BITSAT 2025

The major product of the reaction between $\mathrm{CH}_3 \mathrm{CH}_2 \mathrm{ONa}$ and $\left(\mathrm{CH}_3\right)_3 \mathrm{CCl}$ in ethanol is

Identify the compound that undergoes self-aldol condensation in the presence of cold dilute alkali, forming a $\beta$-hydroxy aldehyde:

\(\text { The major product formed in the given reaction is }\)

\(\text { The product } X \text { and } Y \text { respectively are }\)

The degeneracy of a hydrogen atom whose energy equals $-R_{\mathrm{H}}$ / 16

If the de-Broglie wavelength of a particle is equal to $10 \sqrt{h / m}$, then what is the ratio of its speed to mass?

Angular stomatitis and cracked lips are caused by deficiency of

A tetrapeptide is formed from four amino acids: alanine, serine, glycine, and valine. The C-terminal is fixed as alanine, and the N-terminal amino acid is chiral. Determine the number of possible sequences.

The central atom shows $d$-orbital participation in hybridisation in

For the reaction,
\(2 \mathrm{SO}_2+\mathrm{O}_2 \rightleftharpoons 2 \mathrm{SO}_3\)
if the rate of disappearance of $\mathrm{O}_2$ is $2 \times 10^{-4} \mathrm{~mol} \mathrm{~L}^{-1} \mathrm{~s}^{-1}$, determine the rate of appearance o...

If for a first-order reaction, the frequency factor $A=4 \times 10^{13} \mathrm{~s}^{-1}$ and activation energy $E_a=98.6 \mathrm{~kJ} \mathrm{~mol}^{-1}$, at what temperature will the half-life be 10 minutes?

\(\text { The product } Z \text { formed in the given reaction is }\)

Match List-I with List-II for oxidation number of central metal atom.
$$ \begin{array}{llcc} \hline \begin{array}{c} \text { List-I } \\ (\text { Complex }) \end{array} & & \begin{array}{c} \text { List-II } \\ \text { (Oxidation number) }...

The hybridisation and geometry of the complex $\left[\mathrm{Ni}(\mathrm{CN})_4\right]^{2-}$ are

Among the following transition metal ions, how many have the same number of unpaired electrons, and thus approximately the same magnetic moment?
(i) $\mathrm{Cr}^{3+}$
(ii) $\mathrm{Fe}^{3+}$
(iii) $\mathrm{Mn}^{2+}$
(iv) $\mathrm{Co}^{2+}$...

The $\mathrm{Fe}^{3+}$ ion, having five unpaired electrons, shows a spin-only magnetic moment closest to

A current of 4.0 A is passed through 0.5 L of 0.2 M NaCl solution for 1200 s . Calculate the pH of the solution after electrolysis.

The approximate time duration in hours to electroplate 20 g of calcium from molten calcium chloride using a current of 4 A is (Atomic mass of $\mathrm{Ca}=40$ )

Intramolecular hydrogen bonding is predominantly observed in

Among aqueous 1 N solutions, the pH of HCl , $\mathrm{HNO}_2$ and $\mathrm{CH}_3 \mathrm{COOH}$ follows the order

30 mL of 0.1 M acetic acid is mixed with 60 mL of 0.1 M sodium acetate. If $K_a=1.8 \times 10^{-5}$ what will be the pH of the solution?

How many geometrical (cis-trans) isomers are possible for the compound?
\(\mathrm{CH}_3-\mathrm{CH}=\mathrm{CH}-\mathrm{CH}=\mathrm{CH}_2\)

A 1 molar aqueous solution of magnesium nitrate is $40 \%$ dissociated at 298 K . Calculate the osmotic pressure of the solution. $\left(R=0.0821 \mathrm{~L} \mathrm{~atm} \mathrm{~mol}^{-1} \mathrm{~K}^{-1}\right)$

0.1 m of urea and 0.05 m of $\mathrm{CaCl}_2$ are dissolved separately in equal volumes of water. Which solution will have higher elevation in boiling point?

Electron affinity is maximum when

The ionic radii of $\mathrm{N}^{3-}, \mathrm{O}^{2-}$ and $\mathrm{F}^{-}$follow the trend

Balance the following redox reaction in acidic medium and determine the stoichiometric coefficient of $\mathrm{H}_2 \mathrm{O}$ in the final balanced equation.
$$ \mathrm{MnO}_4^{-}(a q)+\mathrm{Fe}^{2+}(a q) \longrightarrow \mathrm{Mn}^{2+...

Calculate the volume of $M / 10 \mathrm{KMnO}_4$ needed to react with 20 mL of $M / 2 \mathrm{FeSO}_4$ in acidic medium.

The bond dissociation energies of $A_2, B_2$ and $A B$ are in the ratio $1: 4: 2$. If $\Delta H$ for formation of $A B$ from $A_2$ and $B_2$ is $-100 \mathrm{~kJ} / \mathrm{mol}$, calculate the bond dissociation energy of $B_2$.

In a cyclic $p V$ process forming $A$ square loop from $(p=1 \mathrm{~atm}, V=2 \mathrm{~L})$ to $(p=3 \mathrm{~atm}$, $V=4 \mathrm{~L})$, Then, the net heat absorbed by the gas is