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

Four students A, B, C and D noted the initial colour of the solutions in beaker I, II, III and IV. After inserting zinc rods in each solution and leaving it undisturbed for about two hours he noted the colour of each solution again.

They recorded their observations in the form of table given below :
Which student noted the colour change in all the four beakers correctly ?

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

answer is A.

(Unlock A.I Detailed Solution for FREE)

Best Courses for You

JEE

NEET

Foundation JEE

Foundation NEET

CBSE

Detailed Solution

Because displacement reaction takes place in beakers III and IV and no reaction in beakers III and IV.

$Beaker III: {Zn}_{(s)} + {FeSO}_{4 (aq)} \to {ZnSO}_{4 (aq)} + {Fe}_{(s)}$ ferrous sulphate is green colour it becomes colourless

${Beaker IV:}_{in} {Zn}_{(s)} + {CuSO}_{4 (aq)} \to {ZnSO}_{4 (aq)} + {Cu}_{(s)} .$ copper sulphate is blue colour it becomes colourless

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!