PRELIM

Question 1

Forms yellow precipitate with sodium hydroxide?

Answer 1

Mercuric

Question 2

Lilac to purple red appearance with sodium when viewed through glass is a positive result of?

Answer 2

Potassium, Rubidium, Cesium

Question 3

Red film deposit can be found as a reaction of what ion?

Answer 3

Cupric

Question 4

What ion produces black ppt?

Answer 4

Mercury

Question 5

Flame test: Cesium

Answer 5

Lilac - Purple-red and Azure

Question 6

Forms white ppt with NaOH and NaHCO and is soluble with NHCl?

Answer 6

Litihium

Question 7

All of the following produce Yellow-green flame, except?

Barium
Manganese
Molybdenum
All of the above
None of the above

Answer 7

None of the above

Question 8

What compound acidified NaCl in oxalate test for Calcium?

Answer 8

Acetic Acid

Question 9

Which of the following elements imparts a characteristics of violet color to non-luminous flame?

Sodium
Potassium
Ferric
Copper

Answer 9

Potassium

Question 10

All of the following are insoluble potassium compounds, except?

K2PtCl6
KClO4
KNaCO(NO)226
All of the above
None of the above

Answer 10

None of the above

Question 11

Identification test for copper producing a reddish-brown insoluble precipitate is a product of?

Hydrochloric acid
Ammonia
Ferricyanide
Ferrocyanide

Answer 11

Ferrocyanide

Question 12

Flame test: Bright-green

Answer 12

Boron

Question 13

Salts that produces blue-green flame?

Answer 13

Phosphates

Question 14

The following are not considered as reducing agents in silver mirror tests, except?

Formaldehyde
Acetate
Methanol
All of the above
None of the above

Answer 14

Formaldehyde

Question 15

Flame test: Light blue

Answer 15

Arsenic

Question 16

The color of the flame produced by lithium?

Answer 16

crimson red

Question 17

The ion that gives a white precipitate with HCl which is soluble in excess ammonium hydroxide butreprecipitated upon addition of nitric acid:

silver
mercurous
plumbous
cupric

Answer 17

silver

Question 18

Product of Ammonium chloride and Sodium hydroxide upon decomposition?

Ammonia
Chlorine
Oxygen
Carbon dioxide

Answer 18

Ammonia

Question 19

Copper imparts a characteristic _________ color to a nonluminous flame:

emerald green
blue
scarlet
golden yellow
,

Answer 19

emerald green

Question 20

Color reaction for Strontium when subjected to flame with or without barium masking?

Brilliant red
Crimson
Scarlet
None of the above
All of the above

Answer 20

All of the above

Question 21

Flame test: Lithium

Answer 21

Carmine to Magenta

Question 22

Flame test: Intense yellow

Answer 22

Sodium; Sodium compounds

Question 23

Element with faint-green flame?

Answer 23

Antimony

Question 24

Positive reaction for KCl combined with Sodium bitartrate

White crytalline insoluble ppt
White crystalline soluble ppt.
No reaction
Black curdling ppt

Answer 24

White crystalline soluble ppt.

Question 25

Flame test: Red unfiltered flame?

Answer 25

Rubidium

Question 26

Barium sulfate is ______________ with nitric acid

Answer 26

Insoluble

Question 27

Compound producing azure flame? Lead Selenium Copper chloride All of the above None of the above

Answer 27

All of the above

Question 28

Flame test: Zinc

Answer 28

White-green

Question 29

Transient yellowish-red color in non luminous flame is a reaction by one of the following, except? Calcium chloride Hydrochloric acid Ethanol All of the above None of the above

Answer 29

Ethanol

Question 30

What is the indication that the solution is acidic?

Answer 30

Blue litmus paper turns red