List of top Organic Chemistry Questions asked in GATE CY

The quantity of the cobalt ore [Co\(_3\)(AsO\(_4\))\(_2\)\( \cdot \) H\(_2\)O] required to obtain 1 kg of cobalt (rounded off to two decimal places) is \(\underline{\hspace{2cm}}\) kg.
Given: Atomic Wt. of Co = 59, As = 75, O = 16, H = 1.
The reaction
\[ \text{CO} (g) + \text{Cl}_2 (g) \rightleftharpoons \text{COCl}_2 (g) \] at 500 °C, with initial pressures of 0.7 bar of CO and 1.0 bar of Cl_2, is allowed to reach equilibrium. The partial pressure of COCl_2 (g) at equilibrium is 0.15 bar. The equilibrium constant for this reaction at 500 °C (rounded off to two decimal places) is \(\underline{\hspace{2cm}}\).
The fundamental vibrational frequency of \( ^1H^{127}I \) is 2309 cm\(^{-1}\). The force constant for this molecule (rounded off to the nearest integer) is \(\underline{\hspace{2cm}}\) N m\(^{-1}\).
Given: \( N = 6.022 \times 10^{23}, c = 3.0 \times 10^8 \, \text{m s}^{-1} \).
Given the initial weight of 1 mg of radioactive \( ^{60} \)Co (half-life = 5.27 years), the amount disintegrated in 1 year (rounded off to two decimal places) is \(\underline{\hspace{2cm}}\) mg.
The correct statement(s) about the concentration of Na\(^+\) and K\(^+\) ions in animal cells is/are:
Hexane and heptane are completely miscible. At 25°C, the vapor pressures of hexane and heptane are 0.198 atm and 0.06 atm, respectively. The mole fractions of hexane and heptane in the vapor phase for a solution containing 4 M hexane and 6 M heptane, respectively, are:
In an electrochemical cell, Ag\(^+\) ions in AgNO\(_3\) are reduced to Ag metal at the cathode and Cu is oxidized to Cu\(^{2+}\) at the anode. A current of 0.7 A is passed through the cell for 10 min. The mass (in grams) of silver deposited and copper dissolved, respectively, are:
The shapes of the compounds ClF\(_3\), XeOF\(_2\), N\(_3^-\) and XeO\(_3\)F\(_2\) respectively, are:
The change in enthalpy (\( \Delta H \)) for the reaction
\[ 2 \, P (s) + 3 \, Br_2 (l) \rightarrow 2 \, PBr_3 (l) \] is -243 kJ. In this reaction, if the amount of phosphorus consumed is 3.1 g, the change in enthalpy (rounded off to two decimal places) is \(\underline{\hspace{2cm}}\) kJ.
A reversible heat engine absorbs 20 kJ of heat from a source at 500 K and dissipates it to the reservoir at 400 K. The efficiency of the heat engine is \(\underline{\hspace{2cm}}\) %.
Acceptable wavefunctions for a quantum particle must be:
A correct example of a nucleotide is:
An organic compound exhibits the [M]+, [M+2]+, and [M+4]+ peaks in the intensity ratio 1:2:1 in the mass spectrum, and shows a singlet at \( \delta \) 7.49 in the \( ^1H \) NMR spectrum in CDCl\(_3\). The compound is: