Identify the correct formula of oleum from the following

A \(H_2S_2O_7\)
B \(H_2SO_3\)
C \(H_2SO_4\)
D \(H_2S_2O_8\)

Verified Solution

Answer & Solution

Correct Answer

(A) \(H_2S_2O_7\)

Step-by-step Solution

Detailed explanation

Oleum \(\to\) pyrosulphuric acid (\(H_2S_2O_7\))

Apply the relevant identity from the chapter and substitute the values established in the previous step, keeping the original constraint in view.

Use the simplified expression to isolate the unknown, then plug the result back into the question setup to confirm the working is internally consistent.

Cross-check against a boundary or limiting case. Both the dimensional balance and the qualitative behaviour at the extreme should agree with the candidate answer.

Combine the steps above to identify the correct option. The remaining choices each fail at least one of the consistency, dimensional, or boundary checks.

Same subject

Match List \(- I\) with List \(- II.\)

List \(- I\) (Products formed)	List \(- II\) (Reaction of carbonyl compound with)
\((a)\) Cyanohydrin	\((i)\) \(NH _{2} OH\)
\((b)\) Acetal	\((ii)\) \(RNH _{2}\)
\((c)\) Schiff's base	\((iii)\) alcohol
\((d)\) Oxime	\((iv)\) \(HCN\)

Choose the correct answer from the options given below:

NEET 2022 Medium

Explore more questions on app

From NEET

After maturation, in primary lymphoid organs, the lymphocytes migrate for interaction with antigens to secondary lymphoid organ(s) / tissue(s) like :
A. thymus
B. bone marrow
C. spleen
D. lymph nodes
E. Peyer's patches

Choose the correct answer from the options given below

NEET 2025 Easy

Match Column \(- I\) and Column \(- II\) and choose the correct match from the given choices.

Column \(- I\)	Column \(- II\)
\((A)\) Root mean square speed of gas molecules	\((P)\) \(\frac{1}{3} \mathrm{n} m \bar{v}^{2}\)
\((B)\) Pressure exerted by ideal gas	\((Q)\) \(\sqrt{\frac{3 \mathrm{RT}}{\mathrm{M}}}\)
\((C)\) Average kinetic energy of a molecule	\((R)\) \(\frac{5}{2} \mathrm{RT}\)
\((D)\) Total internal energy of \(1\) mole of a diatomic gas	\((S)\) \(\frac{3}{2} \mathrm{k}_{\mathrm{B}} \mathrm{T}\)

NEET 2021 Medium

The specific receptors for neurotransmitters in a synapse are present on :

NEET 2026 Medium

Match List \(I\) with List \(II\) :

List \(I\) (Sub Phases of Prophase \(I\))	List \(II\)
(A) Diakinesis	(I) Synaptonemal complex formation
(B) Pachytene	(II) Completion of terminalisation of chiasmata
(C) Zygotene	(III) Chromosomes look like thin threads
(D) Leptotene	(IV) Appearance of recombination nodules

Choose the correct answer from the options given below

NEET 2024 Medium

Explore more questions on app