General introduction of Group 13 Element

IMPORTANT

General introduction of Group 13 Element: Overview

This Topic covers sub-topics such as p-Block Elements, Inert Pair Effect, General Configuration of p-Block Elements, Occurrence of Group 13 Elements and, Anomalous Behaviour of First Element of Each Group and its Reasons

Important Questions on General introduction of Group 13 Element

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chemistry>p- Block Elements>General introduction of Group 13 Element> Q 1

The correct statement(s) among the following is/are:

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chemistry>p- Block Elements>General introduction of Group 13 Element> Q 2

Identify a p-block element among the given elements.

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chemistry>p- Block Elements>General introduction of Group 13 Element> Q 3

The oxide, which is neither acidic nor basic is

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chemistry>p- Block Elements>General introduction of Group 13 Element> Q 4

Select CORRECT statement.

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chemistry>p- Block Elements>General introduction of Group 13 Element> Q 5

Non-metallic character _____ down the group.

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chemistry>p- Block Elements>General introduction of Group 13 Element> Q 6

The oxides of nonmetal which is neutral is

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chemistry>p- Block Elements>General introduction of Group 13 Element> Q 7

Which of the following is not an example of13-15 compound?

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chemistry>p- Block Elements>General introduction of Group 13 Element> Q 8

In aluminates, the co-ordination number of Al is:

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chemistry>p- Block Elements>General introduction of Group 13 Element> Q 9

The strongest oxidant among the following is:

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chemistry>p- Block Elements>General introduction of Group 13 Element> Q 10

 In contrast, thallium exists in +1 and +3 oxidation states. Aluminium is usually found in +3 oxidation state. This is due to:

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chemistry>p- Block Elements>General introduction of Group 13 Element> Q 11

Which of the following molecules form 2-electron 3-centred bonds?

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chemistry>p- Block Elements>General introduction of Group 13 Element> Q 12

Diborane reacts with O2 to given boric oxide and water vapour.
B2 H6 (g) + 3O2 (g) → B2 O3 (s) + 3H2 O(g)
Calculate the partial pressure of the gases if we mix B2 H6 and O2 in the correct stiochiometric ratio, and the total pressure of the mixture before the reaction is 200 mm Hg 

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chemistry>p- Block Elements>General introduction of Group 13 Element> Q 13

Incorrect statement about diborane is:

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chemistry>p- Block Elements>General introduction of Group 13 Element> Q 14

The following statements about diborane B2H6 are given below. Choose the correct statement(s).
I. Four B-H bonds are in the same plane.
II. Hybridisation of"B" is sp3.
III. It is a non-planar molecule. 

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chemistry>p- Block Elements>General introduction of Group 13 Element> Q 15

Two units lower in charge than expected from the group oxidation state, this tendency to form ions is called as:

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chemistry>p- Block Elements>General introduction of Group 13 Element> Q 16

What is the reason behind the following phenomenon?

Ge2+ compounds are powerful reductants, whereas Pb4+ compounds are strong oxidants.

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chemistry>p- Block Elements>General introduction of Group 13 Element> Q 17

For the following reaction 2X+B2H6⟶BH2X2+BH4- ; the amine (s) X can not be :
 

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chemistry>p- Block Elements>General introduction of Group 13 Element> Q 18

p-block elements have a general electronic configuration of ns2 np1-x. Here x is

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chemistry>p- Block Elements>General introduction of Group 13 Element> Q 19

The general electronic configuration for halogens are given by ns2npx. The value of x will be:

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chemistry>p- Block Elements>General introduction of Group 13 Element> Q 20

In following reactions how many boron products are produced?
$\mathrm{BF}_{3}+\mathrm{LiAlH}_{4} \stackrel{\text { ether }}{\longrightarrow} \mathrm{A}+\mathrm{B}+\mathrm{C}$
$\mathrm{BF}_{3}+\mathrm{NaH} \stackrel{450 \mathrm{K}}{\longrightarrow} \mathrm{D}+\mathrm{E}$
$\mathrm{Na}_{2} \mathrm{B}_{4} \mathrm{O}_{7}+7 \mathrm{H}_{2} \mathrm{O} \longrightarrow \mathrm{F}+\mathrm{G}$