Explanation

• The poisonous gas which is the main byproduct of motor vehicles with an irritating smell is sulfur dioxide (SO₂).
• Sulfur dioxide is produced by the combustion of fossil fuels containing sulfur and contributes to air pollution and respiratory problems.

Explanation

The renewable energy sources are:

• Water energy
• Wind energy
• Tidal energy
• Hydroelectric
• Ocean energy
• Geothermal energy
• Biomass
• Biogas

The non-renewable energy sources are:

• Fossil fuels or Hydrocarbon fuel (Oil, Natural gas, Coal)
• Nuclear energy

Explanation

• The magnet is the part of a bicycle dynamo that spins to generate electricity.
• When the magnet rotates, it induces an electric current in the coils of the dynamo.
• It producing electricity to power the bike's lights or other accessories.

Explanation

• 10^-9 second = Nano second (ns)
• 10^-6 second = Micro second (μs)
• 10^-3 second = Milli second (ms)
• 10^-2 second = Centi second (cs)
• 10^-1 second = Deci second (ds)

Explanation

• Ascorbic acid, also known as Vitamin C, is found in various fruits and vegetables.
• But Alma (Emblica officinalis) and citrus fruits like oranges, lemons, and grapefruits are particularly rich in it.

Explanation

• In bacterial cells, the DNA is found floating in the cytoplasm, rather than being enclosed in a membrane-bound nucleus like in eukaryotic cells.
• This region of the cytoplasm where the DNA is found is called the nucleoid.

Explanation

• Telophase is the stage of mitosis where chromosomes reach their respective poles.
• During Telophase, the nuclear envelope reforms around each set of chromosomes, and the chromosomes uncoil into chromatin.

Explanation

• The spinal cord is a vital part of the central nervous system.
• It responsible for transmitting messages between the brain and the rest of the body.

Explanation

• Air expands the most for a given rise in temperature, due to its low density and high thermal expansion coefficient.
• This is why hot air rises and cool air sinks, driving convection currents in the atmosphere.

Explanation

• Methyl orange is a pH indicator that changes color in response to changes in acidity or basicity.
• In an acidic medium, it is orange (or red), and in a basic medium, it turns yellow.