12
MCQ (Single Correct Answer)
Which of the following practices will not come under green chemistry?
A
If possible, making use of soap made of vegetable oils instead of using synthetic detergents
B
Using $\mathrm{H}_2 \mathrm{O}_2$ for bleaching purpose instead of using chlorine based bleaching agents
C
Using bicycle for travelling small distances instead of using petrol/ diesel based vehicles
D
Using plastic cans for neatly storing substances
13
MCQ (Multiple Correct Answer)
Which of the following conditions shows the polluted environment?
A
pH of rain water is 5.6
B
Amount of carbon dioxide in the atmosphere is $0.03 \%$
C
Biochemical oxygen demand 10 ppm
D
Eutrophication
14
MCQ (Multiple Correct Answer)
Phosphate containing fertilisers cause water pollution. Addition of such compounds in water bodies causes ............... .
A
enhanced growth of algae
B
decrease in amount of dissolved oxygen in water
C
deposition of calcium phosphate
D
increase in fish population
15
MCQ (Multiple Correct Answer)
The acids present in acid rain are ............. .
A
PeroxyacetyInitrate
B
$\mathrm{H}_2 \mathrm{CO}_3$
C
$\mathrm{NHO}_3$
D
$\mathrm{H}_2 \mathrm{SO}_4$
16
MCQ (Multiple Correct Answer)
The consequences of global warming may be .......... .
A
increase in average temperature of the earth
B
melting of Himalayan Glaciers
C
increased biochemical oxygen demand
D
eutrophication