List of top Chemistry Questions

The anion $ O^- $ is isoelectronic with
Sucrose is made up of
Principle of paper chromatography is based on
Predict the correct shape of $ BH_{4}^{-} $ .
Kjeldahl method for estimation of nitrogen is not applicable to
In which of the following the hydration energy is higher than the lattice energy?
Consider the following complex ions, $P, Q$ and $R$. $P=[FeF_6]^{3-},Q=[V(H_2O)_6]^{2+} and \, R=[Fe(H_2O)_6]^{2+} $ The correct order of the complex ions, according to their spin-only magnetic moment values (in $B.M.$) is
$ [Co(NH_3)_5Br)] \,SO_4 $ and $ [Co(NH_3)_5SO_4] \,Br $ are examples of which type of isomerism ?
An ion with mass number $37$ possesses one unit of negative charge. If ion contains $11.1\%$ more neutrons than electrons, the symbol of the ion, $X$, is
The compound that does not liberate $CO_2$, on treatment with aqueous sodium bicarbonate solution, is
The hyperconjugative stabilities of tert-butyl cation and 2-butene, respectively, are due to
The carbon-based reduction method is not used for the extraction of
Upon treatment with ammoniacal $H_2 S$, the metal ion that precipitates as a sulphide is
Among $P, Q, R$ and $S$, the aromatic compounds(s) is/are
Acid anhydride on reaction with primary amines give
What is the total number of electrons that can have the values $n=2, l=1, s=1 / 2$ in the electronic configuration $1 s^{2} 2 s^{2} 2 p^{3} ?$
Calculate the wavelength associated with an electron moving with a velocity of $10^{6} m / s$ (mass of $e^{-}=9.1 \times 10^{-31} kg,\, \left. h=6.6 \times 10^{-34} kg\, m ^{2} s ^{-1}\right)$
Which of the following pairs is not correctly matched?
The bond order of $N _{2}^{+}$on the basis of molecular orbital theory is [Atomic number of $N =7$ ]
Above the Boyle temperature, the compressibility factor of the real gases, $ Z $ is
The expression for effective magnetic moment $ (\mu _{\text{eff}}) $ is
The known oxidation states for both $V$ and $CO$ are
The structure of diamagnetic nickel complex, $\left[N i(C N)_{4}\right]^{2-}$ is
An ether solution of benzoic acid $ (A) $ aniline $ (B) $ and toluene $ (C) $ is extracted with aqueous $ NaOH $ . The ether layer will contain what compound $ (s) $ after the extraction ?
Which of the following compounds reacts faster with sodium methoxide $ (NaOCH_3) $ ?