CameraIcon

SearchIcon

MyQuestionIcon

1

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

Colloidal Solutions

Which colloid...

Question

Which colloidal sol is most easily precipitated by Al³⁺ions?

A

T i O_{2} sol

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

B

A s_{2} S_{3} sol

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

C

A l_{2} O_{3} . x H_{2} O sol

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

D

Haemoglobin

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

Open in App

Solution

The correct option is B $A s_{2} S_{3} sol$
$A s_{2} S_{3}$ sol is negatively charged sol hence precipitated most easily by $A l^{3 +}$ ion. $T i O_{2}$ sol, $A l_{2} O_{3} . x H_{2} O$ sol and haemoglobin are positively charged sol and are precipitated by negatively charged ions.

Suggest Corrections

thumbs-up

0

Similar questions

A fresh precipitate can be transformed into colloidal sol by:

Q. When a small quantity of

F e C l_{3}

solution is added to the fresh precipitate of

F e (O H)_{3}

, a colloidal sol is obtained. The process through which this sol is formed is known as:

Q. Assertion :Alum is used to stop blood from a cut. Reason: Blood is negative sol and sol particles are coagulated more efficiently by

A l^{3 +}

Q. CdS sol is most easily coagulated by which ion?

CdS सॉल किस आयन द्वारा सर्वाधिक आसानी से स्कंदित हो जाता है?

Q. Lyophilic colloidal sols are much more stable than lyophobic colloidal sols. This is due to the extensive solvation of lyophilic colloidal sols, which form a protective layer outside it which prevents it from forming associated colloids. Lyophilic colloidal sols also protect lyophobic colloidal sols from precipitation by the action of electrolytes. This is due to the formation of a protective layer by the lyophilic sols outside lyophobic sols. Lyophilic sols are also called protective sols.
Gelatin (lyophilic) protects gold sol (lyophobic) from coagulation on the addition of a solution of sodium chloride. The protective powers of different colloidal sols are measured in terms of gold number.
Gold number is defined as the amount of protective sol in milligrams that prevents the coagulation of 10 mL of a given gold sol on adding 1 mL of a

10 %

solution of sodium chloride. Thus, the smaller the gold number of a lyophilic sol, the greater is the protective power.

[A g I] I^{-}

colloidal sol can be coagulated by the addition of a suitable cation. 1 mol

[A g I] I^{-}

A g N O_{3}, P b (N O_{3})_{2}

F e (N O_{3})_{3}

View More

Join BYJU'S Learning Program

similar_icon

Related Videos

lock

Colloids

CHEMISTRY

Watch in App

explore_more_icon

Explore more

Colloidal Solutions

Standard IX Chemistry

Join BYJU'S Learning Program

CrossIcon