A gas is pale blue in colour on liquifaction, the colour arises from electronic transitions. This transition is forbidden in gaseous state. The gas does not burn but is a strong supported of combustion. Given the molar mass of this gas.
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There are two urns `Aa n dB` . Urn `A` contains 5 red, 3 blue and 2 white balls, urn `B` contains 4 re3d, 3 blue, and 3 white balls. An urn is chosen
Correct Answer - D Let A nad B, respectively, be the events that urn A and urn B are selected.Let R be the event that the selected ball is red. Since...
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In a hypothetical hydrogen-like atom the wavelength in A° for the spectral lines for transitions from `n = P` to `n = 1` are given by `lambda = (1500
Correct Answer - `-8.28 eV, -2.07 eV, -0.92 eV`. Ionization Potential `= 8.28 eV`
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A boy has a collection of blue and green marbles. The number of blue marbles belong to the set `{2,3,4,…..,13}`. If two marbles are chosen simultaneou
Correct Answer - A::B::C `(a,b,c)` Let the no. of blue marbles is `a` and no. of green marbles is `b` . `:.(ab)/("^(a+b)C_(2))=(1)/(2)` `implies(a+b)(a+b-1)=4ab` `impliesb^(2)-(2a+1)b+a^(2)-a=0` but `b in R implies D=(2a+1)^(2)-4(a^(2)-a)=8a+1` `:....
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1. 1st Transition stage : Low growth of population : : 2nd Transition stage : ____________
1. High growth of population 2. Illiteracy 3. 2000 4. Improving the status of women 5. Thomas Robert Malthus
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1. Technological unemployment arises because of ___________
1. changes in technology 2. machinery, power failure, strikes, etc. 3. Full employment 4. less than 14 hours per week 5. invisible unemployment
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Identify the correct correlation: Birds, Locations , Pale crag martin, Savannah Grassland Biome
Birds Locations (i) Pale crag martin (e) Tropical Desert Biome (ii) Ostriches (a) Savannah Grassland Biome (iii) Peregrine (b) Temperate Deciduous Biome (iv) Ptarmigan (c) Tundra Biome
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Depreciation arises because of _________
Correct option is (a) wear and tear
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The phenomenon of radioactivity arises from the
The correct option is (D) Decay of unstable nuclei.
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Pulmonary artery which supplies deoxygeriatecT blood to the lungs arises from …………
A) right ventricle
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The sky appears blue because some of the blue component of sunlight is scattered by
A) gas molecules present in air
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