Practice free NEET NEET multiple-choice questions online with instant answers and detailed explanations. No login required.
Some tranquilizers are listed below. Which one from the following belongs to barbiturates?
Veronal (barbital) is a barbituric-acid derivative.
The given compound $\text{C}_6\text{H}_5\!-\!\text{CH}\!=\!\text{CH}\!-\!\text{CH}(X)\!-\!\text{CH}_2\text{CH}_3$ is an example of _____.
X is on the sp³ carbon adjacent to a C=C → allylic halide.
Intermolecular forces are forces of attraction and repulsion between interacting particles that will include:
A. dipole–dipole forces B. dipole–induced dipole forces C. hydrogen bonding D. covalent bonding E. dispersion forces
Choose the most appropriate answer:
Covalent bonding is intra-molecular, not intermolecular.
Which one is an example of heterogeneous catalysis?
Haber process — gases over solid Fe catalyst — is heterogeneous.
A: Helium is used to dilute oxygen in diving apparatus. R: Helium has high solubility in O₂.
A correct. R wrong — He is used because of its LOW solubility in blood at high pressure, not high solubility in O₂.
The stability of Cu²⁺ is more than Cu⁺ salts in aqueous solution due to:
Cu²⁺ has very large hydration enthalpy that overcompensates the higher 2nd IE.
Consider the following reaction and identify the product (P).
$$\text{(CH}_3)_2\text{CH-CH(OH)-CH}_3 \xrightarrow{\text{HBr}} \text{Product (P)}$$
(starting material: 3-methylbutan-2-ol)
$S_N1$: 2° carbocation rearranges by 1,2-H shift to a 3° carbocation; Br⁻ attacks the more stable cation → 2-bromo-2-methylbutane.
Complete the following reaction:
$$\text{Cyclohexanone (A)} \xrightarrow{\text{HCN}} \text{cyanohydrin (B)} \xrightarrow[\Delta]{\text{conc. H}_2\text{SO}_4} \text{[C]}$$
[C] is:
Conc. H₂SO₄/Δ hydrolyses the –CN to –COOH and dehydrates the adjacent –OH → α,β-unsaturated acid (cyclohexene-1-carboxylic acid).
A: In equation $\Delta_r G = -nFE_{cell}$, the value of $\Delta_r G$ depends on $n$. R: $E_{cell}$ is an intensive property and $\Delta_r G$ is an extensive property.
Both true. R is a true fact but does not directly justify A (which follows from the explicit $n$ in $-nFE$).
In Lassaigne’s extract of an organic compound, both nitrogen and sulphur are present, which gives blood red colour with Fe³⁺ due to the formation of:
When N + S coexist, NaSCN forms and reacts with Fe³⁺ → blood-red $[\text{Fe(SCN)}]^{2+}$.
Ready to ace NEET?
Free access · No credit card required
Yes. You can attempt every NEET question on this page for free without logging in, and check the correct answer with a detailed explanation instantly.
No account is required to attempt questions and view answers. A free account adds bookmarks, personal notes, and progress tracking.
The bank mixes NEET previous year questions (PYQs) with practice questions, each tagged with its exam appearances where applicable.