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
In the following reaction, the stereochemistry of the major product is predicted by the Read More »
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
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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 and gas
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 in enthalpy. Ans: increase in overall entropy mostly due
![The Do value of [Ni(H2O)6]2+ is 8500 cm–1. The Do values for [NiCl6]4– and [Ni(NH3)6]2+ compared to [Ni(H2O)6]2+ are](https://www.gkseries.com/blog/wp-content/uploads/2023/08/The-Do-value-of-NiH2O62-is-8500-cm–1.-The-Do-values-for-NiCl64–-and-NiNH362-compared-to-NiH2O62-are-1024x536.jpg)
Q. The Do value of [Ni(H2O)6]2+ is 8500 cm–1. The Do values for [NiCl6]4– and [Ni(NH3)6]2+ compared to [Ni(H2O)6]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 infinite lattices of Diamond and Graphite. It is formed by nanotubes forming the discrete molecular structure.
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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 tetrahedral in solid-state. Solution: Geometry around the iodine is tetrahedral
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Q. The INCORRECT statement about the solid-state structure of CsCl and CaF2 is: (A) Cations in both solids exhibit coordination number 8. (B) CsCl has bcc type structure and CaF2 has cubic close pack structure. (C) Radius ratio for Cs/Cl and Ca/F is 0.93 and 0.73, respectively. (D) Both exhibit close pack structure. Ans: Both
The INCORRECT statement about the solid-state structure of CsCl and CaF2 is Read More »
Q. M and N had four children P, Q, R and S. Of them, only P and R were married. They had children X and Y respectively. If Y is a legitimate child of W, which one of the following statements is necessarily FALSE? (A) M is the grandmother of Y (B) R is the
Q. A firm hires employees at five different skill levels P, Q, R, S, T. The shares of employment at these skill levels of total employment in 2010 is given in the pie chart as shown. There were a total of 600 employees in 2010 and the total employment increased by 15% from 2010 to
