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If the ratio of rates of diffusion of two gases is 4:3, then ratio of their molecular weights would be

Asked by Ayan Arif 12/07/2016 Last Modified 12/06/2019

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In a metallic bond, why positive ions are called kernels, not cations?

The kernel is an atom without its valence electrons that are weakly bonded; no electron belongs to one nucleus, valence electrons can move one kernel to another. So it is known as kernel, not cation (have valency).

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Is coaching important for the class 12 science exam?

No need. The thing is you must have basics and be upto date in reading and learning. Just need a compressuve reading of lessons as many times as possible and practice bits questions. It is enough to get good result.

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The radius of Na⁺ cation is less than that of Na atom. Give reason.

No. Of shell of Na+ ion is less than the no. Of shell Na atom

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Calculate the 1000 atoms of nitrogen

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How would you explain the lower atomic radius of Ga as compared to Al?

Ga is present in 3rd period after the d-block in the periodic table, In this due to poor shielding effect of d electron effective nuclear charge increases that pull outershell electron more strongly hence has smaller size.

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