Class 12th

Ranitidine, cimetidine and magnesium hydroxide are antacids.

Serotonin is a tranquilizers.

Correct order of reducing character is

NH₃ < PH₃ < AsH₃ < SbH₃ < BiH₃

  $P_T=P_A^o{X}_A+P_B^o{X}_B$

$170=200X_A+100\left(1-X_A\right)$

$170=200X_A+100-100X_A$  

X_A = 0.7                   X_B = 0.3

$Y_A=\frac{P_A^o{X}_A}{P_T}=\frac{0.7*200}{170}=0.82$ f

Calamine -> ZnCO₃    

Please find the answer below

The carbonyl compounds which contain at least two a-hydrogen will give aldol condensation.

Kindly consider the following figure

Kindly consider the following figure

Because E points along the tangent to the lines of force. If initial velocity is zero then due to the force, it always moves in the direction of E. Hence will always move on some lines of force

In Case I when both are positively charged, due to induction positive charge moves outwards on spheres, increasing effective distance between centres of charge causing magnitude of the force to decrease.