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A physical quantity of the dimensions of length that can be formed out of c, G and \frac{{\text{e}^2 }} {{4\,\pi \in _0 }} is [c is velocity of light, G is universal constant of gravitation and e is charge]:

Option: 1

\therefore L=\frac{1}{C^{2}}\left[G\frac{e^{2}}{4\pi \epsilon_{0}} \right ]^{1/2}


Option: 2

L=\frac{1}{C}\left[G\frac{e^{2}}{4\pi \epsilon_{0}} \right ]^{1/2}


Option: 3

L=\frac{1}{C^{2}}\left[\frac{e^{2}}{4G\pi \epsilon_{0}} \right ]


Option: 4

\therefore L=\frac{1}{C}\left[G\frac{e^{2}}{4\pi \epsilon_{0}} \right ]


Select the mismatch :

Option: 1

Frankia    -    Alnus


Option: 2

Rhodospirillum    -    Mycorrhiza


Option: 3

Anabaena    -    Nitrogen fixer


Option: 4

Rhizobium    -    Alfalfa


Which is essential for the growth of root tip?

Option: 1

Zn


Option: 2

Fe


Option: 3

Ca


Option: 4

Mn


The catalytic activity of transition metals and their compounds is ascribed mainly to:

Option: 1

their unfilled d - orbitals


Option: 2

their ability to adopt variable oxidation states


Option: 3

their chemical reactivity


Option: 4

their magnetic behavior


Placentation in tomato and lemon is

Option: 1

Parietal


Option: 2

Free central


Option: 3

Marginal


Option: 4

Axile


Which one of the following statements regarding Photochemical smog is not correct?

Option: 1

Carbon monoxide does not play any role in photochemical smog formation.


Option: 2

Photochemical smog is an oxidising agent in character.


Option: 3

Photochemical smog is formed through photochemical reaction involving solar energy.


Option: 4

Phototochemical smog does not cause irritation in eyes and throat


A particle covers half of its total distance with speed V1 and the rest half distance with speed V2. Its average speed during the complete journey is

Option: 1

\frac{V_{1}V_{2}}{V_{1}+V_{2}}


Option: 2

\frac{2V_{1}V_{2}}{V_{1}+V_{2}}


Option: 3

\frac{2V_{1}^{2}V_{2}^{2}}{V_{1}^{2}+V_{2}^{2}}


Option: 4

\frac{V_{1}+ V_{2}}{2}


The barrier potential of a p - n junction depends on :

(a) type of semi conductor material

(b) amount of doping

(c) temperature

Which one of the following is correct?

Option: 1

(a) and (b) only


Option: 2

(b) only


Option: 3

(b) and (c) only


Option: 4

(a),(b) and (c)


Select the correct matching in the following pairs:

Option: 1

Rough ER - Synthesis of glycogen


Option: 2

Rough ER - Oxidation of fatty acids


Option: 3

Smooth ER - Oxidation of phospholipids


Option: 4

Smooth ER - Synthesis of lipids


Select the correct option:

 

  I   II
(a) Synapsis aligns homologous chromosomes (i)

Anaphase-II
(b) Synthesis of RNA and protein (ii)

Zygotene
(c) Action of enzyme recombinase (iii)

G2-phase
(d) Centromeres do not separate but chromatids move towards opposite poles (iv)

Anaphase-I
    (v) Pachytene

(a)    (b)    (c)    (d)

Option: 1
(i)    (ii)    (v)    (iv)

Option: 2

(ii)    (iii)    (iv)    (v)


Option: 3

(ii)    (i)    (iii)    (iv)


Option: 4

(ii)    (iii)    (v)    (iv)


Two metal wires of identical dimensions are connected in series. If \sigma _1 and \sigma _2 are the conductivities of the metal wires respectively, the effective conductivity of the combination is :

