Chemistry MCQs for NEET — Practice Questions with Answers

Following reaction describes the rusting of iron 

$4\mathrm{Fe}+3{\mathrm{O}}_2\to 4{\mathrm{Fe}}^{3+}+6{\mathrm{O}}^{2-}$

Which one of the following statement is incorrect ?

Which reaction does not represent auto redox or disproportionation ?

Which of the following is redox reaction ?

Which of the following is a redox reaction ?

For the redox reaction, ${\mathrm{MnO}}_4^{-}+{\mathrm{C}}_2{\mathrm{O}}_4^{2-}+{\mathrm{H}}^{+}\to {\mathrm{Mn}}^{2+}+{\mathrm{CO}}_2+{\mathrm{H}}_2\mathrm{O}$ the correct coefficients of the reactants for the balanced reaction are respectively ${\mathrm{MnO}}_4^{-},{\mathrm{C}}_2{\mathrm{O}}_4^{-},{\mathrm{H}}^{+}$;

Balance the following equation and choose the quantiy which is the sum of the coefficients of the products :

$....{\mathrm{CS}}_2+.....{\mathrm{Cl}}_2\to {\mathrm{CCl}}_4+....{\mathrm{S}}_2{\mathrm{Cl}}_2$

Balance the following equation and choose the quantiy which is the sum of the coefficients of reactants and products :

$...{\mathrm{PtCl}}_4+...{\mathrm{XeF}}_2\to {\mathrm{PtF}}_6+....\mathrm{CIF}+...\mathrm{Xe}$

In the following redox reaction, 

${\mathrm{xFe}}^{2+}+{\mathrm{yCr}}_2{\mathrm{O}}_7^{2-}+14{\mathrm{H}}^{+}\to 6{\mathrm{Fe}}^{3+}+2{\mathrm{Cr}}^{3+}+{\mathrm{zH}}_2\mathrm{O}$

The value of x,y,z are :

Balance the following reaction an find the value of a,b and g respectively :

${\mathrm{aKMnO}}_4+{\mathrm{bH}}_2{\mathrm{O}}_2+6{\mathrm{H}}_2{\mathrm{SO}}_4\to \mathrm{d} {\mathrm{MnSO}}_4+{\mathrm{eK}}_2{\mathrm{SO}}_4+\mathrm{f} {\mathrm{O}}_2+\mathrm{g} {\mathrm{H}}_2\mathrm{O}$

0.1 mole of ${\mathrm{H}}_3{\mathrm{PO}}_{\mathrm{x}}$ is completely neutralised by 5.6 g KOH then thr true statement is :