3
MCQ (Single Correct Answer)
The material generally used for sound proofing of rooms like a recording studio and auditorium etc., is
A
cotton
B
coir
C
wood
D
styrofoam
4
MCQ (Single Correct Answer)
Compressed Natural Gas (CNG) is
A
propane
B
methane
C
ethane
D
butane
5
MCQ (Single Correct Answer)
World's most problematic aquatic weed is
A
Azolla
B
Wolffia
C
Eichhornia
D
Trapa
6
MCQ (Single Correct Answer)
Which of the following causes biomagnification?
A
$\mathrm{SO}_2$
B
Mercury
C
DDT
D
Both (b) and (c)
7
MCQ (Single Correct Answer)
The expanded form of DDT is
A
dichloro diphenyl trichloroethane
B
dichloro diethyl trichloroethane
C
dichloro dipyrydyl trichloroethane
D
dichloro diphenyl tetrachloroacetate