The wavelengths of Ka x-rays of two metals ‘A’ and ‘B’ are and
respectively, where ‘R’ is Rydberg's constant. The number of elements lying between ‘A’ and ‘B’ according to their atomic numbers is
According to Moseley's equation
For particle; n1 =2,n2 =1
For metal A ;
For metal B;
Therefore, 4 elements lie between A and B, i.e. with Z= 27, 28 ,29 , 30
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5 g of Na2SO4 was dissolved in x g of H2O. The change in freezing point was found to be 3.820C. If Na2SO4 is 81.5% ionised, the value of x (K
A capacitor is made of two square plates each of side 'a' making a very small angle
A solution of m-chloroaniline, m-chlorophenol and m-chlorobenzoic acid in ethyl acetate was extracted initially with a saturated solution of NaHCO3 to give fraction A. The leftover organic phase was extracted with d