Q. 394.1( 21 Votes )

Considering the elements B, C, N, F, and Si, the correct order of their non-metallic character is:

(a) B > C > Si > N > F (b) Si > C > B > N > F

(c) F > N > C > B > Si (d) F > N > C > Si > B

Class 11th NCERT - Chemistry Part-I 3. Classification of Elements and Periodicity in Properties

Answer :

The non-metallic character of elements increases from left to right across a period. Thus, the decreasing order of non-metallic character is F > N > C > B. Again, the non-metallic character of elements decreases down a group. Thus, the decreasing order of non-metallic characters of C and Si are C > Si. However, Si is less non-metallic than B i.e., B > Si. Hence, the correct order of non-metallic characters of the elements B, C, N, F, and Si is F > N > C > B > Si.

Therefore, the correct option is - (c) F > N > C > B > Si.

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PREVIOUSConsidering the elements B, Al, Mg, and K, the correct order of their metallic character is:(a) B > Al > Mg > K (b) Al > Mg > B > K(c) Mg > Al > K > B (d) K > Mg > Al > B NEXTConsidering the elements F, Cl, O and N, the correct order of their chemical reactivity in terms of oxidizing property is:(a) F > Cl > O > N (b) F > O > Cl > N(c) Cl > F > O > N (d) O > F > N > Cl

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