Which substance can be used for disinfecting water ?
A. KMnO4
B. Alums
C. Ozone
D. All
Submitted by :- Jamil Ahmed
CHEMISTRY
Prepare for your upcoming test with a comprehensive collection of Chemistry multiple-choice questions (MCQs), ranging from basic to advanced topics. These Chemistry MCQs cover various sections of the subject, providing you with valuable practice and boosting your chances of scoring well in the Chemistry portion of the test. Whether you’re a student or a job seeker preparing for exams, these MCQs will prove beneficial for your test preparation.
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The main pollutant of leather tanneries in the waste water is____________?
A. chromium III
B. chromium IV
C. chromium V
D. chromium VI
Submitted by :- Jamil Ahmed
Newspaper can be recycled again and again how many times ?
A. 2
B. 3
C. 4
D. 5
Submitted by :- Jamil Ahmed
In the purification of portable water the coagulant used is_________________?
A. alum
B. nickel sulphate
C. copper sulphate
D. barium sulphate
Submitted by :- Jamil Ahmed
Which statement is wrong ?
A. the amount of ozone layer is greater in the region close to the equator
B. ozone acts as filter for UV radiations
C. in the equatorial region it acts as pollutant
D. CFCs play effective role in removing O3 in the stratosphere
Submitted by :- Jamil Ahmed
Which of the following air pollutants is more dangerous for ozone layer ?
A. CFC
B. CO2
C. CO
D. Oxides of nitrogen
Submitted by :- Jamil Ahmed
In which of the following layer of atmosphere there is more thickness of ozone layer ?
A. troposphere
B. stratosphere
C. mesosphere
D. photosphere
Submitted by :- Jamil Ahmed
Which of the following is not a condition for the formation of smog ?
A. sufficient NO
B. sunlight
C. less movement of air
D. winds
Submitted by :- Jamil Ahmed
Acid present in acid rain may be__________________?
A. H2SO4
B. HNO3
C. both A and B
D. none
Submitted by :- Jamil Ahmed
Hypochlorous acid is used for disinfecting the water it reacts with the dissolved ammonia producing___________________?
A. NH2Cl
B. NHCI2
C. NCI2
D. all of the above
Submitted by :- Jamil Ahmed