Chemistry MCQs
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Question 64hard
The number of electrons presents in H+ is
Question 65medium
The hottest part of the gas flame is known as
Question 66hard
The human body is made up of several chemical elements; the element present in the highest proportion (65%) in the body is
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Question 67medium
The isomerism which exists between CH3CHCI2 and CH2CI. CH2CI is
Question 68hard
The half life period of an isotope is 2 hours. After 6 hours what fraction of the initial quantity of the isotope will be left behind?
Question 69hard
The number of waves made by an electron moving in an orbit having maximum magnetic quantum number is +3
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Question 70hard
The number of atoms present in 21.6 gram of silver (atomic weight = 108) are same as the molecules in
Question 71medium
The National Chemical Laboratory is situated in
Question 72hard
Equal masses of oxygen, hydrogen and methane are kept under identical conditions. The ratio of the volumes of gases will be