Which of the following is not a macromolecule ?
A. sand
B. hemoglobin
C. diamond
D. maltose
Submitted by :- Jamil Ahmed
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. Atomic masses are average masses of isotopes proportional to their relative abundance
D. Atomic masses are average masses of isotopes
Submitted by :- Jamil Ahmed
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
Submitted by :- Jamil Ahmed
Which one of the following is not the mono isotopic element ?
A. arsenic
B. uranium
C. iodine
D. nickel
Submitted by :- Jamil Ahmed
Which of the following terms is used for the mass of chlorine 35.5 ?
A. relative atomic mass
B. mass number
C. atomic weight
D. relative isotopic mass
Submitted by :- Jamil Ahmed
Size of molecule depends upon________________?
A. Atomicity
B. Shape of molecule
C. Both A and B
D. Difficult to predict
Submitted by :- Jamil Ahmed
Avogadro’s number may represent_________________?
A. volume of particles
B. number of particles
C. mass of particles
D. All of the above
Submitted by :- Jamil Ahmed
Molecular ions are formed by passing______________________?
A. High energy electron beam
B. alpha particle
C. X-rays
D. All of the above
Submitted by :- Jamil Ahmed
Which of the following are isoelectronic species ?
A. H+ H H-
B. Li+ Na+ K+
C. C1- Br- I
D. F- Ne Na+
Submitted by :- Jamil Ahmed
1 a.m.u =__________________?
A. 1.6 x 10^-27 kg
B. 1.6 x 10^-24 kg
C. 1.6 x 10^-26 kg
D. 1.6 x 10^-28 kg
Submitted by :- Jamil Ahmed