Q. An ideal gas occupies an unknown volume V liters (L) at a pressure of 12 atm. The gas is expanded isothermally against a constant external pressure of 2 atm so that its final volume becomes 3 L. The work involved for this expansion process is______cal. (Round off to two decimal places) (Gas ...

Q. On heating a sample of 25 mg hydrated compound (molecular weight = 250 g/mol) in thermogravimetric analysis, 16 mg of dehydrated compound remains. The number of water molecules lost per molecule of hydrated compound is                                                                             ...

Q. The number of 1H NMR signals observed for the following compound is Ans: The number of 1H NMR signals observed for the following compound is 6 Solution: Enantiotropic protons are protons that are replaced by another group of protons. They have the same mirror image and chemical ...

Q. The number of following diene(s) that undergo Diels-Alder reaction with methyl acrylate is Ans: The number of following diene(s) that undergo Diels-Alder reaction with methyl acrylate is 5 Solution: Diels- Alder Reaction is a  pericyclic chemical reaction between substituted ...

Q. Among the following compounds, the number of compounds that DO NOT exhibit optical activity at room temperature is Ans: 4 ​Among the following compounds, the number of compounds that DO NOT exhibit optical activity at room temperature is 4.

Q. In the following reaction, the stereochemistry of the major product is predicted by the (A) Cram’s model (B) Cram’s chelation model (C) Felkin model (D) Felkin-Anh model Ans: Cram’s chelation model

Q. The Woodward-Hoffmann condition to bring out the following transformation is (A) ∆, conrotatory (B) ∆, disrotatory (C) hν, disrotatory (D) hν, conrotatory Ans: hν, conrotatory

Q. Consider the following phase diagram of CO2 (not to scale). At equilibrium, the INCORRECT statement is: A. At 200 K, on increasing the pressure from 1 to 50 atm, CO2 gas condenses to liquid. B. It is not possible to obtain liquid CO2 from gaseous CO2 below 5.11 atm. C. Both liquid ...

Q. Micelle formation is accompanied by the (A) decrease in overall entropy due to ordering. (B) increase in overall entropy mostly due to increase in solvent entropy. (C) increase in overall entropy mostly due to increase in solute entropy. (D) increase in overall entropy and decrease ...

Q. The Do value of 2+ is 8500 cm–1. The Do values for 4– and 2+ compared to 2+ are (A) higher and lower, respectively. (B) lower and higher, respectively. (C) higher in both complex ions. (D) lower in both complex ions. Ans: lower and higher, respectively.

Q. Among the following carbon allotropes, the one with discrete molecular structure is (A) Diamond (B) a-Graphite (C) b-Graphite (D) Fullerene Ans: Fullerene Solution: Allotropes of carbon like Diamond, Graphite, and Fullerene show crystalline structures. Fullerene has ...

Q. The INCORRECT statement about the interhalogen compound ICl3 is: (A) It exists as a dimer. (B) Geometry around the iodine is tetrahedral in solid-state. (C) It decomposes as ICl and Cl2 in gas-phase. (D) Liquid ICl3 conducts electricity. Ans: Geometry around the iodine is ...