The average salinity of sea water is________?
The average salinity of sea water is________?
A. 3%
B. 3.5%
C. 2.5%
D. 2%
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The number amino acid units for each turn of helix on average are____________________?
The number amino acid units for each turn of helix on average are____________________?A. 21
B. 23
C. 25
D. 27Which statement is wrong ?
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 stratosphereWhich one is not a nucleophile ?
Which one is not a nucleophile ?A. C2H5O-
B. SCN-
C. NH3
D. H3C+Which one of the following is most acidic?
Which one of the following is most acidic?A. Phenol
B. P-nitrophenol
C. O-nitrophenol
D. M-nitrophenolThe relative attraction of the nucleus for the electrons in a chemical bond is called _________________?
The relative attraction of the nucleus for the electrons in a chemical bond is called _________________?A. Ionization energy
B. Electron affinity
C. Electro negativity
D. None of the aboveThe spreading of fragrance or scent in air is due to_______________?
The spreading of fragrance or scent in air is due to_______________?A. Diffusion
B. Effusion
C. Attraction with air
D. Low dsensity