List of top Chemistry Questions

Which of the following compounds when heated with $CO$ at $150^{\circ} C$ and $500$ atm pressure in presence of $BF _{3}$ forms ethyl propionate ?
When acetaldehyde is heated with Fehling solution, a red precipitate is formed. Which of the following is that?
Which of the products is formed when acetone is reacted with barium hydroxide solution?
What is the correct order of occurrence ($\%$ by weight) in air of $Ne , Ar$ and $Kr$ ?
Which of the following is added to chloroform to slow down its aerial oxidation in presence of light?
A solution of an acid has $\left[ H ^{+}\right]=2 \times 10^{-5}$. Find out the concentration of $OH ^{-}$ions.
From Williamson's synthesis preparation of which of the following is possible?
The disperse phase, dispersion medium and nature of colloidal solution (lyophilic or lyophobic) of 'gold sol' respectively, are
What is the equation for the equilibrium constant $ ({{K}_{c}}) $ for the following reaction? $ \frac{1}{2}A(g)+\frac{1}{3}B(g)\frac{2}{3}C(g) $
$ A\,\,0.5\,\,g/L $ solution of glucose is found to be isotonic with a $ 2.5\,\,g/L $ solution of an organic compound. What will be the molecular weight of that organic compound?
$ t- $ butyl chloride preferably undergo hydrolysis by
What is the wavelength (in $ m $ ) of a particle of mass $ 6.62\times {{10}^{-29}}g $ moving with a velocity of $ {{10}^{3}}\,\,m{{s}^{-1}} $ ?
What is the electrode potential (in $ V $ ) of the following electrode at $ {{25}^{o}}C $ ? $ N{{i}^{2+}}(0.1\,\,M)|Ni(s) $ (Standard reaction potential of $ N{{i}^{2+}}|Ni $ is $ -0.25\,\,V,\,\,\frac{2.303RT}{F}=0.06) $
Calculate the concentration of $NaOH$ solution in g/ml. which has the same normality as that of a solution of $HCl$ of concentration $0.04 \,g/ml$
The solution of $AlCl_3$ in water is acidic due to
Which is not fat soluble vitamin?
Units of rate constant for first and zero order reactions in terms of molarity $M$ unit are respectively
Which of the following molecules posesses trigonal bipvramidal geometry.
The atomic number of an element $M$ is $26$. How many electrons are present in the $M$-shell of the element in its state
Tropylium cation is aromatic in nature.
The only property that determines its aromatic behaviour is its planar structure.
Colloidal solutions are stable but colloidal particles do not settle down. Brownian movement counters the force of gravity actively on colloidal particles.
Bleaching powder reacts with dilute acids to evolve chlorine. The chlorine liberated by the action of dilute acids on bleaching powder is called available chlorine.
Which of the following chemical reactions depicts the oxidizing behaviour of $H_{2} SO_{4}$ ?
How many moles of magnesium phosphate, $Mg_{3} \left(po_{4}\right)_{2}$ will contain 0.25 mole of oxygen atoms ?
HBr reacts with $CH_{2} =CH-OCH_{3}$ under anhydrous conditions at room temperature to give: