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.Management Sciences
Category: Chemistry Basic Concept
Which of the following molecule is polar__________________?
0
A. CCI4
B. CO2
C. BF3
D. none of the above
Which of the following element doesnot show allotropy_________________?
A. Carbon
B. Arsenic
C. Nitrogen
D. Sulphur
Molecular ions are formed by passing______________________?
A. High energy electron beam
B. ? – particle
C. X-rays
D. All of the above
A solution has pH = 0 its H+ ion concentration is__________________?
A. 1 x 10-1
B. 1 x 10-14
C. 1 x 10-7
D. 1
Which of the elements do not fall in stair case of the modern periodic table__________________?
A. Si
B. As
C. Te
D. None of the above
The compound which is added to leaded gasoline to save engine from lead oxide and lead sulphate deposits is__________________?
A. Ethylene iodide
B. Ethylene bromide
C. Ethylene chloride
D. Ethylene fluoride
Which of the solid does not contain covalent bond__________________?
A. copper
B. ice
C. diamond
D. graphite
The mass of decimole of electrons (NA) is___________________?
A. 1.008 mg
B. 0.184 mg
C. 0.054 mg
D. 5.4 mg
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