You visited us 1 times! Enjoying our articles? Unlock Full Access!

Byju's Answer

Standard XII

Chemistry

Standard Electrode Potentials

The filtrate ...

Question

The filtrate of group II has been given to you for analysis of group III ( which may contain $F e^{2 +}, C r^{3 +} a n d A l^{3 +}$ ). mention systematic steps you would follow

Step I : Boil off $H_{2} S$
Step II : Add a drop of $H N O_{3}$ (to oxide $F e^{2 +}$ to $F e^{3 +}$ )
Step III:Add $N H_{4} C l$ boil, cool and add $N H_{4} O H$

Which of following is correct option?

Step I and Step II are wrong

No worries! We‘ve got your back. Try BYJU‘S free classes today!

Only Step II is wrong

No worries! We‘ve got your back. Try BYJU‘S free classes today!

Step I and Step III are wrong

No worries! We‘ve got your back. Try BYJU‘S free classes today!

All steps are correct

Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses

Open in App

Solution

The correct option is D All steps are correct
Step I: The filtrate of group II is boiled to remove hydrogen sulphide.
Step II: A drop of nitric acid is added which oxidizes ferrous ions (if present) to ferric ions.
Step III: Ammonium chloride is added and the solution is boiled, cooled and ammonium hydroxide is added.

Suggest Corrections

Similar questions

Q. A mixture contains

C u^{2 +}

A l^{3 +}

, and

N i^{2 +}

. Following steps have been adopted but written in disorder

I: Filter, boil off

H_{2} S

gas and add

N H_{4} C l

; heat and add

N H_{4} O H

II: Filter, add

N H_{4} O H

and pass

H_{2} S

gas.
III: pass

H_{2} S

gas into an acidified solution of the mixture.

Steps will be used in the following order :

F e C r_{2} O_{4}

(chromite) is converted to

C r

by following steps :
Chromite

I \to

N a C r O_{4}

I I - \to

C r_{2} O_{3}

I I I - - \to

C r

Reagents in I, II and III might be :
I- Step II-Step III-Step

Given below are the steps to test the presence of proteins in a food item.

(i) Take a small quantity of the food item in a test tube, add 10 drops of water to it and shake it.

(ii) Make a paste or powder of food to be tested.

(iii) Add 10 drops of caustic soda solution to the test tube and shake well.

(iv) Add 2 drops of copper sulphate solution to it.

Which of the following is the correct sequence of steps?

(a) i, ii, iv, iii

(b) ii, i, iv, iii

(d) iv, ii, i, iii

Q. Two drops of dilute sulphuric acid were added to 1 g of copper sulphate powder and then a small amount of hot water was added to dissolve it (step I). On cooling, beautiful blue coloured

crystals got separated (step II). Step I and step II are:

Q. Two drops of dilute sulphuric acid were added to

1 g

of copper sulphate powder and then a small amount of hot water was added to dissolve it (step

I

). On cooling, beautiful blue-coloured crystals got separated (step

I I

). Step

I

and step

I I

are

Join BYJU'S Learning Program