List of top Chemistry Questions

Which of the following is known as fusion mixture?
Schotten-Baumann reaction is a reaction of phenols with
The acid which has a peroxy linkage is
The formula for calcium chlorite is
The four elements that make up 99% of all elements found in a living system are
50 mL of hydrogen diffuses out through a small hole of a vessel, in 20 minutes. The time taken by 40 mL of oxygen to diffuse out is
Which of the following compounds will be most easily attacked by an electrophile ?
The total number of valence electrons in 4.2 g of $N_3^{-}$ ion is [$N_A$ is the Avogadro's number)
Which of the following is not true about e.m.f. of a cell?
The type of isomerism not exhibited by alkenes is
When alkyl halides are heated with dry $Ag_2O$, they give
Which of the following gases will have the highest rate of diffusion?
Acetamide and ethylamine can be distinguished by reacting with
An aqueous solution containing 1 g of urea boils at 100.25$^\circ$C. The aqueous solution containing 3 gof glucose in the same volume will boil be
Equal volumes of 0.1 M $AgNO_3$ and 0.2 M NaCl are mixed. The concentration of $NO^-_3$ ions in the mixture will be
A bivalent metal has the equivalent weight of $12$. The molecular weight of its oxide will be
The weight of a metal of equivalent weight $12$, which will give $0.475\, g$ of its chloride, is
Heterolytic fission of an organic covalent bond gives only
Which of the following has unchanged valency ?
The compound containing coordinate bond is
Which of the following will not undergo aldol condensation?
Which of the following elements will have the highest electron affinity ?
When excess of water is added to $BiCl_3$ solution
When chloroform is exposed to air and sunlight, it gives
Which one of the following elements can have both positive and negative oxidation state ?