Beta Question Bank for Engineering: Chemistry>Chapter 19 - The p-Block Elements>EXERCISE-2>Q 53

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${BCl}_{3}$ does not exist as dimer but ${BH}_{3}$ exists as dimer $(B_{2} H_{6})$ because:

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Important Questions on The p-Block Elements

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Beta Question Bank for Engineering: Chemistry>Chapter 19 - The p-Block Elements>EXERCISE-2>Q 55

Borax is used as a cleansing agent because on dissolving in water, it gives:

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Beta Question Bank for Engineering: Chemistry>Chapter 19 - The p-Block Elements>EXERCISE-2>Q 60

H_{3} B O_{3} \overset{T_{1}}{\to} X \overset{T_{2}}{\to} Y \overset{red hot}{\to} B_{2} O_{2}

if

T_{1} < T_{2}

then

X

and

Y

respectively are -

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Beta Question Bank for Engineering: Chemistry>Chapter 19 - The p-Block Elements>EXERCISE-2>Q 61

Borax is used as a buffer since:

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Beta Question Bank for Engineering: Chemistry>Chapter 19 - The p-Block Elements>EXERCISE-2>Q 62

HI

can be prepared by all the following methods except

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Beta Question Bank for Engineering: Chemistry>Chapter 19 - The p-Block Elements>EXERCISE-2>Q 65

Concentrated

{HNO}_{3}

reacts with

I_{2}

to give:

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Beta Question Bank for Engineering: Chemistry>Chapter 19 - The p-Block Elements>EXERCISE-2>Q 67

In a molecule of phosphorus

(V)

oxide, there are:

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Beta Question Bank for Engineering: Chemistry>Chapter 19 - The p-Block Elements>EXERCISE-3>Q 1

Chlorine gas can be produced by the reaction of

HCl

(aq) with

{MnO}_{2} (s) .

Only

{MnCl}_{2} (s)

and

H_{2} O (l)

are the by products. What volume of

{Cl}_{2} (g)

(in litre) of density

\frac{2.84 g}{L}

will be produced from the reaction of

400 mL

of

0.1 M HCl (aq)

with an excess of

{MnO}_{2} ?

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Beta Question Bank for Engineering: Chemistry>Chapter 19 - The p-Block Elements>EXERCISE-3>Q 19

Number of water molecules required for the complete hydrolysis of one molecule of :