If `M_A` gram of metal `A` displaces `m_B` gram of another metal `B` from its salt solution and if the equivalent mass are `E_A and E_B` respectively then equivalent mass of A can be expressed as :

If m_(A) gram of a metal A displaces m_(B) gram of another metal B from its salt solution and if the equilvalent mass are E_(A) and E_(B) respectively then equivalent mass of A can be expressed as:

A,B and C constitute the doberiner's traid. Atomic mass of a and c are 7 and 23 respectively' calculate atomic mas of B.

A point particle of mass M is attached to one end of a massless rigid non-conducting rod of length L. Another point particle of the same mass is attached to the other end of the rod. The two particles carry charges +q and -q respectively. This arrangement is held in a region of a uniform electric field E such that the rod makes a small angle theta (say of about 5 degree) with the field direction, fig. Find an expression for the minimum time needed for the rod to become parrallel to the field after it is set free.

On heating 0.220 g of a metallic oxide in presence of hydrogen,0.045 g of water is formed. If the equivalent mass of the metal is E,then what is the value of E/9

Which one of the following four metals would be displaced from the solution of its salt by other three metals?

Equal mass of a soute are dissolved in equal mass of two solvents A and B and formed very dilute solution. The relative lowering of vapour pressure for the solution B has twice the relative lowering of vapour pressure for the solution A. If m_(A) "and" M_(B) are the molecules mass of solventds A and B respectively, then :

E^@ of three metals A, B, C are -1.4 V, + 0.6V, - 3.4V respectively. The reducing power of these metals are in order :

Three particles each of mass m are placed at the corners of a right angled triangle as shown in figure if OA=a and OB=b, the position vector of the centre of mass is: .