Group 1 cations : why we add ( slight excess ) from HCL ?

to make complete perceptation to cations

to direct the reaction to form AgCl

Why we add KNO3 to the ppt ( Group 2 cations ) ?

Prevent occurrence colloidal solution

what happened if the amount of HCL in Group 2 cations is less than 0.2 M ?

it will perceptate the cations of Group 4

it will perceptate the cations of Group 3

it will perceptate the cations of Group 5

Practical Analytical Chemistry Quiz ( Cations )

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| By Momenabdelmoniem

Momenabdelmoniem

Community Contributor

Quizzes Created: 3 | Total Attempts: 704

Questions: 10 | Attempts: 374 | Updated: Mar 15, 2023

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Questions and Answers

1.

Group 1 cations : we add (????) dil HCL
- A.
  
  Excess
- B.
  
  Slight excess
- C.
  
  Large excess
Correct Answer
B. Slight excess

Explanation
The correct answer : slight excess

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2.

Group 1 cations : why we add ( slight excess ) from HCL ?
- A.
  
  To make complete perceptation to cations
- B.
  
  To direct the reaction to form AgCl
- C.
  
  To reduce solubility of AgcL
- D.
  
  All answers above are right
Correct Answer
D. All answers above are right

Explanation
the correct answer is : All answers above are right

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3.

PbCrO4 ppt is yellow
- A.
  
  True
- B.
  
  False
Correct Answer
A. True

Explanation
the correct answer is : True

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1
0
4.

Sb2S3 ppt coulor is ?
- A.
  
  Yellow
- B.
  
  Red
- C.
  
  Black
- D.
  
  Option4
Correct Answer
B. Red

Explanation
Red is the correct answer

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5.

Why we add KNO3 to the ppt ( Group 2 cations ) ?
- A.
  
  To form colloidal solution
- B.
  
  Prevent occurrence colloidal solution
Correct Answer
B. Prevent occurrence colloidal solution

Explanation
Prevent occurrence colloidal solution

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6.

PbCL2 is solouble in cold water
- A.
  
  True
- B.
  
  False
Correct Answer
B. False

Explanation
hot water not cold

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7.

Group 2 cations : the amount of Hcl should be ?
- A.
  
  From 0.2 to 0.3 M
- B.
  
  More Than 0.3 M
- C.
  
  Less than 0.2 M
Correct Answer
A. From 0.2 to 0.3 M

Explanation
the correct answer is : from 0.2 to 0.3 M

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8.

What happened if the amount of HCL in Group 2 cations is less than 0.2 M ?
- A.
  
  It will perceptate the cations of Group 3
- B.
  
  It will perceptate the cations of Group 4
- C.
  
  It will perceptate the cations of Group 5
Correct Answer
B. It will perceptate the cations of Group 4

Explanation
it will perceptate the cations of Group 4 is the correct answer

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9.

CO+2 is a member of Group ??
- A.
  
  3
- B.
  
  4
- C.
  
  5
Correct Answer
B. 4

Explanation
4

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10.

1 ml solution of ( Ni+2 ) + ( DMG ) Give ??
- A.
  
  Blood Red colour
- B.
  
  Pale yellow colour
- C.
  
  Rose Red colour
- D.
  
  Option 4
Correct Answer
C. Rose Red colour

Explanation
Rose red colour

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Current Version
Mar 15, 2023

Quiz Edited by
ProProfs Editorial Team
Nov 25, 2017

Quiz Created by
Momenabdelmoniem

Practical Analytical Chemistry Quiz ( Cations )

Group 1 cations : we add (????) dil HCL

Group 1 cations : why we add ( slight excess ) from HCL ?

PbCrO4 ppt is yellow

Sb2S3 ppt coulor is ?

Why we add KNO3 to the ppt ( Group 2 cations ) ?

PbCL2 is solouble in cold water

Group 2 cations : the amount of Hcl should be ?

What happened if the amount of HCL in Group 2 cations is less than 0.2 M ?

CO+2 is a member of Group ??

1 ml solution of ( Ni+2 ) + ( DMG ) Give ??