List of top Chemistry Questions

What are X and Y in the following reaction sequence?

Arrange the following polymers in increasing order of intermolecular forces:

Statement I: Boiling point of diethyl ether < 1-butanol.
Statement II: Diethyl ether miscible with water to almost same extent as 1-butanol.

Source for vitamin C and vitamin E respectively are:

Isopentyl alcohol reacts with reagent X → carboxylic acid → decarboxylation → Y. Reaction of Y with Z → t-butyl alcohol. Identify X and Z.

Assertion (A): The order of acidic strength of hydrogen halides in aqueous solution is HF < HCl < HBr < HI.
Reason (R): The order of bond dissociation enthalpy of hydrogen halides is HF > HCl > HBr > HI.

Match the following compounds with their uses:

Freundlich adsorption isotherm: log(mx) vs log(p) increases then flattens (points C-D). Experimental condition represented by C-D?

IUPAC name of [Co(NH$_3$)$_4$(H$_2$O)Cl]Cl$_2$ is:

Change in oxidation state of sulphur during oxidation of thiosulphate ion in neutral/alkaline solution by KMnO$_4$ is:

Among noble gases, the most abundant one in atmosphere is:

In which of the following, metal is not correctly matched with its refining process?

Identify the crystal system in which body-centered lattice is not present.

Mole fraction of H$_2$SO$_4$ in aqueous solution is 0.9. Find mass % of H$_2$SO$_4$. (H=1, S=32, O=16 u)

X and Y in reactions:

At 298 K, equilibrium: M(s)+2Ag$^+$(aq)→M$^{2+}$(aq)+2Ag(s), K=10$^{15}$, ΔS=10 J/K. Find ΔrH (kJ/mol). FRT×2.303=0.06, F=96500 C/mol.

An alcohol 'X' (C$_4$H$_{10}$O) reacts with conc. HCl at room temperature and gives chloride. 'X' on dehydration followed by ozonolysis gives 'Y' and 'Z'. Find 'Y' and 'Z'.

Increase in concentration of 'X' in blood of pregnant women who smoke may induce premature delivery. What is 'X'?

X and Y in reaction sequence:

Identify correctly matched sets:
I. NaHCO$_3$ - fire extinguisher
II. Na$_2$CO$_3$ - water softening
III. NaOH - purification of bauxite

Correct statements regarding halides of group 14 elements:
I. Stability of dihalides: SiX$_2$ > GeX$_2$ > SnX$_2$ > PbX$_2$
II. SnF$_4$, PbF$_4$ are ionic
III. PbI$_4$ does not exist

The reaction/s which represent the production of diborane on an industrial scale is/are:
I. 4BF$_3$ + 3LiAlH$_4$ → 2B$_2$H$_6$ + 3LiF + 3AlF$_3$
II. 2NaBH$_4$ + I$_2$ → B$_2$H$_6$ + 2NaI + H$_2$
III. 2BF$_3$ + 6NaH → B$_2$H$_6$ + 6NaF

Among alkaline earth metals, metal with least melting point is:

IUPAC names of benzene derivatives are respectively:

Which of the following is used as stabilizer for H$_2$O$_2$?