List of top Chemistry Questions

The reaction: $ {C2H5OH + SOCl2 ->[{\text{Pyridine}}] C2H5Cl + SO2 + HCl}$ is known as

The property utilized in the manufacture of lead shots is

Which of the following is weakest bond?

An alcoholic drinks substance $ pH=4.7 $ then $ ^{-}OH $ ion concentration of this solution is:

Which of the following has lowest first ionization energy?

Which of following is not Lewis base?

An element have atomic weight $40$ and its electronic configuration is $1 s^{2} 2 s^{2} 2 p^{6} 3 s^{2} 3 p^{6}$. Then its atomic number and number of neutrons will be:

Which quantum number is not related with Schrodinger equation?

The relationship between ionization and change in concentration of any weak electrolyte is represented as:

Which compound decolorizes iodine solution?

The magnetic quantum number of valence electron of sodium $ (Na) $ is:

The oxidation number of sulphur in $Na_2S_4O_6$ is

The highest oxidation state shown by Mn is:

$ SN^1$ reaction is feasible in :

Racemic mixture is formed by mixing two :

$pH$ of $0.005 M$ calcium acetate $\left( p K_{a}\right.$ of $CH _{3} COOH =4.74$ ) is :

Oxidation number of $Cl$ in $CaOCl _{2}$ (bleaching powder) is :

One mole of a non-ideal gas undergoes a change of state (2.0 atm, 3.0 L. 95 K ) $\rightarrow$ (4.0 atm. 5 0 L, 245 K) with a change in internal energy, $\Delta$E = 30.0L-atm. The change in enthalpy ($\Delta$ H) of the process in L-atm is

Number of lone pairs of electrons on Xe atoms in $XeF_2, XeF_4$ and $XeF_6$ molecules are respectively

Most common oxidation states shown by cerium are

Lucas test is used for the determination of

In the reaction : $ {C6H5CHO + C6H5 NH2 ? C6H5N = HCC6H5 + H2 O,}$ the compound $ {C6H5N = HCC6H5}$ is known as

In an organic compound of molar mass $108 g$ $mol ^{-1} C , H$ and $N$ atoms are present in 9: 1: 3.5 by weight. Molecular formula can be :

Ethers are quite stable towards :

Enzymes with two sites are called