JEE Main Test 57

Result

JEE Main Test 57

Score
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Rank
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TIME Taken - -

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Weekly Quiz Competition

Question 1
4 / -1

Which of the following will have the highest coagulating power for a ferric hydroxide solution?

B
NaCl

C
BaCl₂

D
K₂CrO₄

E
K₄[Fe(CN)₆]

Solution

Ferric hydroxide is a positive sol. Hence, coagulation will depend upon coagulating power of an anion, which is directly proportional to the valency of an anion (Hardy Schulze rule). Out of the given options, [Fe(CN)₆]^4-has high charge with high coagulating power.
Question 2
4 / -1

On hydrolysis, (Me)₂SiCI₂ will produce

A
(Me)₂Si(OH)₂

B
(Me)₂Si = O

C
[-O-(Me)₂Si-O-]_n

D
Me₂SiCI(OH)

Solution

Dimethyl dichlorosilane will undergo hydrolysis to form siloxane polymers. Due to very large size difference between Si atom and oxygen atom, it fails to form a π-bond and so, the product of hydroglysis of Me₂SiCI₂ is polymeric i.e. [-O-Me₂Si-O-]n.