List of top Questions asked in UP Board XII

Explain the acidic nature of phenol.
In which of the following compounds, oxidation number of Mn is +6?
Which of the following ligands can act as an ambidentate ligand?
Which of the following gives isocyanide test?
In nucleic acids, the nucleotides are linked together by
The colligative property is
Effect of temperature on rate of reaction and calculation of time for 80\% completion.
Explain the mechanism of dehydration of ethanol.
Explain the difference between aldehydes and ketones by Fehling solution and Schiff reagent.
Explain ionisation isomerism and linkage isomerism in coordination compounds with example.
After eliminating salt bridge of any Galvanic cell, voltage of the cell:
Four alternatives are given in each part of this question. Write the correct alternative in your answer-book. Fe is:
Write the chemical equations for the preparation of 1-iodobutane from the following: 1-butanol
How does the acidified \( KMnO_4 \) solution react with ferrous sulphate, \( SO_2 \), oxalic acid, and sodium thiosulphate?
Calculate the e.m.f. of the following cell writing the cell reaction: \[ \text{Cu} | \text{Cu}^{2+}(1M) || \text{Ag}^+(1M) | \text{Ag} \] Given: \[ E^0_{\text{Cu}^{2+}/\text{Cu}} = +0.34 \text{ volt}, \quad E^0_{\text{Ag}^+/\text{Ag}} = +0.80 \text{ volt} \]
At 298 K conductivity of 0.20 M KCl solution is 0.0248 S cm\(^{-1}\). Calculate its molar conductivity.
Write the units of velocity and velocity constant for zero order reaction.
Write I.U.P.A.C. names of the following compounds: \( CH_3CH(CH_3)CH_2CH_2CH_2CHO \)
The velocity of a gaseous reaction is halved, whereas the volume of the pot is doubled. Calculate the order of reaction.
For a first-order reaction, prove that the time taken in completion of 3/4 part of the reaction is two times that of its half-life period.
Explain the importance of complex compounds in qualitative analysis with a suitable example.
Among the following, which is more acidic?
Lucas reagent is
Which of the following amines does not give carbylamine reaction?
At 20°C the osmotic pressure of 45 gm per litre solution of a substance is 3.2 atmosphere. Calculate the value of solution constant. The molecular mass of the substance is 342.