COMEDK 2024 Afternoon Shift

Arrange the following compounds in the decreasing order of their acidic strength.
(I) m-cresol
(II) Phenol
(III) m-aminophenol
(IV) m-methoxyphenol

Which of the following compound cannot be prepared by Williamson's synthesis?

Which of the following tests may be used to distinguish between phenol and cyclohexanol?

The major product '\(\mathrm{X}\)' of the following reaction is

Which of the following compounds undergo Aldol condensation followed by dehydration to give 3-phenylprop-2-en-1-al?

Predict the final major product 'S' of the following reaction

The correct sequence of filling of electrons in \(n=6\) is:

The ratio of the first three radii of Bohr's atom is:

With reference to vitamins and its deficiency diseases, the correct statements are:
(i) Cheilosis is due to the deficiency of Riboflavin
(ii) The deficiency of Vitamin B6 causes pernicious anaemia
(iii) Osteomalacia is due to the deficiency...

Which of the following statement is not true about glucose?

Among the following peptides, identify the pair where the name and its structure are correctly matched.

Among the following compounds, the most acidic is :

In a set of reactions, bromoethane yielded a final product 'S'.

The compound 'S' should be

4-methyl benzamide (A) on reaction with ethanolic solution of \(\mathrm{KOH}\) and bromine gives another compound (B). The compound (B) on treatment with benzoyl chloride gives compound (C). Identify the correct structure of compound (C) fr...

The bond dissociation enthalpy of the species in their correct order is:

\(\text { From the following pair of compounds, identify the incorrect pair in terms of the covalent character. }\)

In the following question a statement of Assertion (A) followed by a statement of Reason (R) is given. Choose the correct option out of the choices given below.
Assertion (A): A molecule of \(\mathrm{SF}_4\) is see-saw shaped, while that of...

\(\mathrm{S}_8\) on heating at a temperature above \(1000 \mathrm{~K}\), changes to \(\mathrm{S}_2\). When 1 mole of \(\mathrm{S}_8\) is heated above \(1000 \mathrm{~K}\), the pressure falls by \(32 \%\) at equilibrium. The equilibrium cons...

Given below a first order reaction in the gas phase
\(\mathrm{A}(\mathrm{g}) \rightarrow \mathrm{B}(\mathrm{g})+\mathrm{C}(\mathrm{g})\)
If the initial pressure of the system is \(\mathrm{P}_{\mathrm{i}}\) and the total pressure at $$\mathr...

The temperature \((\mathrm{T})\) and rate constant \((\mathrm{k})\) for a first order reaction \(\mathrm{R} \rightarrow \mathrm{P}\), was found to follow the equation \(\log \mathrm{k}=-(2000) \frac{1}{\mathrm{~T}}+8.0\). The pre-exponentia...

For the reaction, \(\mathrm{A}+3 \mathrm{~B} \rightarrow 2 \mathrm{C}+\mathrm{D}\), the concentration of \(\mathrm{A}\) changes from 0.0150 to 0.0125 in 1 minute. The rate of formation of \(\mathrm{C}\) in $$\mathrm{mol} \mathrm{~L}^{-1} \m...

The rate of appearance of bromine is related to the disappearance of bromide ion in the equation given below is:
$$\mathrm{BrO}_3^{-} \text {(aq) }+5 \mathrm{Br}^{-} \text {(aq) }+6 \mathrm{H}^{+} \rightarrow 3 \mathrm{Br}_2(\mathrm{l})+3 \...

The half-life for a zero order reaction is

An organic compound with molecular formula \(\mathrm{C}_3 \mathrm{H}_5 \mathrm{N}\) on hydrolysis gives compound '\(\mathrm{X}\)' which on treatment with \(\mathrm{Cl}_2 / \mathrm{P}\) gives compound '\(\mathrm{Y}\)'. Compound '$$\mathrm{Y}...

Arrange the following amines in the decreasing order of their solubilities in water.

On the basis of crystal field theory, electronic configuration of a low spin \(\mathrm{d}^4\) complex is:

The type of hybridisation and the spin only magnetic moment for the complex \([\mathrm{Ni}(\mathrm{CO})_4]\) are respectively:

The molar conductivity of the complex \(\mathrm{CoCl}_3 \cdot 4 \mathrm{NH}_3 \cdot 2 \mathrm{H}_2 \mathrm{O}\) is found to be the same as that of a \(1: 3\) electrolyte. The structural formula of the compound is :

Consider the following statements in respect of lanthanides, which of the statements are incorrect?
(i) \(\mathrm{La}(\mathrm{OH})_3\) is least basic among the hydroxides of lanthanides
(ii) The lanthanide ions $$\mathrm{Yb}^{2+}, \mathrm{L...

