When the value of Kc is very small then_______________________?
A. reaction is at start
B. product conc. Is maximum
C. reactant conc. Is minimum
D. reaction is completed
Submitted by :- Jamil Ahmed
In case of gases Kc is replaced by_______________?
A. Ka
B. Kb
C. Kp
D. K
Submitted by :- Jamil Ahmed
At start of reaction the concentration of reactants is_______________?
A. high
B. low
C. according to Kc
D. constant
Submitted by :- Jamil Ahmed
Chemical equilibrium state is_______________?
A. dynamic state
B. static state
C. free state
D. unidirectional state
Submitted by :- Jamil Ahmed
Which substance can be used for disinfecting water ?
A. KMnO4
B. Alums
C. Ozone
D. All
Submitted by :- Jamil Ahmed
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