When cationic molecular ions are allowed to pass through strong magnetic field in mass spectrometer which of the following ions is fallen
A. lighter
B. intermediate
C. heavier
D. are collected at same time
Chemistry
Isotopes of the same elements has
A. different number of protons
B. same number of neutrons
C. different number of neutrons
D. same mass number (nucleon number)
Isotopes of the same elements has Read More »
Which of the following is not a macromolecule?
A. sand
B. haemoglobin
C. diamond
D. maltose
Which of the following is not a macromolecule? Read More »
Mostly elements have fractional atomic masses because of
A. Mass of an atom itself is in fraction
B. Atomic masses are average masses of isobars
C. Atmoic masses are average masses of isotopes proportional to their relative abundance
D. Atmoic masses are average masses of isotopes
Mostly elements have fractional atomic masses because of Read More »
Percentage of calcium in calcium carbonate is
A. 80%
B. 30%
C. 40%
D. 20%
Percentage of calcium in calcium carbonate is Read More »
How many isotopes have odd atomic number ?
A. 154
B. 280
C. 86
D. 300
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The volume occupied by 2.8 g of N2 at STP
A. 2.24 dm3
B. 22.4 dm3
C. 1.12 dm3
D. 112 dm3
The volume occupied by 2.8 g of N2 at STP Read More »
Which of the following has the maximum number of isotopes?
A. oxygen
B. carbon
C. tin
D. chlorine
Which of the following has the maximum number of isotopes? Read More »