11th Class Chemistry Chapter 16 MCQ Test with Answer

Question # 1

The brown ring tests a confirmatory test for which acid radical

Nitrate A
Chloride B
Sulfate C
Carbonate D

Question # 2

While takig able a reading with a burette, why it is always advisibel to read the lower meniscus for the colorless liquids and the upper meniscus for the coloured liquids.

Because it is more convenient A
Becuse colorless liquids have more surface tension than colored liquids B
Because of the parallax effect C
Beacuse lower menisucs does not exist for colored liquids D

Question # 3

What is the the typical volume of solution a pipette delivers in titration

25 ml A
10 ml B
50 ml C
100 ml D

Question # 4

Which cation forms a white precipitate with NaOH that dissolves in excess NaOH

Mg2+ A
Zn2+ B
Ca2+ C
Ba2+ D

Question # 5

Which of the following is the most suitable indicator for the titration of a strong acid and a storng base.

Phenolphthalein A
Methyl orrange B
Universal indicator C
Litmus D

Question # 6

Why is it important to usea piptte in titration

To hold the acid A
To measure a fixed volume of the solution accurately B
To detect the endpoint C
To mix the acid and alkali D

Question # 7

addition of NH4OH to an aqueous solution of cation gives a green precipitate which turns brown upon standing, Which basic radical is indicated.

Cr3+ A
Cu2+ B
Fe2+ C
Fe3+ D

Question # 8

Before starting a titration , the burette should be

Headed A
Drived completely B
Washed with distiled water only C
Rinsed with the solutin it will contain D

Question # 9

Which of the followign pairs would require methly orinage as a a indicator

Strong acid and strong base A
Weak acid and sgtrong base B
Strong acid and weak base C
Weak acia and weak base D

Question # 10

The chromyl chlorikle test is a specific confirmatory tst for

Chloride ions A
Bromide ion B
Iodide ions C
sulfate ions D

Question # 11

A white precipitate that dissolves in excess ammonia is likely to be

Zinc hydroxide A
Calcium cabonate B
Lead Iodide C
Barium sulphate D

Question # 12

Which is the proper way to smell a chemical

Inhale deeply A
Waft she vapour toward your nose B
Suniff directly C
Open the bottle under our nose D

Question # 13

Why phenolphtahalein indicator is more apropriate to se durng the titrations which inole a strong acid and a strong base.

Because it is iteslf weakly cidic A
Because the pH at ath equivalence point as well as the pH over where the colour of phenolphthalein changes match each oterh B
Becauwe teh solution at the end of titrationis acidic C
Beacuse the solutin at the end of titratic is basic D

Question # 14

On dry heating test for salt analyshat turens limewater milky suggests the presence of.s, the evolution of coloriess, odouriess gas ta

Carbonate ion A
Chloridei on B
Sulfate ion C
Nitrate ion D

Question # 15

Eating an drinking in the lab is

Allowed during breaks A
Allowed if you'r creful B
Strictly proibiteed C
Allowed int he chemistry lab but not physics D

Question # 16

The addition of HCl to a carbonate salt leads to.

Effervescene=ce A
Blue colour formation B
White precipitate C
No visible reaction D

Question # 17

Which apparatus is used ot deliver a variiable volume of soluton in titration .

Pipette A
Burette B
Beaker C
Measuring cylinder D

Sr.#	Question	Answer
1	The end point of a titration is indicated by	A. Formation of a gas B. Change in temperatutere C. Colour change of the indicator D. Change in pressure
2	Why phenolphtahalein indicator is more apropriate to se durng the titrations which inole a strong acid and a strong base.	A. Because it is iteslf weakly cidic B. Because the pH at ath equivalence point as well as the pH over where the colour of phenolphthalein changes match each oterh C. Becauwe teh solution at the end of titrationis acidic D. Beacuse the solutin at the end of titratic is basic
3	Which is the proper way to smell a chemical	A. Inhale deeply B. Waft she vapour toward your nose C. Suniff directly D. Open the bottle under our nose
4	Why is it important to usea piptte in titration	A. To hold the acid B. To measure a fixed volume of the solution accurately C. To detect the endpoint D. To mix the acid and alkali
5	On dry heating test for salt analyshat turens limewater milky suggests the presence of.s, the evolution of coloriess, odouriess gas ta	A. Carbonate ion B. Chloridei on C. Sulfate ion D. Nitrate ion
6	Lab coats are important becausse they.	A. Are fashionable B. Prevent contamination and protect clothing C. Make you feel like a scientist D. Keep you warm
7	Eating an drinking in the lab is	A. Allowed during breaks B. Allowed if you'r creful C. Strictly proibiteed D. Allowed int he chemistry lab but not physics
8	addition of NH4OH to an aqueous solution of cation gives a green precipitate which turns brown upon standing, Which basic radical is indicated.	A. Cr3+ B. Cu2+ C. Fe2+ D. Fe3+
9	A gas with a pungent smell turns moist red litmus paperblue. The gas is likely	A. NH3 B. HCl C. CO2 D. SO2
10	Which of the followign is a primary standard solution.	A. NaOH B. Na2CO3 C. KOH D. HCl

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