A set of atoms in an excited state decays:
Anonymous Quiz
71%
In general to any of the states with lower energy.
29%
Into a lower state only when excited by an external electric field.
0%
All together simultaneously into a lower state.
0%
To emit photons only when they collide.
0%
Alkali metals displace hydrogen from water forming bases due to the reason that
Anonymous Quiz
25%
They are far above the hydrogen in electrochemical series based on oxidation potential.
50%
They are far below the hydrogen in electrochemical series based on oxidation potential.
25%
Their ionization enthalpy is less than that of other elements.
0%
They contain only one electron in their outermost shell.
0%
Pusa sadabahar a variety of chilli is resistant to ____
Anonymous Quiz
17%
Chilly mosaic virus
17%
Tobacco mosaic virus
17%
Leaf curl
50%
All of these
0%
Which of the following statement is incorrect?
Anonymous Quiz
20%
RMS velocity depends on the molecular weight of the gas.
0%
R.M.S. velocity depends on temperature of the gas.
60%
R.M.S. velocity depends on the number of molecules present in unit volume.
20%
R.M.S velocity is greater than average velocity and most probable velocity.
0%
What is the total number of biodiversity hotspots in the world
Anonymous Quiz
10%
3
10%
9
30%
25
50%
34
0%
In a reflecting telescope, a secondary mirror is used to
Anonymous Quiz
0%
reduce the problem of mechanical support
100%
move the eyepiece outside the telescopic tube
0%
remove spherical aberration
0%
make chromatic aberration zero.
0%
Which of the following statements is true?
Anonymous Quiz
0%
The total entropy of the universe remains constant.
11%
The total entropy of the universe is continuously decreasing.
44%
The total energy of the universe is continuously decreasing.
44%
The total energy of the universe remains constant.
0%
DNA polymorphism forms the basis of :<br>
Anonymous Quiz
0%
DNA finger printing
80%
Both genetic mapping and DNA finger printing
0%
Translation
20%
Genetic mapping
0%
A galvanometer acting as a voltmeter should have
Anonymous Quiz
0%
low resistance in series with its coil
0%
low resistance in parallel with its coil
100%
high resistance in series with its coil
0%
high resistance in parallel with its coil
0%
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A normal woman whose father was colourblind, is married to a normal man. The sons would be
Anonymous Quiz
0%
75% colourblind
0%
All normal
100%
50% colourblind
0%
All colourblind
0%
Which method is considered a barrier method of contraception?
Anonymous Quiz
22%
Copper T
0%
Oral pills
78%
Condoms
0%
Tubectomy
0%
NADP is used in
Anonymous Quiz
63%
Photosynthesis
13%
Respiratory Kreb's cycle
13%
Glycolysis
13%
Both (1) and (3)
0%
Which technique is used for selecting desirable recombinants?
Anonymous Quiz
0%
Electrophoresis
20%
ELISA
80%
Marker assisted selection
0%
Tissue culture
0%
Which of the following is an example of polygenic inheritance?
Anonymous Quiz
33%
Skin color in humans
33%
Blood group in humans
33%
ABO blood system
0%
Rh factor
0%
In the_____ method of contraception ovum and sperms are prevented from physically meeting
Anonymous Quiz
0%
Natural
25%
Sterilization
75%
Barrier
0%
Pills
0%
Which one of the following is not associated with the total internal reflection?
Anonymous Quiz
0%
The mirage formation
0%
Optical fibre communication
33%
The glittering of diamond
67%
Dispersion of light
0%
Select the incorrect statement about Liliaceae from the following?
Anonymous Quiz
0%
Perennial herbs with underground rhizomes
50%
Placenta swollen with many ovules
0%
Leaves are mostly basal with parallel venation
50%
Bisexual, Actinomorphic flower
0%
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Proximal end of the filament of stamen is
attached to the:
attached to the:
Anonymous Quiz
0%
Anther
0%
Connective
20%
Placenta
80%
Thalamus or petal
0%
During inelastic collision between two bodies, which of the following quantities always remain conserved?
Anonymous Quiz
67%
Total linear momentum
17%
Speed of each body
0%
Total kinetic energy
17%
Total mechanical energy
0%