Option: 1

\frac{{\sigma _1 + \sigma _2 }} {{2\sigma _1 \sigma _2 }}


Option: 2

\frac{{\sigma _1 + \sigma _2 }} {{\sigma _1 \sigma _2 }}


Option: 3

\frac{{\sigma _1 \sigma _2 }} {{\sigma _1 + \sigma _2 }}


Option: 4

\frac{{2\sigma _1 \sigma _2 }} {{\sigma _1 + \sigma _2 }}


Peripatus is a connecting link between:

Option: 1

Mollusca and Echinodermata


Option: 2

Annelida and Arthropoda


Option: 3

Coelenterata and Porifera


Option: 4

Ctenophora and Platyhelminthes


Foetal ejection reflex in human female is induced by:

Option: 1

release of oxytocin from pituitary


Option: 2

fully developed foetus and placenta


Option: 3

differentiation of mammary glands


Option: 4

pressure exerted by amniotic fluid


Which one of the following is considered important in the development of seed habit?

Option: 1

Heterospory


Option: 2

Haplontic life cycle


Option: 3

Free-living gametophyte


Option: 4

Dependent sporophyte


In barley stem vascular bundles are: 

Option: 1

closed and scattered


Option: 2

open and in a ring


Option: 3

closed and radial


Option: 4

open and scattered


Reduction in vascular tissue, mechanical tissue and cuticle is characteristic of:

Option: 1

Mesophytes


Option: 2

Epiphytes


Option: 3

Hydrophytes


Option: 4

Xerophytes


The half-life period of a first-order reaction is 1386 seconds. The specific rate constant of the reaction is:

Option: 1

0.5 x 10-2 s-1


Option: 2

0.5 x 10-3 s-1


Option: 3

5.0 x 10-2 s-1


Option: 4

5.0 x 10-3 s-1


The dissociation constants for acetic acid and HCN\ at\ 25^oC are 1.5 \times 10^{-5}  and 4.5 \times 10^{-10} respectively. The equilibrium constant for the equilibrium \text{CN}^{-}+\text{CH}_{3}\text{COOH}\rightleftharpoons \text{HCN}+\text{CH}_{3}\text{COO}^{-} would be:

Option: 1

3.0 \times 10^{- 5}


Option: 2

3.0 \times 10^{- 4}


Option: 3

3.0 \times 10^4


Option: 4

3.0 \times 10^5


The values of \DeltaH and \DeltaS for the reaction, \text{C}_{\text{graphite}}+\text{CO}_{2(\text{g})}\longrightarrow 2\text{CO}_{(\text{g})} are 170 kJ and 170 JK-1 , respectively. This reaction will be spontaneous at

Option: 1

910K


Option: 2

1110K


Option: 3

510K


Option: 4

710K


Structures of some common polymers are given. Which one is not correctly presented?

 

Option: 1

Neoprene


Option: 2

Terylene


Option: 3

Nylon 66


Option: 4

Teflon


The mass number of a nucleus is 

Option: 1

sometimes less than and sometimes more than its atomic number


Option: 2

always less than its atomic number


Option: 3

always more than its atomic number


Option: 4

sometimes equal to its atomic number


Which of the following plant species you would select for the productioon of bioethanol?

Option: 1

Trichoderma harianum


Option: 2

Nuclear Polyhedrosis Virus (NPV)


Option: 3

Xanthomonas campestris


Option: 4

Bacillus thuringiensis


Which of the following molecules acts as a Lewis acid?

Option: 1

\left ( CH_{3} \right )_{2}O


Option: 2

\left ( CH_{3} \right )_{3}P


Option: 3

\left ( CH_{3} \right )_{3}N


Option: 4

\left ( CH_{3} \right )_{3}B


AB crystallizes in a body centred cubic lattice with edge length 'a' equal to 387 pm. The distance between two oppositely charged ions in the lattice is :

Option: 1

300 pm


Option: 2

335 pm


Option: 3

250 pm


Option: 4

200 pm


Which one of the following statements about certain given animals is correct?

Option: 1

Flat worms (Platyhelminthes) are coelomates


Option: 2

Round worms (Aschelminthes) are pseudocoelomates


Option: 3

Molluses are acoelomates


Option: 4

Insects are pseudocoelomates


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