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A Learning Portal from Recruitment India
A Learning Portal from Recruitment India
Nuclear particles responsible for holding all nucleons together are
electrons
protons
neutrons
mesons
Answer with explanation
Answer: Option DExplanation
Mesons are hadronic subatomic particles composed of one quark and one antiquark, bound together by the strong interaction.
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Elements with the same atomic number but different mass numbers are called _________.
Isobars
Isotopes
Isotones
Isomers
Answer with explanation
Answer: Option BExplanation
Isotopes are atoms with the same number of protons but that have a different number of neutrons. Since the atomic number is equal to the number of protons and the atomic mass is the sum of protons and neutrons, we can also say that isotopes are elements with the same atomic number but different mass numbers.
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Potassium Permanganate is used for purifying drinking water, because_________
It is a reducing agent
It is an oxidising agent
It is a sterilising agent
It dissolves the impurities of water
Answer with explanation
Answer: Option BExplanation
Potassium permanganate(KMnO4) is a strong oxidizing agent that does not generate toxic byproducts. It is used extensively in the water treatment industry. It was used to disinfect drinking water and can turn the water pink. Now a days it is used in control of nuisance organisms such as zebra mussels in fresh water collection and treatment systems.
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Photochemical smog is a resultant of the reaction among
NO₂, O₃ and peroxy acetyl nitrate in the presence of Sunlight
High concentration of NO₂, O₃ and CO in the evening
NO₂, and peroxy acetyl nitrate in the presence of Sunlight
CO, CO₂ and NO₂ at low temperature
Answer
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