UGC NET Environmental Science 2014 Paper III

UGC NET June 2021 exam for JRF & Assistant Professor exam will be conducted on 29th Jan 2022 and 06th Feb 2022. If you are searching NET previous year papers, then you are at right place. Here, we are providing UGC NET Environmental Science Previous year paper with answer for your ready reference.

Which of the following ranges of scale lengths represents meso-scale motions in atmosphere?
(a) 30 km – 400 km
(b) 500 m – 10 km
(c) 1 km – 2 km
(d) 100 m – 1 km

Ans- (a)

Rayleigh scattering in the atmosphere is caused by
(a) molecules larger than the wavelength
(b) molecules equal to the size of wavelength
(c) molecules whose size is much smaller than the wavelength
(d) molecules and particles of all sizes

Ans- (c)

Wind rose is a
(a) graphical representation of wind velocity vector over a period of time in a polar diagram
(b) graphical representation of wind velocity vector in a spherical coordinate system over a period of time
(c) graphical representation of horizontal and vertical wind speeds over a period of time in polar diagram.
(d) graphical representation of instantaneous wind velocity at a particular time.

Ans- (a)

The key groups of organic molecules that help in chelation of metal ions are
(I) -COOH
(II) -SH
(III) -CH3
(IV) -CHO
choose the correct answer from the codes given below
(a) I only
(b) I and II only
(c) II, III and IV only
(d) I, II and IV only

Ans- (d)

Geostrophic winds are the result of the balance between
(a) coriolis force and pressure gradient force
(b) coriolis force and centrifugal force
(c) pressure gradient force and frictional force
(d) pressure gradient force and centrifugal force

Ans- (a)

A possible mechanism for photochemical smog inhibition is to add compounds like diethylhydroxylamine (DEHA) as it reacts with
(a) hydrocarbon
(b) nitrogen dioxide
(c) PAN
(d) hydroxyl radicals

Ans- (d)

In the determination of sulphur dioxide by p-rosaniline method, the end product is
(a) p-rosaniline sulfonic acid
(b) methil p-rosaniline
(c) p-rosaniline methyl sulfonic acid
(d) sulfo methyl p-rosaniline

Ans- (c)

Beer- Lamber’s law defines
(a) The degree of absorption of monochromatic light by a homogeneous medium
(b) Atomic absorption spectophotometry
(c) Atmoic emission spectrophotometry
(d) Gas chromatography

Ans- (a)

Chemically phytochelatins are
(a) Proteins
(b) Polysaccharides
(c) Lipids
(d) Polypetides

Ans- (d)

Return of an ecosystem to a condition prior to disturbance refers to as
(a) Rehabilitation
(b) Restoration
(c) Rejuvenation
(d) Reclaimation

Ans- (b)