Welcome to your P & C of OC - 5
1.
Which halogen is not detected by AgNO3 test?
2.
Phosphorus test involves oxidation state change from
3.
False positive Beilstein test is given by
4.
Red colour in Middleton’s test confirms presence of
5.
Ammonium molybdate is added to confirm presence of
6.
Ammonium phosphomolybdate precipitate colour is
7.
White precipitate with AgNO3 indicates presence of
8.
Which ion interferes in halogen test if not removed?
9.
Which precipitate colour confirms iodine?
10.
Chlorine water is added in CCl4 test to
11.
Dark yellow precipitate insoluble in NH4OH confirms
12.
Green flame in Beilstein’s test may also be due to presence of
13.
Light yellow precipitate partially soluble in NH4OH confirms
14.
AgCl dissolves in NH4OH due to formation of
15.
CCl4 layer test is mainly used for detection of
16.
Bluish green flame in Beilstein’s test indicates
17.
Sodium thiocyanate reacts with FeCl3 to give
18.
Beilstein’s test fails for fluorine because
19.
Which test uses ammonium molybdate?
20.
Blackening of silver coin dipped in sodium extract indicates
21.
Violet colour in CCl4 layer confirms
22.
Which halogen gives maximum solubility in NH4OH?
23.
Which halide gives curdy precipitate?
24.
Reagent used in phosphorus detection after fusion is
25.
Yellow precipitate in phosphorus test is due to formation of
26.
Black precipitate with lead acetate indicates
27.
Sulphur present as sulphate gives
28.
Test for phosphorus involves conversion into
29.
In Lassaigne’s test, sulphur is detected using lead acetate due to formation of
30.
Silver coin test turning black indicates formation of
31.
Which test confirms halogen by flame colour?
32.
Orange colour in CCl4 layer indicates
33.
Which reagent removes Na2S before halogen test?
34.
Why sodium extract is neutralised before halogen test?
35.
AgI does not dissolve in NH4OH because
36.
Beilstein’s test confirms presence of
37.
CCl4 is preferred because it is
38.
Sodium peroxide is used in phosphorus test because it
39.
In halogen test, sodium extract is boiled with HNO3 to remove
40.
Violet colour with sodium nitroprusside indicates presence of
41.
Middleton’s test detects sulphur by formation of
42.
In halogen test, NaX reacts with AgNO3 to form
43.
Test for sulphur fails if compound contains
44.
Detection of sulphur, nitrogen, halogens comes under
45.
Which test is confirmatory for sulphur?
