[" 14.Which of the following elements can show covalency greater than "4?],[" (i) Be "],[" (ii) "P],[" (iii) "S],[" (fiv) "B]

Which of the following elements does not show variable covalency? AI, P, S, CI

Which of the following elements present in an organic compound are detected are Lassaigne's test? (i) P (ii) X (iii) S (iv) N

Which of these elements have almost same electronegativity? (i) C,I (ii) P, H (iii) N, Cl (iv) Br,S

Which of the following elements do not follow the general trends? (i) s -block elements (ii) p- block elements (iii) f -block (iv) d- block elements

First I.P. of Be is greater than B.

Which element in each of the following pairs has higher electronegativity (i) K & Cu, (ii) P & S, (iii) C & Si.