is called Cultural lags.
Q83.The cause of soil pollution is
Correct Answer: B
The cause of soil pollution is Acid rain.
Q84.Full grown tree absorb annually how much Carbon dioxide?
Correct Answer: A
48 pounds is the correct factual response to “Full grown tree absorb annually how much Carbon dioxide”.
Q85.The first element of periodic table is
Correct Answer: B
The first element of periodic table is Hydrogen.
Q86.Which element is liquid at room temperature :
Correct Answer: D
Bromine is the correct factual response to “Which element is liquid at room temperature :”.
Q87.Which metallic element is liquid at room temperature:
Correct Answer: C
Mercury is the correct factual response to “Which metallic element is liquid at room temperature:”.
Q88.In the atmosphere carbon dioxide is removed by __________
Correct Answer: C
In the atmosphere carbon dioxide is removed by Photosynthesis.
Q89.Which gas is used in fire extinguishers:
Correct Answer: B
Carbon dioxide is the correct factual response to “Which gas is used in fire extinguishers:”.
Q90.The most abundant metal found in earth crust:
Correct Answer: B
Aluminum is the correct factual response to “The most abundant metal found in earth crust:”.
Q91.Acid deposition causes ____?
Correct Answer: B
Acid deposition (acid rain) lowers the pH of water bodies and soil, destroying aquatic life, forests, and infrastructure.
Q92.DNA is ____?
Correct Answer: B
DNA (Deoxyribonucleic Acid) represents a class of nucleic acids that store genetic blueprints for all cellular organisms.
Q93.Dry ice is ____?
Correct Answer: C
Dry ice is solid carbon dioxide (CO2). It is highly volatile and sublimates directly to gas at -78.5°C (-109.3°F).
Q94.The main Constituent of Biogas is____?
Correct Answer: A
Biogas is produced by anaerobic digestion of organic matter and is composed mainly of methane (50-70%), which gives it its fuel value.
Q95.Which natural element has the highest melting point?
Correct Answer: B
Tungsten has the highest melting point of any metal, at 3,422°C, which is why it's used in light bulb filaments.
Q96.Air contains maximum amount of____?
Correct Answer: B
Nitrogen makes up about 78% of air by volume, the largest proportion of any atmospheric gas.
Q97.A ‘breath test’ used by traffic police to check drunken driving uses ____?
Correct Answer: D
Breathalyzer tests historically used a potassium dichromate-sulphuric acid solution, which changes colour when it reacts with alcohol in breath.
Q98.A nuclear reactor is a device used to carry out controlled nuclear reaction whereas GM counter is a device used to detect?
Correct Answer: C
A Geiger-Muller (GM) counter is a device used to detect and measure nuclear/ionizing radiation.
Q99.A substance which increases the efficiency of a catalyst is termed as:
Correct Answer: A
A promoter is a substance that increases the efficiency or activity of a catalyst without being a catalyst itself.
Q100.About 50% of the Earth’s crust, including the waters on the Earth and atmosphere, is?
Correct Answer: A
Oxygen makes up about 50% of the Earth's crust (including water and atmosphere) by mass, the most abundant element there.