MEDIUM
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Which psychological disorder involves unwanted repetitive thoughts and actions?

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Important Questions on Atoms

MEDIUM
Define pollination. Explain wind and water pollination with example.
HARD
Self pollination is fully ensured if
EASY
What is emasculation?
EASY
The ratio of wavelengths of the last line of the Balmer series and the last line of the Lyman series is_____.
EASY
Which one of the following may require pollinators, but is genetically similar to autogamy?
EASY
In Balmer series for hydrogen atom, find the energy of photon corresponding to longest wavelength.
HARD
Differentiate between wind pollinated and insect pollinated flowers.
EASY
A childless couple can be assisted to have a child through a technique called GIFT. The full form of this techniques is:
EASY
Flowers which have single ovule in the ovary and are packed into inflorescence are usually pollinated by
EASY
Attractants and rewards are required for:
EASY
An electron from various excited states of hydrogen atom emit radiation to come to the ground state. Let λn, λg be the de Broglie wavelength of the electron in the nth state and the ground state respectively. Let n be the wavelength of the emitted photon in the transition from the nth state to the ground state. For large n, (A, B are constants)
EASY
Name the source plant of heroin drug. How is it obtained from the plant?
HARD
Explain the different types of spectral series.
EASY
Given the value of Rydberg constant is 107 m-1, the wave number of the last line of the Balmer series in hydrogen spectrum will be:
MEDIUM
The electron in a hydrogen atom passes from n=4 energy level to n=1 energy level. What is the maximum number of photons that can be emitted?
MEDIUM
Would you consider Gamete Intra-fallopian Transfer (GIFT) as an IVF? Give a reason in support of your answer.
MEDIUM
IVF is a very popular method these days that is helping childless couples to bear a child. Describe the different steps that are carried out in this technique.
EASY
Geitonogamy involves
EASY
Write the effects of heroin on the human body.
EASY
Drug called 'Heroin' is synthesized by: