List of top Chemistry Questions asked in UP Board XII

Write the chemical equation for the preparation of acetaldehyde and write a note on Aldol condensation and cross-Aldol condensation.
Write chemical equations for obtaining carboxylic acid from the following:
Explain the mechanism of the reaction of diethyl ether with HI.
Explain that \([Co(NH_3)_5Cl]SO_4\) and \([Co(NH_3)_5SO_4]Cl\) are of which type of isomers.
Write the color of following metal ions in aqueous solution:
Calculate the electromotive force of the following cell: \[ \text{Cu} | \text{Cu}^{2+} (1M) || \text{Ag}^{+} (1M) | \text{Ag} \] Given \( E^\circ_{\text{Cu}^{2+}/\text{Cu}} = +0.34V \), \( E^\circ_{\text{Ag}^{+}/\text{Ag}} = +0.80V \)
Explain the zero order of reaction by giving examples.
Explain the molecularity of reaction with example.
Fehling’s solution is used to identify which type of compounds? Write chemical equations.
Explain the redox potential.
\(pK_b\) value of aniline is more in comparison to that of methyl amine. State the reason.
Differentiate between double salt and complex salt by giving two examples of each.
Write the equation of any one of nucleophilic substitution reactions of ethyl bromide.
Write the chemical equation for the preparation of phenol.
At what temperature does a 5% (w/v) solution of glucose produce 7 atmospheric osmotic pressure? \([ R = 0.0821 \, \text{L} \cdot \text{atm} / \text{K mol} ]\)
Write a note on Tollen’s test.
Which one between 0.1 M Urea and 0.1 M NaCl solution will have greater osmotic pressure? Explain the reason.
How many primary amines are possible for the formula C$_4$H$_{11}$N?
In comparison to Mn\(^ {3+}\) ions Mn\(^ {2+}\) ions are more stable. Why?
The oxidation number of Cu in the ion [Cu(CN)$_4$]$^{3-}$ is
5.85 g of NaCl is dissolved in 200 ml water. Calculate the molarity of the solution. [Na = 23, Cl = 35.5]
How many primary alcoholic groups are there in glucose?
A colourless ion in the following is
Rosenmund reduction gives
The aqueous solution having maximum boiling point is