The alleles that cause uncles to care for nephews will spread, when cost value is 30, according to Hamilton’s Rule altruistic only only if the fitness benefit is

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#Question id: 20207

#XL - P Chemistry

If wavelength of photon is 2·2 × 10 ^{– 11}m, h = 6·6 × 10^–34 Js, then momentum of photon is

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#Question id: 20208

#XL - P Chemistry

The wave number of first line of Balmer series of hydrogen is 15200 cm^–1. The wave number of the first Balmer line of Li¹⁺ ion is

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#Question id: 20209

#XL - P Chemistry

Which of the following is violation of Pauli’s exclusion principle ?

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#Question id: 20210

#XL - P Chemistry

The electrons, identified by quantum number n and (i) n = 4, = 1 (ii) n = 4, = 0 (iii) n = 3, = 2 (iv) n = 3, = 1 can be placed in order of increasing energy, from the lowest to

highest, as

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#Question id: 20211

#XL - P Chemistry

The wave length associated with a golf ball weighing 200 g and moving at a speed of 5 m/h is of the order

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#Question id: 20212

#XL - P Chemistry

If the nitrogen atom had electronic configuration 1s⁷, it would have energy lower than that of the normal ground state configuration 1s² 2s₂ 2p³ because the electrons would be closer to the nucleus. Yet, 1s⁷ is not observed because it violates.