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Earn 100

The Lewis acid strength of BF3, BCl3 and BBr3 follows the order:

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Important Questions on The p-block Elements

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A metal X dissolves both in dilute HCl and dilute NaOH to liberate H2. Addition of NH4Cl and excess NH4OH to an HCl solution of X produces Y as a precipitate. Y is also produced by adding NH4Cl to the NaOH solution of X. The species X and Y, respectively, are:
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Amongst NH3, PH3, AsH3 and SbH3, the one with the highest boiling point is:
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Select the incorrect statement.
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Consider the following statements.

S1: The percentage of s-character in the orbital forming S-S bonds and P-P bonds in S8 and P4 molecules, respectively, are the same.

S2: In SF4, the bond angles, instead of being 90° and 180° are 89° and 177°, respectively, due to the repulsions between lone pair and bond pairs of electrons.

S3: Aqueous H3PO4 is syrupy (i.e., more viscous than water).

S4SiO2 crystal may be considered as a giant molecule in which, eight-membered rings are formed with alternate silicon and oxygen atoms.

Of these:

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Methyl chloride reacts with X at high temperature in the presence of a catalyst Y to give Me2SiCl2 as one of the products. The compound can also be formed by reaction of silicon tetrachloride with an organometallic reagent, ZX, Y, and Z respectively, are
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Which electrolyte is used in Dennis method for the preparation of fluorine?
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The numbers of lone pair(s) on Xe in XeF2 and XeF4 are, respectively:
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One mole of calcium phosphide on reaction with excess water gives