Name the contribution made by the following physicists(i) Maxwell(ii) Max Planck(ii) C.V. Raman(iv) de Broglie

Samples of four metals A,B,C and D were taken and added to the following solutions one by one.The results obtained have been tabulated as follows. Use the table above to answer the following questions about metals A,B,C and D. (i)Which is the most reactive metal? (ii)What would you observe if B is added to a solution of copper (II) sulpahate? (iii)Arrange the metals A,B,C and D in the order of decreasing reactivity.

Test which of the following is solutions of x^2-5x+6=0 i)2,ii) -3 ,iii) -2 ,iv)3

Write IUPAC name of the following : (i) Na_2[Fe(CN)_5NO] (ii) [Fe(H_2O)_5NO]SO_4

Test which of the following is solutions of x^2-3x-10=0 i)2,ii) -5 ,iii) -2 ,iv)5

Choose the correct one Which of the following is not an A.P. (i)1,4,7.... (ii)(-5),(-2),1,4..... (iii)3,7,12,18..... (iv)11,14,17,20…

Define the following with example. (i)Order (ii) Class (iii) phylum (iv) kingdom (v) Herbarium sheet (Vi) Taxonomic key