List of top Chemistry Questions

Out of molality (m), molarity (M), formality (F), normality (N) and mole-fraction (x), the two quantities, independent of temperature, are:

A 3d-electron having spin quantum number, $ s=+\frac{1}{2}, $ can have a magnetic quantum number:

Which of the following is a sulphide ore?

Which of the following is not correct about transition metals ?

Which of the following is urotropine?

Which of the following does not give yellow ppt.with $I_2/NaOH$ ?

Which of the following contains cobalt?

Which of the following compounds is known as white vitriol?

Thermite is a mixture of

The strongest bronsted base among the following anions is

The reaction of Ethanol with $H_2SO_4$ does not give

The $pH$ value of human blood is about

The pH of $0.001( N )$ acetic acid solution, which is $10 \%$ dissociated. is

The number of molecules in $4.25\, g$ of ammonia is approximately

The hydrogen atom can give spectral lines in the Lyman, Balmer Paschen series. Which of the following statement is correct?

The hybrid state of positively charged carbon in vinyl carbocation is $ (C{{H}_{2}}=C{{H}^{+}}--) $ :

$ N _{2}+3 H _{2} \rightleftharpoons 2 NH _{3} $ The equilibrium constant for the reaction is $K$, then the equilibrium constant or the equilibrium for the reaction given beloow is: $ NH _{3} \rightleftharpoons \frac{1}{2} N _{2}+\frac{3}{2} H _{2} $

Sodium phenoxide reacts with $CO_2$ at 400 K and 4.7 atm pressure to give

Riboflavin is:

In the reaction sequence: $ {CaC2 ->[H_2O] A}$$ { ->[{\text{dil}} HgSO_4][HgSO_4] }$$ {B ->[H_2/Ni] C}$, the term ????is

In the reaction: $2P_{2}O_{5}+2HNO_{3}\to P_{4}O_{10}+x,$ the term $x$ is

If active mass of a $6\%$ solution of a compound is $2$, its molecular weight will be

Hydrolysis of beryllium carbide produces

Gun metal is an alloy of copper and tin with:

Bismuth chloride $(BiCl_3)$, on hydrolysis, yields a white precipitate of