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Which of the following reaction is shown by alkynes?
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The octane number of Iso-octane is
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Isomerization of glucose produces
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Select the acid(s) which cannot be prepared by Grignard reagent.
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Carboxylic acids are more acidic than phenol and alcohol because of
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A compound does not react with 2, 4 dinitrophenylhydrazine, the compound is:
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The reagent used for dehydration of an alcohol is
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Geometrical isomerism is not shown by
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Dimerisation of carboxylic acids is due to
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The hydrogen bond is shortest in
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The crystal system of a compound with unit cell dimensions a = 0.387, b = 0.387 and c = 0.504 nm and α = β = 90° and ϒ = 120° is
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Total no. of voids in 0.5 mole of a compound forming hexagonal closed packed structure are:-
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The packing efficiency of the two dimensional square unit cell shown below is:

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A compound forms hexagonal close-packed structure. What is the total number of voids in 0.5 mol of it? How many of these are tetrahedral voids?
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Co-ordination number of sodium ion Na+ in Nacl is:-
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Which of the following is frenkal effect.
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Calculate half-life period of life order reaction whose rate constant is 200 sec–1
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In physical adsorption, gas molecules are bound on the solid surface by
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A plot of 10 g (x/m) versus 10 g p for the adsorption of a gas on the surface of a solid gives a straight line with slope equal to:-
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Rate of physisorption increase with:-
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