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Ncert Solutions Chemistry Class 12th

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Ncert Solutions Chemistry Class 12th Class 12th

The metal mainly used in devising photoelectric cells is:

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Ncert Solutions Chemistry Class 12th Class 12th

Consider the following reactions

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Raj Pandey

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Kindly consider the following Image

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Ncert Solutions Chemistry Class 12th Class 12th

The major product in the following reaction is :

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Raj Pandey

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Kindly consider the following Image

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Ncert Solutions Chemistry Class 12th Class 12th

An open beaker of water in equilibrium with water vapour is in a sealed container. When a few grams of glucose are added to the beaker of water, the rate at which water molecules:

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Raj Pandey

Contributor-Level 9

The vapour pressure of solution will be less than vapour pressure of pure solvent, so some vapour molecules will get condensed to maintain new equilibrium.

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Ncert Solutions Chemistry Class 12th Class 12th

Which of the following is used for the preparation of colloids?

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Raj Pandey

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Bredig's Arc Method is used for preparation of colloidal sol's of less reactive metal like Au, Ag, Pt.

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Ncert Solutions Chemistry Class 12th Class 12th

Which of the following compounds will show retention in configuration on nucleophile substitution by OH? ion?

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Raj Pandey

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Reaction path is SN2 because OH? is strong nucleophile, but hydroxyl ion will not attack on chiral centres and so there is retension of configuration.

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Ncert Solutions Chemistry Class 12th Class 12th

A spherical balloon of radius 3 cm containing helium gas has a pressure of 48 * 10?³ bar. At the same temperature, the pressure, of a spherical balloon of radius 12 cm containing the same amount of gas will be * 10? bar

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Vishal Baghel

Contributor-Level 10

P? V? =P? V? 48*10? ³*3³ = P? *12³. P? =750*10?

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Ncert Solutions Chemistry Class 12th Class 12th

In an estimation of bromine by Carius method, 1.6 g of an organic compound gave 1.88 g of AgBr. The mass percentage of bromine in the compound is [numerical value] (Atomic mass, Ag=108, Br=80 g mol?¹)

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