The correct order of increasing melting point is

The metallic ions that have almost same spin only magnetic moment are :
(i) \(\mathrm{Co}^{2+}\)
(ii) \(\mathrm{Mn}^{2+}\)
(iii) \(\mathrm{Cr}^{2+}\)
(iv) \(\mathrm{Cr}^{3+}\)

The limiting molar conductivity of \(\mathrm{NH}_4 \mathrm{OH}\) is \(238 \mathrm{~S} \mathrm{~cm}^2 \mathrm{~mol}^{-1}\). At \(25^{\circ} \mathrm{C}\), molar conductance of \(0.1 \mathrm{M}\) aqueous solution of ammonium hydroxide is $$9.5...

Identify the incorrect statement among the following.

\(\mathrm{Cu}^{+}\) undergoes disproportionation, according to the equation,
\(2 \mathrm{Cu}^{+} \rightleftharpoons \mathrm{Cu}^{2+}+\mathrm{Cu}\)
The \(\mathrm{E}^{\circ}\) value for the reaction is:
$$[\mathrm{E}_{\mathrm{Cu}^{2+} / \ma...

The \(\mathrm{E}^{\circ}\) values of \(\mathrm{A} . \mathrm{B}\) and \(\mathrm{C}\) are given. Which element/(s) is/(are) good for coating the surface of iron to prevent corrosion?
Given: $$[\mathrm{E}_{\mathrm{Fe}^{2+} / \mathrm{Fe}}^0=-0....

When 0.1 mole of \(\mathrm{MnO}_4{ }^{2-}\) is oxidised, the quantity of electricity required to completely oxidise \(\mathrm{MnO}_4{ }^{2-}\) to \(\mathrm{MnO}_4^{-}\) is

Which of the following carbanions is the least stable?

Which of the following is not aromatic?

Arrange the following in the order of increasing reactivity towards \(\mathrm{SN}_{\mathrm{2}}\) reactions.
$$\begin{array}{ll}
\left(\mathrm{CH}_3\right)_3 \mathrm{CCH}_2 \mathrm{Br}(\mathrm{P}) ; & \\\mathrm{CH}_3\left(\mathrm{CH}_2\right...

Choose the incorrect statement from the following.

Consider the following reaction
\((\mathrm{CH}_3)_2 \mathrm{CHCH}_2 \mathrm{Br}+(\mathrm{CH}_3)_3 \mathrm{CCH}_2 \mathrm{Br} \xrightarrow[\Delta]{\mathrm{Na} \text { /dry ether }} \mathrm{X}+\mathrm{Y}+\mathrm{Z}\)
Identify the product whic...

Arrange the following compounds in the decreasing order of reactivity towards electrophilic substitution reaction.
(I) Chlorobenzene
(II) Nitrobenzene
(III) Benzene
(IV) Isopropylbenzene

The major product obtained in the following reaction is :

Which of the following reactions is an example for incomplete combustion?

\(1 \mathrm{~cm}^3 \text { of } 0.01 \mathrm{~M} \mathrm{~HCl} \text { is added to } 1 \mathrm{~L} \text { of } \mathrm{NaCl} \text { solution. The } \mathrm{pH} \text { of the resulting solution is: }\)

Which of the following compounds will show geometrical isomerism?

Names of some organic compounds are given. Which one is not in IUPAC system?

A solution of \(\mathrm{KCl}(\mathrm{M}=74.5 \mathrm{~g} \mathrm{~mol}^{-1})\) containing \(1.9 \mathrm{~g}\) per \(100 \mathrm{~mL}\) of \(\mathrm{KCl}\) is isotonic with a solution of urea $$(\mathrm{M}=60.0 \mathrm{~g} \mathrm{~mol}^{-1}...

An aqueous solution of glucose boils at \(100.01^{\circ} \mathrm{C}\). The number of glucose molecules in a solution containing \(100 \mathrm{~g}\) of water is _________ [\(\mathrm{K}_{\mathrm{b}}\) for water is $$0.5 \mathrm{~K} \mathrm{~k...

Which among the following compounds has the highest freezing point of its 1 molal aqueous solution?