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
CHEMISTRY
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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
All the following variables are used to describe gases except__________________?
A. pressure
B. volume
C. moles
D. density
Submitted by :- Jamil Ahmed
The nucleus of an atom of every element will always contain____________________?
A. neutrons
B. protons and electrons
C. protons
D. protons and neutrons
Submitted by :- Jamil Ahmed
Which of the following methods is used to estimate hydrogen in an organic compound ?
A. Combustion method
B. Dumas method
C. Kjeldahls method
D. All of the above methods are for different purposes
Submitted by :- Jamil Ahmed
Isotopes differ in_________________?
A. properties which depend upon mass
B. arrangement of electrons in orbitals
C. chemical properties
D. all of the above
Submitted by :- Jamil Ahmed