Ncert Solutions Chemistry Class 12th

Zn₂₊ has no unpaired electron and colourless in aqueous solution.

$RC=CR\text{'}+H_2\underset{BaS{O}_4}{\overset{Pd/C}{?}}$

Ranitidine, cimetidine and magnesium hydroxide are antacids.

Serotonin is a tranquilizers.

Correct order of reducing character is

NH₃ < PH₃ < AsH₃ < SbH₃ < BiH₃

Calamine -> ZnCO₃    

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

Kindly consider the following figure

Hybridisation = sp³d²

Shape – square planar

Higher the acidic strength, lower will be the value of pK_a.

Correct order of pK_a is

$C{H}_{3}COOH>C_6{H}_{5}COOH>HCOOH>O_{2}NC{H}_{2}COOH$