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Ionisation potential of hydrogen atom is 13.6 eV. Hydrogen atom in ground state is excited by monochromatic light of energy 12.1 eV. The spectral lines emitted by hydrogen according to Bohr's theory will be

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Differentiate between binary fission and multiple fission.

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A tuning fork of frequency 512 Hz makes 4 beats per second with tire vibrating string of a.piano. The beat frequency decreases to 2 beats per sec when the tension in the piano string is slightly increased. The frequency of the piano string before increasing the tension was

asked Dec 21, 2021 in CBSE by kritika (90.1k points)

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The region in the electromagnetic spectrum where the Balmer series lines appear is

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Grooming is a term associated with

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What happens when nitric acid is added to an egg shell?

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The transition metal exhibit variable oxidation states. Explain

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ame the organelle, which acts as storage sacs of the cell.

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Plastic cups were used to serve tea in trains in early days- these could be returned to the vendors, cleaned and reused. Later,Kulhads were used instead of plastic cups. Now, paper cups are used for serving tea. What are the reasons for the shift from Plastic to Kulhads and then finally to paper cups?

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What does Green symbolize in BCG matrix?

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The objective of network analysis is to:

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A choke coil has

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A spring balance can be used to measure

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(a) Why are covalent compounds generally poor conductors of electricity? (b) Name the following compound: (c) Name the gases evolved when ethanoic ‘ acid is added to sodium carbonate. How would you prove the presence of this gas?

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Identify the correct statement

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Financial accounting deals with:

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Write a negative integer and a positive integer whose difference is -3.

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A glucose solution which boils at \(101.04^{\circ} \mathrm{C}\) at \(1 \mathrm{~atm}\). What will be relative lowering of vapour pressure of an aqueous solution of urea which is equimolal to given glucose solution? (Given: \(\mathrm{K}_{\mathrm{b}}\) for water is \(0.52 \mathrm{~K} \mathrm{~kg} \mathrm{~mol}^{-1}\) )

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Which of the following is an acid-base indicator?

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