If two element can combine to form more than one compound,the masses of one element that combine with a fixed mass of the other element are in whole number ratio.
(a) Is that statement is true ? (b) If yes ,according to which law ? (c) Give one example ralated to this law .

Suppose two elements X and Y combine to form two compound XY_2 and X_2Y_3 weigh 85g . The atomic masses of X and Y are respectively :

Give one example of : a combination reaction between element and compund

One mole of element X has 0.444 times the mass of one mole of element Y. One atom of element X has 2.96 times the mass of one atom of 12_C. What is the atomic mass of y ?

Two elements X (at.mass 16) and Y (at.mass 14) combine to form compounds A,B and C . The ratio be different masses of Y which combine with a fixed mass of X in A,B and C is 1 : 3 : 5. If 32 parts by mass of X combines with 84 parts by mass of Y in B then in C,16 parts by mass of X will combine with :

Explain the following statements- Alloys are made up of mixture of two or more than two metals or non-metals or elements combined in definite proportions.

Two elements A (Atomic mass = 75) and B(Atomic mass =16) combine to give a compound having 75.8% A. Calculate the relative number of atoms present in B.

The objective and eye pieces used in a compound microsciope are not single lenses but are the combinations of more than one lenses placed in contact with each other. Explain why?

A pair of parallel horizontal conducting rails of negligible resistance shorted at one end is fixed on a table. The distance between the rails is L. A conducting massless rod of resistance R can slide on the rails frictionlessly. The rod is tied to a massless string which passes over a pulley fixed to the edge of the table, A mass m, tied to the other end of the string hanges vertically. A constant magnetic field B exists perpendicular to the table. If the system is released from rest, calculate. the terminal velocity achieved by the rod.

A pair of parallel horizontal conducting rails of negligible resistance shorted at one end is fixed on a table. The distance between the rails is L. A conducting massless rod of resistance R can slide on the rails frictionlessly. The rod is tied to a massless string which passes over a pulley fixed to the edge of the table, A mass m, tied to the other end of the string hanges vertically. A constant magnetic field B exists perpendicular to the table. If the system is released from rest, calculate. the acceleration of the mass at the instant when the velocity of the rod is half the terminal velocity.