COMEDK 2025 Evening Shift | Hydrocarbons Question 14 | Chemistry

Identify the Carbonyl compound which will not be formed when hydration of Alkynes is carried out with dil. $\mathrm{H}_2 \mathrm{SO}_4 / \mathrm{Hg}^{2+}$ at 333 K .

Acetone, Butanal, Ethanal, Butanone.

Acetone

Butanone

Butanal

Ethanal

COMEDK 2025 Afternoon Shift

MCQ (Single Correct Answer)

-0

An Alkene " X " on reaction with hot acidified $\mathrm{KMnO}_4$ gave a mixture of Ethanoic acid and Propanone. Identify " X ".

Pent-2-ene

2-Methylbut-2-ene.

But-2-ene

2,3 -Dimethylbut-2-ene

COMEDK 2025 Afternoon Shift

MCQ (Single Correct Answer)

-0

Match the reactions in Column I with the correct products given in Column II

S.No.	Column I	S.NO.	Column II
A.	1- Chloropropane $+(\mathrm{Zn} / \mathrm{HCl}) \rightarrow$	P.	Propanone + Methanal
B.	n- Hexane $+\left(\right.$ anh. $\left.\mathrm{AlCl}_3 / \mathrm{HCl}_{(\mathrm{g})}\right) \rightarrow$	Q.	Propanone
C.	2- Methylpropene $+\left(\mathrm{O}_3 \& \mathrm{Zn} / \mathrm{H}_2 \mathrm{O}\right) \rightarrow$	R.	Propane
D.	Propyne $+\left(\mathrm{HgSO}_4 / \mathrm{H}_2 \mathrm{SO}_4\right.$ at 333 K$) \rightarrow$	S.	2-Methylpentane + 3-Methylpentane

$A-R \quad B-S \quad C-P \quad D-Q$

$A-S \quad B-R \quad C-Q \quad D-P$

$A-P \quad B-S \quad C-R \quad D-Q$

$A-Q \quad B-P \quad C-S \quad D-R$

COMEDK 2025 Afternoon Shift

MCQ (Single Correct Answer)

-0

When one mole of a hydrocarbon $\mathbf{C}_{\mathbf{a}} \mathbf{H}_{\mathbf{b}}$ undergoes complete combustion, it requires 7.5 moles of $\mathrm{O}_2$ and results in the production of 6 moles of $\mathrm{CO}_2$. Calculate the values of $\mathbf{a}$ and $\mathbf{b}$.

$a=4$ and $b=10$

$a=6$ and $b=6$

$a=6$ and $b=12$

$a=4$ and $b=8$

PREVIOUS NEXT

COMEDK Subjects

Browse all chapters by subject

Chemistry

Physical Chemistry

Some Basic Concepts of Chemistry Atomic Structure States of Matter Thermodynamics Chemical Equilibrium Ionic Equilibrium Liquid Solution Redox Reactions Surface Chemistry Solid State Electrochemistry Chemical Kinetics Nuclear Chemistry

Inorganic Chemistry

Metallurgy Periodic Table and Periodicity Hydrogen and It's Compounds p-Block Elements Environmental Chemistry Coordination Compounds d and f Block Elements s-Block Elements Chemical Bonding and Molecular Structure

Organic Chemistry

IUPAC Nomenclatures General Organic Chemistry Isomerism Hydrocarbons Haloalkanes and Haloarenes Alcohol, Phenols and Ethers Aldehyde and Ketone Carboxylic Acids and Its Derivatives Compounds Containing Nitrogen Polymers Biomolecules Chemistry in Everyday Life Practical Organic Chemistry