List of top Chemistry Questions

For a gaseous reversible reaction, which of the following expressions is correct?
When phosphorus reacts with caustic soda, the products are $PH _{3}$ and $NaH _{2} PO _{2}$. This reaction is an example of
$Mg^{2+}$ is isoelectronic with
Shape of $ XeF_4$ molecule is
A brown ring appears in the test for
At the high pressure, Langmuir adsorption isotherm takes the form
Which of the following is combustion reaction?
Which of the following nuclear reactions will generate an isotope?
Which of the following reactions will yield $2, 2$-dibromopropane ?
Which one of the following conformation of cyclohexane is chiral?
Which one of the following is a vitamin?
$XeF_6$ on complete hydrolysis produces
Which of the following coordination compounds would exhibit optical isomerism?
Which is not true statement?
The triple point of water is
The graph of pressure P and $ \left( \frac{1}{Volume,(V)} \right) $ of1 mole of an ideal gas at constant temperature is
The triple point of water is
The stable electronic configuration of chromium is
The stability of dihalides of $Si, Ge, Sn $ and $Pb$ increases steadily in the sequence
The reaction of toluene with $Cl_2$ in presence of $FeCl_3$ gives predominantly
The monomer of the polymer
The ionization energy of $10$ times ionized sodium atom is
The hardness of water sample containing $ 0.002 $ mole of magnesium sulphate dissolved in a litre of water is expressed as
The equlibrium constant for the reaction $ 2N{{O}_{2}}(g) \rightleftharpoons 2NO(g)+{{O}_{2}}(g) $ is $ 2\times {{10}^{-6}} $ at $ 185{}^\circ C $ . Then the equilibrium constant for the reaction, $ 4NO(g)+2{{O}_{2}}(g) \rightleftharpoons $ $ 2N{{O}_{2}}(g) $ at the same temperature would be
The element which is the most abundant in the earth crust is