List of top Chemistry Questions asked in CUET (UG)

In the Etard reaction, the final product is
Although chlorine is electron-withdrawing, it is ortho- and para-directing in electrophilic substitution because • (A) Chlorine withdraws electrons through inductive effect.
(B) Chlorine destabilizes the intermediate carbocation formed during electrophilic sub-stitution.
(C) Chlorine accepts electrons through resonance
(D) Chlorine releases electrons through resonance.
Choose the correct answer from the options given below:
Aniline does not undergo Friedel-Crafts reaction because 1.(A) It forms salt with the Lewis acid catalyst, AlCl3.
2. (B) Nitrogen of aniline acquires negative charge.
3. (C) Nitrogen of aniline acquires positive charge.
4. (D) Nitrogen acts as a strong deactivating group in the further reaction.
In the reaction, (CH3)3C − O − CH3 + HI → Products, CH3OH and (CH3)3CCl are the products and not CH3I and (CH3)3COH. It is because
Formaldehyde undergoes Cannizzaro reaction because
(A) It has alpha-hydrogen atom.
(B) It does not have alpha-hydrogen atom.
(C) It does not undergo self-oxidation and reduction on heating with concentrated alkali.
(D) It undergoes self-oxidation and reduction on heating with concentrated alkali.
The Gattermann-Koch reaction is used in the industrial preparation of benzaldehyde. The electrophile involved in this reaction is
In the following compounds, what is the increasing order of their reactivity towards nucleophilic addition reactions?
Arrange the following acids in increasing order of their acidic strengths: HCOOH, FCH₂COOH, NO₂CH₂COOH, ClCH₂COOH
Which of the following compounds will give the Hell-Volhard-Zelinsky reaction?
What will be the increasing order of basic strength of the following compounds: \(\text{C}_2\text{H}_5\text{NH}_2, (\text{C}_2\text{H}_5)_2\text{NH},(\text{C}_2\text{H}_5)_3\text{N},\text{C}_6\text{H}_5\text{NH}_2\)
The gold number range of some lyophilic colloids is given below: A: 0.005–0.01, B: 0.15–0.25, C: 0.04–1.0, D: 15–25
In the following reaction, identify the product D.
chemical reaction
The correct order of increasing boiling points of the following compounds is: Pentan-1-ol, n-Butane, Pentanal, Ethoxyethane
The spin-only magnetic moment of Hexacyanomanganate(II) ion is.........BM
Which of the following compounds will be repelled when placed in an external magnetic field?
If 75$\%$ of a first-order reaction gets completed in 32 minutes, the time taken for 50$\%$ completion of this reaction is:
The Cu metal crystallises into fcc lattice with a unit cell edge length of 361 pm. The radius of Cu atom is:
Arrange the following in decreasing order of the number of molecules contained in: (A) 16 g of O$_2$, (B) 16 g of CO$_2$, (C) 16 g of CO, (D) 16 g of H$_2$
The total number of ions produced from the compound \(\text{Cr}(\text{NH}_3)_6]\text{Cl}_3\) in aqueous solution is:
The correct structure of dipeptide, Gly-Ala (glycyl alanine) is:
The oxidation number of Co in complex [Co(H$_2$NCH$_2$CHNH$_2$)$_3$]$_2$(SO$_4$)$_3$ is:
A molecule X associates in a given solvent as per the following equation:
X ⇌ (X)n
For a given concentration of X, the van’t Hoff factor was found to be 0.80 and the
fraction of associated molecules was 0.3. The correct value of ‘n’ is:
For a complex reaction, the order of reaction is equal to:
Identify the order of reaction if the rate constant is k=2×10−2s−1:
In the electrolysis of alumina to obtain aluminium metal, cryolite is added mainly to: