List of top Chemistry Questions asked in UP Board XII

The colligative property is
Effect of temperature on rate of reaction and calculation of time for 80\% completion.
Explain the difference between aldehydes and ketones by Fehling solution and Schiff reagent.
Explain the mechanism of dehydration of ethanol.
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: \[ E^0_{\text{Cu}^{2+}/\text{Cu}} = +0.34 \text{ volt}, \quad E^0_{\text{Ag}^+/\text{Ag}} = +0.80 \text{ volt} \]
Explain the importance of complex compounds in qualitative analysis with a suitable example.
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.
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.
Write I.U.P.A.C. names of the following compounds: \( CH_3CH(CH_3)CH_2CH_2CH_2CHO \)
Among the following, which is more acidic?
Lucas reagent is
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.
Which of the following amines does not give carbylamine reaction?
Four alternatives are given in each part of this question. Select the correct alternative and write it in your answer-book: Which of the following has lowest osmotic pressure?
Write chemical equation for five reactions of preparation of Amine.
Explain the Crystal Field Theory (CFT) of coordination compounds.
1.26 g of a solid was dissolved in 200 cm\(^3\) aqueous solution. The osmotic pressure of the solution at 300 K was found to be \( 2.57 \times 10^{-3} \) bar. Calculate the molar mass of the solid.
Explain osmotic pressure and establish an expression for finding the molar mass of solute with the help of this.