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QUIZ 7 sec 3

Total questions: 25

Worksheet time: 2hrs 5mins

Name
Class
Date
1.

Sulphuric acid is acting as ……….. agent when reaction with NaBr salt and as …….. agent when reacting with iron filings.

a)

Oxidizing – oxidizing

b)

Reducing – reducing

c)

Oxidizing – reducing

d)

Reducing – oxidizing

2.

To reduce smell of hydrogen chloride gas a rod wet ….. is used.

a)

Caustic soda

b)

Sodium sulphate

c)

ammonia solution

d)

Potassium chloride

3.

Scientific idea that used in detection for anions is used to detect some anions. Which anions detection depends on this scientific idea.

a)

Both carbonate & bicarbonate

b)

Both chloride & bromide

c)

Both sulphate & phosphate

d)

Both nitrite & nitrate

4.

Detecting acidic radical of simple salts is depending on acidic effect at …

a)

Salt solution

b)

Molten salt

c)

Molten pure salt

d)

Solid salt itself

5.

4. Which of the following is a precipitating agent?

a)

Sodium sulphate

b)

Ammonium hydroxide

c)

Ammonium chloride

d)

copper sulphate

6.

organic compound is being estimated qualtitively in the form of ……

a)

anions only

b)

cations only

c)

the whole compound

d)

acid radicals only

7.

Ozone gas reacts with potassium iodide solution forming three different products ….. Which of the produced substances turns a paper wetted with starch solution into blue?

a)

Oxygen

b)

iodine

c)

potassium hydroxide

d)

Hydrogen Iodide

8.

Dilute sulphuric acid reacts with each of barium hydroxide solution and barium chloride solution .. What is the similarity between these reactions?

a)

A gas evolves from both reactions

b)

A water insoluble salt is formed from both reactions

c)

the solution produced from both reactions has pH value equal 7

d)

Both reactions produce water

9.

one of the following anions by detecting it in a confirmatory test, color of the indicator is removed it is ……

a)

anions of iodide and phosphate

b)

anions of thiosulphate and sulphate

c)

anions of thiosulphate and nitrite

d)

anions of carbonate and iodide

10.

Magnesium sulphate solution distinguishes between …… anions

a)

Sulphide and chloride

b)

Carbonate and nitrite

c)

Chloride and bromide

d)

Carbonate and bicarbonate

11.

Aqueous solution of ………… dissolves precipitate of silver chloride

a)

HCl

b)

H2SO4

c)

HNO3

d)

NH3

12.

Precipitates of group ……………. is white.

a)

Anions of dil. HCl sol.

b)

Anions of concentrated H2SO4 sol

c)

Anions of barium chloride sol.

d)

All of the previous

13.

……………. Group is the group which contain he anions of the most stable acids.

a)

Anions of diluted hydrochloric acid

b)

Anions of barium chloride solution

c)

Anions of concentrated sulphuric acid

d)

Noble gases

14.

To differentiate between nitrite & nitrate salts, we use …

a)

Dil. HCl

b)

Hot Conc. H2SO4

c)

Acidified KMnO4 solution

d)

All answers are correct

15.

All of the following gases evolves during detect of acidic radicals, except …

a)

Carbon dioxide

b)

Sulphur dioxide

c)

Hydrogen

d)

Hydrogen sulphide

16.

Which of the following don’t give special gasses so it is been detected only in solutions?

a)

Nitrite solution

b)

Thiosulphate anion

c)

Phosphate anion

d)

Chloride anion

17.

……………….. gas is turning a paper wet by acidified orange potassium dichromate into green

a)

SO3

b)

CO2

c)

NO2

d)

SO2

18.

By passing CO2 gas that turbids the clear lime water for a long time ….. is formed.

a)

CaCO3

b)

Ca(HCO3)2

c)

Mg(HCO3)2

d)

H2S

19.

Clear lime water gets turbid when …… is formed

a)

Na2SO4

b)

MgCO3

c)

Ca(HCO3)2

d)

CaCO3

20.

The removal of violet odor of acidified potassium permanganate by adding .......... to it.

a)

strong oxidizing agent

b)

Ammonium solute

c)

reducing agent

d)

oxidizing agent

21.

……………. Can’t form ppt. unless presence of heat source

a)

adding ammonium hydroxide solution to iron III chloride

b)

adding ammonium carbonate solution to sodium bicarbonate

c)

adding hydrochloric acid to silver nitrate

d)

adding magnesium sulphate solution to sodium bicarbonate

22.

ppt. of …….. group have white color

a)

anions of dil. HCl group

b)

anions of conc. H2SO4

c)

anions of barium chloride

d)

all the previous

23.

……………. anion produces bad odor when we test it.

a)

Chloride

b)

Sulphide

c)

phosphate

d)

thiosulphate

24.

Anions of ........ can't be precipitated by barium cations

a)

phosphate

b)

sulphate

c)

phosphate, sulphate

d)

chloride and bromide

25.

By adding excess amount of concentrated sulphuric acid to a mixture of salts ( sodium bromide and sodium chloride) and putting a paper wet with starch solution on the edge of the tube, the paper will ….

a)

Turn into red

b)

Turn into blue

c)

Not changed

d)

be acquired by specific color