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Question 1

class 1A

Answer 1

co3 2-, hco3-, so3 2-, hso3-, s2o3 2-, s2-, no2-, ch3co2-

Question 2

NO2-(NO2)

Answer 2

brown fumes

Question 3

CO3 2-(CO2)

Answer 3

colorless, odourless, w brisk efferevescence

Question 4

SO3 2- (SO2)

Answer 4

colorless gas w burning smell of sulphur

Question 5

S2- (H2S)

Answer 5

rotten egg smelled gas

Question 6

Ch3coo-

Answer 6

vinegar smell

Question 7

S2O3 2-

Answer 7

white turbidity gradually turning into white ppt

Question 8

distinguish carbonate and bicarbonate

Answer 8

phenolpthalein
no color: HCO3-
pink color: CO3 2-

Question 9

all silver compounds except AGi and AG2S are soluble in nh3

Question 10

distinction btw carbonate n bicarbonate can be done using

Answer 10

CaCl2 SrCl2 BaCl2 AgNO3 Hg2(NO3)2

HgCl2 MgCl2 ZnCl2 CuCl2 cannot be used when both carbonate and bicarbona

Question 11

distinction btw sulphite n bisulphite

Answer 11

CaCl2 SrCl2 BaCl2 AgNO3 forms colored ppt w So3 2- but not w HSO3-

Question 12

for S2- + cadmium actetate

Answer 12

CdS yellow

Question 13

S2- + AgNO3/Pb(OAc)2

Answer 13

Ag2S/PbS black

Question 14

S2O3 2- + CaCl2

Answer 14

no ppt

Question 15

S2O3 2- + BaCl2

Answer 15

BaS2O3w

Question 16

S2O3 2- + KI3

Answer 16

colorless

Question 17

S2O3 2- + I2

Answer 17

colorless

Question 18

S2O3 2- + FeCl3

Answer 18

voilet tuns into green

Question 19

S2O3 2- + KCN

Answer 19

blood red

Question 20

HSO3- is neutral towards litmus while so3 2- is alkaline

Question 21

all the carbonates/sulphates are insoluble in h2o except for

Answer 21

ammonium and alkali carbonates/sulphates

Question 22

so2 passed thro k2cr2o7 turns ___ to ____

Answer 22

orange to green

Question 23

Mno4, h+, cr2o7, io3, starch, fecl3, br2 water, i2 water oxidizes

Answer 23

So2 but not co2

Question 24

s2o3 w cacl2 and bacl2

Answer 24

no ppt and white ppt

Question 25

s2o3 dissolves in ki3

Answer 25

colorless soln

Question 26

s2o3 + i2 starch

Answer 26

colorless

Question 27

s2o3+ fecl3

Answer 27

fe(s2o3)2 violet turns into green

Question 28

s2o3 + kcn followed by fecl3

Answer 28

red feSCN3

Question 29

all nitriles are water soluble except for

Answer 29

agno2

Question 30

NO2/ acetate ion + agno3
no2+ bacl2
no2+hcl
no2+ KI starch

Answer 30

white ppt agno2/AcOAg
no ppt
blue(hno2 and n2o3) and brown no2
deep blue

Question 31

brown ring formula

Answer 31

[fe(h2o)5no]2+

Question 32

no2 decolourizes kmno4
turns k2cr1o7 into

Answer 32

+7 to +2
green

Question 33

all the niNtrates are water soluble