AI Mentor

Check Your IQ

Free Expert Demo

Try Test

Courses

Dropper NEET Course Dropper JEE Course Class - 12 NEET Course Class - 12 JEE Course Class - 11 NEET Course Class - 11 JEE Course Class - 10 Foundation NEET Course Class - 10 Foundation JEE Course Class - 10 CBSE Course Class - 9 Foundation NEET Course Class - 9 Foundation JEE Course Class -9 CBSE Course Class - 8 CBSE Course Class - 7 CBSE Course Class - 6 CBSE Course

Offline Centres

How many of the following statements are correct?

see full answer

Your Exam Success, Personally Taken Care Of

1:1 expert mentors customize learning to your strength and weaknesses – so you score higher in school , IIT JEE and NEET entrance exams.

An Intiative by Sri Chaitanya

A dirty green ppt forms when ferrous sulphate reacts with an excess of NaOH

Hydration energy of ${Cu}^{+}$ is more than ${Cu}^{2 +}$

The process of purification of nickel is:

${Ni}_{(impure)} + 4 CO \overset{450 - 470 K}{⟶} Ni (CO)_{4} \overset{330 - 350 K}{⟶} {Ni}_{(pure)} + 4 CO$

Green solution forms when cooper sulphate reacts with Iron.

answer is A, C, D.

(Unlock A.I Detailed Solution for FREE)

Best Courses for You

JEE

NEET

Foundation JEE

Foundation NEET

CBSE

Detailed Solution

Dirty green ppt of Fe(OH)₂ forms when FeSO₄ reacts with an excess of NaOH.

${FeSO}_{4} + 2 NaOH \to \underset{Dirty green ppt}{Fe {(OH)}_{2} ↓} + {Na}_{2} {SO}_{4}$

Impure nickel first treated with a poisonous gas, CO and forms a volatile compound, Ni(CO)₄. This compound further heated to obtain pure nickel.

$Fe + \underset{Blue color}{{CuSO}_{4}} \to \underset{Green color}{{FeSO}_{4}} + Cu$

Watch 3-min video & get full concept clarity

courses

No courses found

Result Producing online coaching for JEE/NEET of south India

Largest All India Test Series for JEE/NEET

Best Online Course for IIT JEE

Best Online Course for NEET

Best Online Course for CBSE

Ready to Test Your Skills?

Check your Performance Today with our Free Mock Test used by Toppers!

Take Free Test

Get Expert Academic Guidance – Connect with a Counselor Today!