KEAM 2018 Physics and Chemistry Paper

Electronegativity increases on moving left to right in a period and decreases for the period below it (∵n= increases)
∵(N and C) and (Si and P) respectively belongs to (n=2) and (n=3)
∴ Electronegativity of N> electronegativity of C and electronegativity of P> electronegativity of Si
Hence, correct order is:
Si<P<C<N