Which of the following plots is (are) correct for the given reaction?
([P]0 is the initial concentration of P) Answer: A As there is no inversion. Hence should be SN1 → 1st... View Article
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in an experiment m grams of a compound x gas liquid or solid taken in a container is loaded in a balance
a) If X is H2O(l), deflection of the panis upwards. b) If X is K4[Fe(CN)6]( ), deflection of the panis... View Article
An organic compound (C8H10O2) rotates plane-polarized light. It produces pink color with neutral FeCl3 solution. What is the total number of all the possible isomers for this compound?
Answer: 6 DBE (Double bond equivalent) of C8H10O2 is = Number of carbon atoms – (Number of monovalent atoms)/2 +... View Article
The structure of a peptide is given below.
If the absolute values of the net charge of the peptide at pH = 2, pH = 6, and pH... View Article
An acidified solution of potassium chromate was layered with an equal volume of amyl alcohol. When it was shaken after the addition of 1 mL of 3% H2O2, a blue alcohol layer was obtained. The blue color is due to the formation of a chromium (VI) compound ‘X’. What is the number of oxygen atoms bonded to chromium through only single bonds in a molecule of X
Answer: 4 Blue colour compound of ‘Cr’ is CrO5. Oxygen atoms bonded to chromium through only single bonds = 4
In the chemical reaction between stoichiometric quantities of KMnO4 and KI in weakly basic solution, what is the number of moles of I2 released for 4 moles of KMnO4 consumed?
Answer: 6 Chemical reaction of KMnO4 and KI in weakly basic solution is given as Equivalents of KMnO4= Equivalents of... View Article
Consider the following compounds in the liquid form: O2, HF, H2O, NH3, H2O2, CCl4, CHCl3, C6H6, C6H5Cl. When a charged comb is brought near their flowing stream, how many of them show deflection as per the following figure?
Answer: 6 Only polar molecules are deflected by charged comb. Polar molecules: HF, H2O, NH3, H2O2, CHCl3, C6H5Cl Non-polar molecules:... View Article
The 1st, 2nd, and the 3rd ionization enthalpies, 1, 2, and 3, of four atoms with atomic numbers n, + 1, + 2, and + 3, where < 10, are tabulated below. What is the value of n?
Atomic Number Ionization Enthalpy (kJ/mol) I1 I2 I3 n 1681 3374 6050 n+1 2081 3952 6122 n+2 469 4562 6910... View Article
Consider the compound A [Cr (H2O)6] Cl3 ; yellow B [Cr(NH3)6] Cl3 violet. Then which of the following is incorrect.
a) (Δ0)A< (Δ0)B b) The crystal field splitting parameter can be measured by wavelengths of complementary colors for (A) and... View Article
Choose the correct option from the image given below:
Answer (1)
Write the product of given reaction:
Answer (1) It involves nucleophilic substitution reaction (SN2 ) followed by oxidation with oxidising agent and removal of water molecule.
Arrange the following amino acids in order of their PKa order.
Lysine, Aspartic acid, Arginine, Glycine. a) lys > Arg > Gly > Asp b) Arg > Lys > Asp >... View Article
In the given image, X will be
a) R-CH=0 b) R-CH2NH2 c) R COOH d) R-NH2 Answer (a) Classical reduction ⎯⎯→ Aldehyde is formed.
Product X → Y will be
a) Ph − CH − Cl Ph− CH2− NC b) PhCH2OH Ph− CH2 −... View Article
Match the following drugs with correct functional group test
A) Chloroxylenol P) Carbylamines B) Penicillin Q) Baeyer’s reagent C) Sulpha Pyridine R) FeCl3 test D) Norethindrone S) Sodium hydrogen... View Article
Maximum spin only magnetic moment for transition metal complex may be
a) 5.92 BM b) 6.92 BM c) 4.89 BM d) 3.87 BM Answer: (a) In Transition metal complex maximum number... View Article
Aluminium exist in +3 stable whereas thallium exists in both +1 & +3 oxidation state. Reason for this is
a) Inert pair effect b) Lanthanoid contraction c) Diagonal relationship d) None of these Answer: (a) Due to inert pair... View Article
Which of the following is a piezo electric material?
a) Silica) b) Quartz c) Mica d) Beryl Answer: (b) Piezoelectric → these are the material that produce electrical potential... View Article
which of the following properties is or are true for a silicone polymer
A) Thermally resistant and have low dielectric constant B) Resistant towards oxidation and used in grease C) Biocompatible D) Hydrophobic... View Article
Reversible isothermal expansion of gas for two temperature T1 and T2 (T2 > T1) Graph versus ([latex]left | w right |[/latex]) and ln v.
Answer: (2) w = – nRT ln (vf/vi) → constant is given same in all case. Take magnitude forW. (\(\begin{array}{l}\left... View Article
