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PH-PHR 327L Quiz No. 3 SS 2022-2023

Total questions: 15

Worksheet time: 5mins

Name
Class
Date
1.

Its sulfide salt dissolves in concentrated HCl.

a)

Mercury

b)

Tin

c)

Antimony

d)

Cobalt

e)

Iron

2.

Gives dark colored precipitates with tannic acid.

a)

Cobalt

b)

Iron

c)

Tin

d)

Mercury

e)

Antimony

3.

Gives blue precipitate in addition of ammonium hydroxide. Turns to cyan upon addition of excess reagent.

a)

Cobalt

b)

Iron

c)

Mercury

d)

Tin

e)

Antimony

4.

Gives an orange red precipitate when sodium or hydrogen sulfide is added.

a)

Cobalt

b)

Antimony

c)

Mercury

d)

Iron

e)

Tin

5.

Gives a brown gelatinous precipitate with ammonia or alkali hydroxides.

a)

Tin

b)

Mercury

c)

Cobalt

d)

Antimony

e)

Iron

6.

Gives a blood red colored solution in addition of ammonium thiocyanate.

a)

Iron

b)

Cobalt

c)

Mercury

d)

Tin

e)

Antimony

7.

Gives a purple precipitate upon addition of sodium carbonate TS.

a)

Cobalt

b)

Iron

c)

Antimony

d)

Mercury

e)

Arsenic

8.

Gives a yellow precipitate in addition of sodium hydroxide TS.

a)

Mercury

b)

Antimony

c)

Arsenic

d)

Tin

e)

Cobalt

9.

Gives intense blue precipitate in addition of potassium ferricyanide.

a)

Cobalt

b)

Iron

c)

Mercury

d)

Antimony

e)

Tin

10.

True or False: In formation of tin (II) hydroxide, it is insoluble of the excess reagent (sodium hydroxide).

a)

True

b)

False

11.

True or False: Mercury (II) sulfide is soluble in boiling nitric acid.

a)

True

b)

False

12.

True or False: Scheele's green is also known as cupric hydrogen arsenate.

a)

True

b)

False

13.

True or False: Copper aceto-arsenate is also known as Parrot Green.

a)

True

b)

False

14.

True or False: A dark red brown precipitate is yielded when potassium ferrocyanide is added in cobaltous chloride solution.

a)

True

b)

False

15.

True or False: Formation of a white precipitate of tin (II) hydroxide using ammonia TS will not dissolve the precipitate using the excess of the reagent used.

a)

True

b)

False