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CBSE Class 12 Free Doubts and Solutions

CBSE - XII Science - Chemistry

I know that answer is (a) but please explain the reason in detail

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Asked by govtsecschoolnayaganv051 16th June 2019, 10:55 PM
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CBSE - XII Science - Physics

Can u please integrate this with the procedure. Limits 0 to q

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Asked by prakriti12oct 16th June 2019, 3:51 PM
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CBSE - XII Science - Biology

Give an account on double helix model for structures DNA 

Asked by lobilopatz 16th June 2019, 8:54 AM
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CBSE - XII Science - Chemistry

What will be the product according to haloform reaction of methyl ketones ? Will both the C=O groups be oxidised? Are all C=O groups oxidised with the addition of NaOX in a compound or only 1? Please let me know 

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Asked by prakriti12oct 15th June 2019, 1:43 PM
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CBSE - XII Science - Physics

Which material is used for making heating coils and why?  

Asked by Ss279728 14th June 2019, 9:33 PM
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CBSE - XII Science - Physics

An alpha particle and a proton enters in crossed magnetic field with same kinetic energy. find the ratio of their radii. 

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Asked by shaileshbhagat82816 14th June 2019, 12:29 PM
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CBSE - XII Science - Physics

a copper wire ring of radius 15cm is given a charge 100uc.find the electric potential and the intensities at the center of the ring and the point on the axis at a distance 10cm from its center  

Asked by bhushankr113 13th June 2019, 10:20 PM
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CBSE - XII Science - Physics

Two charges q and qa placed at a separation d in air experience a force of 12 N. If the separation is changed to d', the force becomes 3 N. What is the value of d' in terms of d?

Asked by shitikanthdas31 11th June 2019, 9:02 AM
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CBSE - XII Science - Chemistry - Electrochemistry

Estimate the mass of copper metal produced during the passage of 5A current through CuSO4 solution for 100 minutes.the molar mass of Cu is 63.5g mol-1.

Asked by jaiswalishika960 4th June 2019, 2:49 PM
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