91Ó°ÊÓ

Biosphere includes: (a) Plants and animals (b) Rocks and minerals (c) Atmosphere and lithosphere (d) Water sources

The major components of the atmosphere are: (a) \(\mathrm{CO}_{2}\) and \(\mathrm{N}_{2}\) (b) \(\mathrm{O}_{3}\) and \(\mathrm{SO}_{2}\) (c) \(\mathrm{CO}\) and \(\mathrm{CO}_{2}\) (d) \(\mathrm{N}_{2}\) and \(\mathrm{O}_{2}\)

Among the following compounds, the strongest acid is: (a) \(\mathrm{HC} \equiv \mathrm{CH}\) (b) \(\mathrm{C}_{6} \mathrm{H}_{6}\) (c) \(\mathrm{C}_{2} \mathrm{H}_{6}\) (d) \(\mathrm{CH}_{3} \mathrm{OH}\)

The upper most region of the atmosphere is: (a) Troposphere (b) Exosphere (c) Stratosphere (d) Ionosphere

The point of temperature inversion between troposphere and ionosphere is called: (a) Mesopause (b) Stratopause (c) Ionopause (d) Tropopause

Antidote of Lewsite is: (a) 3, 3-dimercaptopropan-1-ol (b) 2 -mercaptopropan-1, 3 -diol (c) 2,3 -dimercaptopropan-1-ol (d) 2, 2-dimercaptopropan-1-ol

The number of possible enantiomeric pairs that can be produced during monochlorination of 2 -methyl butane are: (a) 2 (b) 3 (c) 4 (d) 1

BOD is connected with: (a) Microbes (b) Organic matter (c) Both (a) and (b) (d) None of these

Biodegradable pollutant is: (a) DDT (b) Domestic waste (c) Aluminium foil (d) Mercury salt

Acetylene and HCHO react in the presence of copper acetylide catalyst to form: (a) 2 -butyne- 1,4 -diol (b) but-2-yne-1, 2-diol (c) but-1-yne-1, 4-diol (d) None of these