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