List of top Questions asked in UP Board XII

Write the chemical equation for the preparation of Aniline and write the chemical equation of its reaction with the following:
Explain the zero order of reaction by giving examples.
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 molecularity of reaction with example.
Fehling’s solution is used to identify which type of compounds? Write chemical equations.
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.
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 the chemical equation for the preparation of phenol.
\(pK_b\) value of aniline is more in comparison to that of methyl amine. State the reason.
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.
Explain the redox potential.
A colourless ion in the following is
The oxidation number of Cu in the ion [Cu(CN)$_4$]$^{3-}$ is
Rosenmund reduction gives
How many primary amines are possible for the formula C$_4$H$_{11}$N?
How many primary alcoholic groups are there in glucose?
5.85 g of NaCl is dissolved in 200 ml water. Calculate the molarity of the solution. [Na = 23, Cl = 35.5]
In comparison to Mn\(^ {3+}\) ions Mn\(^ {2+}\) ions are more stable. Why?
Describe the different components of the current account in the balance of payments.
Explain the 'Law of Equi-Marginal Utility' in the analysis of consumer’s equilibrium.
What do you understand by Demand? Describe the determinants of Demand.
Explain the 'Laws of Return to Scale' with diagram.