When the two antiparallel strands of DNA are held together partly by the weak forces between complementary bases and partly by hydrophobic interaction between adjacent , stacked base pairs termed as_____

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#Question id: 20166

#XL - P Chemistry

The total number of orbitals in a shell with principal quantum number ‘n’ is

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#Question id: 20167

#XL - P Chemistry

Which of the following expressions gives the de-Broglie relationship ?

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#Question id: 20168

#XL - P Chemistry

The uncertainty in the momentum of an electron is 1·0 × 10^–5 kg ms^–1. The uncertainty in its position will be (h = 6·62 x 10^–34 kg m2s^–1)

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#Question id: 20169

#XL - P Chemistry

If the radius of first Bohr orbit be a0, then the radius of third Bohr orbit would be

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#Question id: 20170

#XL - P Chemistry

The first emission line in the atomic spectrum of hydrogen in the Balmer series appears at

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#Question id: 20171

#XL - P Chemistry

The ratio of specific charge of a proton and an Alpha particle is