compụte the square roots of these. a) 256 b) 2025 c) 441 d) 9216 e) 1089 f) 15625 g) 1936 h) 3025 i) 12544

Which of the fractions below are perfect squares? a) 4/(15)" " b) 8/9" " 'c) 16/(25)" " d) (2 1)/4" " e) (4 1)/9 " " f) 8/(18)

Match the problems with the answers. (a) 128 xx 47 (b) 1.28 xx 4.7 (c) 12.8 xx 0.47 (d) 0.128 xx 4.7 (e) 6.016 (f) 6016 (g) 0.6016

1.0 g of a weak monobasic acid HA in 100 g water lowers the freezing point by 0.155 K. If 0.45 g, of same acid requires 15 mL of N/5 NaOH solution for complete neutralistion then %, degree ofionization of acid is (K_f " of H"_(2)O="1.86 K kg mol"^(-1)) . a)0.2 b)0.25 c)0.4 d)0.5

Categorize the following as nucleophile and electrophile : a) HS^- b) BF_3 c) NO_2^+ d) C_2H_5O e) (CH_3)_3N f) NH_2^-

Which of the following arrangements does not represent the correct order of the property stated against it? a)N i 2 + < C o 2 + < F e 2 + < M n 2 + : Ionic size b)C o 3 + < F e 3 + < C r 3 + < S c 3 + Stability in aqueous solution c)Sc < Ti < Cr < Mn: Number of oxidation states d)V 2 + < C r 2 + < M n 2 + < Fe^(2+) : Paramagnetic behaviour

Let f(x) =sinx,g(x)=x^(2)andh(x)=log_(e)x . If F(x)=(hogof)(x) , then F''(x) is equal to a) acosec^(3)x b) 2cotx^(2)-4x^(2)cosec^(2)x^(2) c) 2xcotx^(2) d) -2cosec^(2)x

i. Write the electronic configuration of the following ions: (a) 'H^-' (b) 'Na^+ ' (c) 'O^(2-)'(d) 'F^-'

Draw x, y axis and mark the points A(0,5), B(0,-2), C(4,0), D(-3,0), E(4,5), F(-3,-2), G(4,-2).