P block 7 Flashcards

1
Q

H4B2O6 + H2O

A

B is in +4 state! when it is in more than the needed OS, there is a peroxide linkage! and when there is a peroxide linkage, H2O2 is formedthereforeH3BO3 + H2O2

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2
Q

the only boron halidw which doesnt forms HX on hydrolysis

A

BF3 doesnt foroms HF ! instead it forms HBF4 + H3BO3

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3
Q

CO2 in water forms

A

H2CO3

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4
Q

SiO2 (amorphous) in water

A

Si(OH)4 ——-> H2SiO3

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5
Q

NF3 with water gets no reaction! why?

A

cuz no empty orbitals for H2O

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6
Q

N2O4 in water

A

disproportionate reaction

HNO2 + HNO3

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7
Q

PCl3 in water

A

H3PO3

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8
Q

HOCl with Water

A

OCl^-1

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9
Q

PCl5 with water

A

H3PO4

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10
Q

P4O7 with Water

A

H3PO4 + H3PO4

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11
Q

P4O8 with water

A

H3PO4 + H3PO4

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12
Q

P4O9 with Water

A

H3PO3 + H3PO4

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13
Q

SO2 + H2O

A

H2SO3

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14
Q

SO3 + H2O

A

H2SO4

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15
Q

SOCl2 + H2O

A

H2SO4 + HCl

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16
Q

SF6 doesnt reacts with water! why?

A

no space for water to enter! too much steric hinderence! there fore hydrolysis of high Atm number elements hydrides is simpler

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17
Q

H2S2O5 + H2O

A

H2S2O3

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18
Q

H2S2O6 + H2O

A

H2SO4

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19
Q

H2S2O7 + H2O

A

H2SO4

20
Q

H2SO4 + H2O2

A

H2S2O8

21
Q

SiF4 + H2O

A

HSiF4

22
Q

SbCl3 + H2O

A

SbOCl

23
Q

BiCl3 + H2O

A

BiOCl

24
Q

treated with CO2 forms

A
25
Q

CaF2 with SiO2+H2SO4 forms?

A
26
Q

SiF4 hydrolysis forms?

A
27
Q

sulfides soluble in nitric acid and sulfides which are not are?

A
28
Q

sulfides soluble in nitric acid and sulfides which are not are?

A
29
Q

PCl5 with water and excess of water forms?

A
30
Q

what is more reactive? F2 or ClF

A

F2

31
Q

what does ClF on hydrolysis forms?

A

on hydrolysis ClF Forms HOCl And HF

32
Q

electrolysis of concentrated solution of acidified sulphate solution yields?

A

H2S2O8

33
Q

which grp 15 hydride is the strongest reducing agent?

A

BiH3

34
Q

HNO3 with P4O10 forms?

A
35
Q

H2PO2^-1 with Ag+ forms

A
36
Q

what to keep in mind if we are asked number of lone pairs on a compound

A

keep in mind the lp of the constituents too

like XeF6 has 19 lp

37
Q

PCL3 with H3PO3 forms?

A

H4P2O5

38
Q

P4 with H2O in basic medium forms?

A
39
Q

SO2 with dil H2SO4 forms

A

SO3

40
Q

SO3 with K2Cr2O7 forms

A
41
Q

which sulphur is diamagnetic? and which is paramagnetic?

A

alpha,beta sulfurs are diamagnetic and S2 sulphur are paramagnetic

42
Q

NO with N2O4 forms

A
43
Q

what is used in cryosurgery?

A

N2

44
Q

what can be used as an inert diluent for reactive chemicals?

A

N2

45
Q

NH3 with Cl2(excess) forms

A