General Knowledge
CHEMISTRY MCQs
Total Questions : 1203
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Answer: Option A. -> Greenhouse effect
Modern global warming is the result of an increase in magnitude of the so-called greenhouse effect, a warming of Earth's surface and lower atmosphere caused by the presence of water vapour, carbon dioxide, methane, nitrous oxides, and other greenhouse gases.
Modern global warming is the result of an increase in magnitude of the so-called greenhouse effect, a warming of Earth's surface and lower atmosphere caused by the presence of water vapour, carbon dioxide, methane, nitrous oxides, and other greenhouse gases.
Answer: Option C. -> protons and neutrons
The nucleus of an atom consists of protons and neutrons.
The nucleus of an atom consists of protons and neutrons.
Answer: Option A. -> molality
Molality is the property of a a solution that is defined as the number of moles of solute per kilogram of solvent.
Molality is the property of a a solution that is defined as the number of moles of solute per kilogram of solvent.
Answer: Option C. -> fluorine
Fluorine is the most electronegative element and also the most reactive non-metal.
Fluorine is the most electronegative element and also the most reactive non-metal.
Answer: Option D. -> Fe
The metal used to recover copper from a solution of copper sulphate is Fe.
The metal used to recover copper from a solution of copper sulphate is Fe.
Answer: Option D. -> 10 electron
l = 2 corresponds to d orbitals which can take upto 10 electrons.
l = 2 corresponds to d orbitals which can take upto 10 electrons.
Answer: Option B. -> Anderson
In 1932 Carl Anderson, a young professor at the California Institute of Technology in the US, was studying showers of cosmic particles in a cloud chamber and saw a track left by "something positively charged, and with the same mass as an electron".
In 1932 Carl Anderson, a young professor at the California Institute of Technology in the US, was studying showers of cosmic particles in a cloud chamber and saw a track left by "something positively charged, and with the same mass as an electron".
Answer: Option C. -> X-rays
When cathode rays strike a solid target of high atomic weight and high melting point such as tungsten, molybdenum, etc, they give rise to a highly penetrating radiation called the X-rays (LIT Physics by Dr. P.K Agarwal).
When cathode rays strike a solid target of high atomic weight and high melting point such as tungsten, molybdenum, etc, they give rise to a highly penetrating radiation called the X-rays (LIT Physics by Dr. P.K Agarwal).
Answer: Option B. -> Spin quantum number
Spin quantum number is the is the fourth quantum number that differentiates two electrons in the same orbital. The Pauli exclusion principle states that “no two electrons in an atom can have the same four quantum numbers. This means that no two electrons can have the same state in an atom. Each electron must have a different spin or occupy a different shell from any other.
Spin quantum number is the is the fourth quantum number that differentiates two electrons in the same orbital. The Pauli exclusion principle states that “no two electrons in an atom can have the same four quantum numbers. This means that no two electrons can have the same state in an atom. Each electron must have a different spin or occupy a different shell from any other.
Answer: Option D. -> 10
10 electrons can be accommodated in d-orbital.
10 electrons can be accommodated in d-orbital.
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