$(d)\;(-1,7)$

(a) x

$(d)\;none\;of\;these$

(d) none of these

$(d)\;none\;of\;these$

(b) $\omega$

(a) externally

(c) $\large\frac{3}{4}$

(d) 6,-1

$(c)\;2xe^{\sqrt x}-4 \sqrt x e^{\sqrt x}+c $

(c) a straight line through the orgin

$(a)\;x^2+y^2-2x-2y+1=0$

$(b)\;\large\sqrt {\frac{2}{3}} $

(c) 5

$(a)\;\large\frac{2}{3}$

$(b)\;\large\frac{(-3,5,11)}{\sqrt {155}}$

(b) 5

$(c)\;\tan 5x \; \tan 3x\;\tan 2x$

$(b)\;\large\frac{-2}{1+x^2}$

$(b)\;(4,8/3)$

$(b)\;^{10}C_5 \times ^8C_4$

(b) 7

(b) hydrofluoric acid

$(a)\;19 p;\;20n\;and \; 19\;e^-$

(b) 0.05 M

$(c)\;N_2O_5$

(d) ionic,covalent and co-ordinate covalent bond

(c) 10:1

(a) They are all diatomic and forms univalent ions

$(b)\;H_2+I/2O_2  \;\to\;2 H_2O; \Delta H=-58\; kcal$

(d) -8

(a) diamagnetic

(d) aluminimum decreases and that of germanium increases

$(b)\;\large\frac{-Q}{4}$

(d) time

(d) zero

$(b)\;\bigg[1-\frac{1}{n^{1/3}}\bigg] $

(a) 500 N

(d) the voltage across the plates increases

(c) 1 s

(d) the maximum KE is 150 J

(c) centrifugal force is more at the equator than at poles

(d) 1:25

(c) 24.2 m

(b) (235,94)

(a) 16

(a) the bead moves downwards and stops as soon as the field is switched on

(a) energy and torque

$(b)\;\large\frac{\mu\;x}{c}$

$(b)\;\large\frac{c+3A-s}{3}$