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Inorganic Chemistry > P Block 3 > Flashcards

P Block 3 Flashcards

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1
Q

Electronegativity tricks of P block Elements

A

draw Bhalla in the first two groups of the P blocks and then a little variation with the Bhalla being pressed downwards and then the last two will be pointed downwards like a sword

that would be the variations of elements

from the 3rd line
there would be 
less
more
more

meaning the element will be Less/more compared to the diagonal in the upward period

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2
Q

trick for memorizing the names of oxyacids of phosphorous

A

draw the table and then match the things thats asked

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3
Q

metaphosphoric acid structure

A
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4
Q

Zeolites in which form and what does it do to hard water

A

hydrated zeolites are used as ion exchangers in softening of hard water

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5
Q

The basic structural unit of silicates is

A

SiO4 4-

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6
Q

Except for what element in grp 15 all the others show allotropy

A

N

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7
Q

What P and As compounds act as ligands and what kind of bond does it forms?!

A

dπ-dπ

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8
Q

Hydrides of grp 15 thermal stability, bond dissociation, basicity, reducing character, bond angle order

A
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9
Q

What oxides in grp 15 are amphoteric

A

arsenic and antimony

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10
Q

Which halide is covalent? pentalhalide or trihalide and why

A

pentahalide is more covalent because it has the O.S of the elements as 5 where as trihalides have O.S 3

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11
Q

PCl5 exists in the solid-state as

and why is it different than compared to PBr5

A

because Br is heavier and bigger and it would be difficult to accommodate Br around P as compared to Cl around P

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12
Q

Which only nitrogen halide is known stable

A

NF3

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13
Q

Very pure dinitrogen is obtained by

A
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14
Q

Dinitrogen is reactive/inert at room temperature and why?!

A

dinitrogen is inert at room temperature because of high enthalpy of the triple bond of N-N

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15
Q

N2 and O2 combines to form ___ at what condition

A

N2 and O2 combines to form NO at very high temperature*(2000K)

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16
Q

Urea formula

A

NH2CONH2

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17
Q

How forming ammonia with Urea

A
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18
Q

Catalyst used in habers process

A

K2O and Al2O3

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19
Q

What is used as an refrigent

A

liquid ammonia

20
Q

Why does NH3 act as a lewis base

A

nitrogen atom in NH3 has one lone pair of electron which is available for donation

21
Q

Cu2+ with Ammonia forms which complex and whats the color?

A

deep blue since Cu2+ has blue color

22
Q

Nitrogen Oxides table

A
23
Q

Nitrogen oxides structure

A
24
Q

What kind of bonds does N2O5 has

A

covalent and coordinate covalent bonds

25
Q

NH3 can be dried by?

A

by passing over fresh quicklime(CaO) or soda lime(NaOH & CaO)

26
Q

Ammonia with sodium hypochlorite?

A
27
Q

NaNO3 with H2SO4

A
28
Q

Boiling point of the grp 15 hydrides

A
29
Q

different type of oxides of grp15 thermal stability with acidity

A
30
Q

PBr5 exis in the solid stae as

A

[PBr4]^+

Br^-

31
Q

BiF3 is predominantly ionic or covalent?

A

inoic

32
Q

NH4Cl + Ca(OH)2 forms

A
33
Q

ammonoium sulfate with sodium hydroxide forms

A
34
Q

why does NO2 dimerises

A

NO2 has an odd number of electrons and by dimerisation it is converted to a stable N2O4 molecule with even electrons

35
Q

brown ring test compound and the O.S of Fe, NO

A

O.S. of Fe:- +1

O.S. of NO:- +1

36
Q

whats a component of lead storage batteries and is also a amphoteric and strongly oxidizing agent

A

PbO2

37
Q

why does SiCl6 ^2- doesn’t exists?

A

steric crowding around the atom

38
Q

treated with CO2 forms

A
39
Q

crystalline forms of silica name

A

quartz, tridymite and cristobalite

40
Q

amorphous form of silica eg

A

kieselguhr

41
Q

BH3is electron-deficient or electron sufficient compound and how does it behave(lewis acid or base)

A

its electron deficient and is a lewis acid

42
Q

why is the carbon atoms’ lateral overlapping of 2pand 2p most effective

A

because it has a small size

43
Q

eg of a 3-dimensional silicate?

A

feldspars

44
Q

trialkylchlorosilane on hydrolysis gives?

A
45
Q

CaF2 with SiO2+H2SO4 forms?

A

Inorganic Chemistry (19 decks)

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