11th Class Chemistry Chapter 16 MCQ Test with Answer

Question # 1

The chromyl chlorikle test is a specific confirmatory tst for

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

Question # 2

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 # 3

The brown ring tests a confirmatory test for which acid radical

Nitrate A
Chloride B
Sulfate C
Carbonate D

Question # 4

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 # 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

Which of the followig is not a component of titration

Pipette A
Burette B
Test Tube C
Conicla flask D

Question # 7

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

Pipette A
Burette B
Beaker C
Measuring cylinder D

Question # 8

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 # 9

The end point of a titration is indicated by

Formation of a gas A
Change in temperatutere B
Colour change of the indicator C
Change in pressure D

Question # 10

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 # 11

Lab coats are important becausse they.

Are fashionable A
Prevent contamination and protect clothing B
Make you feel like a scientist C
Keep you warm D

Question # 12

Which of the followign is a primary standard solution.

NaOH A
Na2CO3 B
KOH C
HCl D

Question # 13

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 # 14

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 # 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

Which cation gives a white gelatinous precipitate upon the addition of aueoeous ammonia.

Cr3+ A
Cr2+ B
Zn2+ C
Al3+ D

Question # 17

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

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

Sr.#	Question	Answer
1	Which of the followign pairs would require methly orinage as a a indicator	A. Strong acid and strong base B. Weak acid and sgtrong base C. Strong acid and weak base D. Weak acia and weak base
2	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+
3	Before starting a titration , the burette should be	A. Headed B. Drived completely C. Washed with distiled water only D. Rinsed with the solutin it will contain
4	Which apparatus is used ot deliver a variiable volume of soluton in titration .	A. Pipette B. Burette C. Beaker D. Measuring cylinder
5	Which of the following is the most suitable indicator for the titration of a strong acid and a storng base.	A. Phenolphthalein B. Methyl orrange C. Universal indicator D. Litmus
6	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
7	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
8	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
9	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
10	A gas with a pungent smell turns moist red litmus paperblue. The gas is likely	A. NH3 B. HCl C. CO2 D. SO2

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