List of top Chemistry Questions

The correct statement(s) for the following addition reactions is(are)

The correct statement(s) about the oxoacids, $HClO_4$ and $HClO$, is(are)

Allene $ (C_3H_4) $ contains

Which of the following pairs of organic compounds give positive Tollens? test?

The geometry and type of hybrid orbital present around the central atom in $ BF_3 $ is

$ IF_7 $ is known to exist while $ BrF_7 $ does not exist. The reason is

Which of the following elements involves gradual filling of $ 4f $ -levels?

The monomer used in Novolac, a polymer used in paints

Galbriel phthalimide synthesis is used in the preparation of primary amine from phthalimide, which of the following reagent is not used during the process ?

Extraction of chlorine from brine solution is based on

The atom of largest size among the following is

Give the possible structure of $X$ in the following reaction : $C_6 H_6 + D_2 SO_4 \xrightarrow{D_2O} X$

$CH _{3} C \equiv CCH _{3} \xrightarrow{H 2 / P t} A \xrightarrow{D_{2} / P t} B$ The compounds $A$ and $B$, respectively are

The normality of $26\%$ (wt/vol) solution of ammonia (density $= 0.855$ ) is approximately :

Which of the following compound has all the four types $\left(1^{\circ}, 2^{\circ}, 3^{\circ}\right.$ and $\left.4^{\circ}\right)$ of carbon atoms?

At what temperature, the rate of effusion of $N_2$ would be $1.625$ times than that of $SO_2$ at $50^{\circ} C$ ?

Which of the following has two stereoisomers?

$1.25\, g$ of a sample of $Na _{2} CO _{3}$ and $Na _{2} SO _{4}$ is dissolved in $250\, ml$ solution. $25 ml$ of this solution neutralises $20\, ml$ of $0.1\, N\, H _{2} SO _{4}$. The $\%$ of $Na _{2} CO _{3}$ in this sample is

Formation of polyethylene from calcium carbide takes place as follows $ CaC _{2}+2 H _{2} O \longrightarrow Ca ( OH )_{2}+ C _{2} H _{2}$ $C _{2} H _{2}+ H _{2} \longrightarrow C _{2} H _{4} $ $ nC _{2} H _{4} \longrightarrow\left(- CH _{2}- CH _{2}-\right) n$ The amount of polyethylene obtained from $64.1\, kg$ of $CaC _{2}$ is

A compound of Xe and F is found to have 53.5% of Xe. What is oxidation number of Xe in this compound ?

The hypothetical complex chloropentaamminecobalt (III) chloride can be represented as

Nucleotides are joined together by between $ 5' $ and $ 3' $ carbon atoms of pentose sugar

The degree of dissociation of $P C l_{5}(\alpha)$ obeying the equilibrium $PCl _{5} \rightleftharpoons PCl _{3}+ Cl _{2}$ is related to the equilibrium pressure by

If a mole of C$_3$H$_8$ is reacted with 2.5 moles of O$_2$ how many moles of H$_2$O will be produced ?