Class 12th

If heat produced in 4Ω is H cal/sec. then in 6Ω it is :– (in cal/sec.)

If an insulated non conducting sphere of radius R has charge density ρ, the electric field at a distance r from the centre of sphere (r < R) will :-

Three charges Q,(+q) and (+q) are placed at the vertices of an equilateral triangle of side ℓ as shown in the figure. If the net electrostatic energy of the system is zero, then Q is equal to :-

 

At 25°C the standard emf of cell having reactions involving two electrons change is found to be 0.295 V. The equilibrium constant of the reaction is :

Kindly consider the following 

Which of the following will not give ether as product :-

Which is most reactive towards electrophilic aromatic substitution reaction :-

Which one of the following ions is the most stable in aqueous solution ?

(At. No. Ti = 22, V = 23, Cr = 24, Mn=25)

Which of following is an example of super octet molecule ?

In thermodynamics, a process is called reversible when:-