AP EAMCET201822 Apr 2018Morning ShiftChemistryp Block Elements (Group 13 & 14)Actual
Assertion ( A ) [ SiF ₆ ]²⁻ is formed but [ SiCl ₆ ]²⁻ is not Reason (R) Electronegativity (EN) of F is higher than EN of Cl
Options
- ABoth (A) and (R) are correct and (R) is the correct explanation of (A)
- BBoth (A) and (R) are correct but (R) is not the correct explanation of (A)
- C(A) is correct but (R) is not correct
- D(A) is not correct but (R) is correct
Correct answer
B. Both (A) and (R) are correct but (R) is not the correct explanation of (A)
Step-by-step solution
SiF ₆²⁻ is formed but SiCl ₆²⁻ is not because Cl has greater size than F . Therefore, larger size of anions cannot form complex with silicon. Electronegativity of F is higher than Cl but cannot explain about Assertion. Thus, Assertion and Reason both are correct but Reason (R) is not the correct explanation of (A).