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How many equivalents of CH₃MgBr are required to make 2-methylpropan-2-ol from ethyl ethanoate?

Solution:Answer:2... View Article

Determine the number of nitrogen atoms in a semicarbazide.

a. 2b. 3c. 4d. NoneSolution:Answer: (b)Semicarbazide has 3 nitrogen atoms.... View Article

Which of the following will form superoxide?

a. Kb. Nac. Mgd. CaSolution:Answer:(a)From group 1 elements, K, Rb, Cs can form Superoxide (MO2). Na cannot form superoxide, it can form... View Article

Which of the following is incorrect – chemistry problem

Question: Which of the following is incorrect?a. Amylose is branchedb. Glycogen is also called animal starchc. Starch is made up of... View Article

Ninhydrin test for proteins results in the structure:

Solution:Answer: Ruhemann’s Purple... View Article

Determine the product formed when 2,2-dimethyl-3-bromobutane reacts with ethanol at high temperatures.

a. 2,3-dimethylbut-2-eneb. 3,3-dimethylbut-1-enec. 3-ethoxy-2,2-dimethylbutaned. 2-ethoxy-2,3-dimethylbutaneSolution:Answer:(a)... View Article

A person requires 10000 kJ energy per day and ∆H combustion of glucose is 2700 kJ mol^-1. How many grams of glucose are required by the body in a day?

a. 666.67 gb. 6.67 gc. 66.67 gd. 6666.67 gSolution:Answer:(a)Molar mass of glucose (C6H12O6) = 180 g/molMoles of glucose required per day =... View Article

The correct order of the wavelengths of light absorbed by them is

Question:Three complexes [CoCl(NH3)5]2+ (I), [Co(NH3)5H2O}3+ (II) and [Co(NH3)6}3+ (III)absorb light in the visible region. The correct order of... View Article

250 ml of 0.5 m NaOH is added to 500 mL of 1 M HCl. What is the final concentration of the remaining HCl?

a. 0.1 Mb. 0.5 Mc. 50 Md. 5 MSolution:Answer:(b)Neutralization reaction:NaOH + HCl → Nacl + H2OMillimoles of NaOH = (250 × 0.5) mmol =... View Article

The wave number of the spectral line in the emission spectrum of Hydrogen will be equal to 8/9 times the Rydberg’s constant if the electron jumps from:

a. n = 3 to n = 1b. n = 9 to n = 1c. n = 10 to n = 1d. n = 2 to n = 1Solution:Answer:(a)Wave number N2 = 3... View Article

The number of lone pairs present on the central atom of [latex]I_{3}^{-}[/latex] is

a. 9b. 1c. 6d. 3Solution:Answer:(d) has a linear structure. The number of lone pairs on the central atom is 3.... View Article

The Vapour pressure of pure benzene is 70 torr and that of methylbenzene is 20 torr. If we have an equimolar mixture of the above two components, find the mole fraction of benzene in the vapour phase.

Solution:Answer:7/9... View Article

26 Sep 2021: PIB Summary & Analysis

TABLE OF CONTENTS 1. Left-wing Extremism (LWE) 2. Military Engineer Services Day 1. Left-wing Extremism (LWE) Context: Union Minister of... View Article

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