List of top Chemistry Questions

In diborane, the number of electrons that account for bonding in the bridges is
In borax the number of $B-O-B$ links and $B-OH$ bonds present are, respectively,
Which of the following is the weakest base?
Which of the following sets of quantum numbers is not possible?
Which one of the following is a strong base?
Which one of the following is ferromagnetic?
Who proposed dual nature of electron?
Wilkinson's catalyst is used for
Wurt'z reaction of methyl iodide yields an organic compound X. Which of the following reaction also yields X?
The volume occupied by $ 16\,g $ of oxygen gas at $ STP $ is
The magnitude of the charge on the electron is $ 4.8 \times 10^{-10}\, esu $ . What is the magnitude of the charge on the proton on the nucleus of a helium atom ?
The degree of ionisation of $HF$ in $0.100\, M$ aqueous solution is (freezing point of the solution $ =-0.197^{\circ} C $ and $ K_{f} $ for water $ =186^{\circ}C) $
The correct order of electron gain enthalpy with negative sign of $F, Cl, Br$, and $I$, having atomic number $9,17,35$ and $53$ respectively, is
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