The most common oxidation state of Lanthanoid elements is +3. Which of the following is likely to deviate easily from +3 oxidation state?
Answer
(A)
Ce (At. No. 58)
7
The correct order of nucleophilicity is
Answer
(D)
NH$$_2^ - $$ > NH3
8
Oxidation of toluene to benzaldehyde can be easily carried out with which of the following reagents?
Answer
(B)
CrO3/acetic anhydride, H3O+
9
The major product in the following reaction
Answer
(A)
10
Halogenation of which one of the following will yield m-substituted product with respect to methyl group as a major product?
Answer
(C)
11
The reagent, from the following, which converts benzoic acid to benzaldehyde in one step is
Answer
(C)
MnO
12
The final product 'A' in the following reaction sequence
Answer
(A)
13
Which statement is NOT correct for p-toluenesulphonyl chloride?
Answer
(C)
On treatment with secondary amine, it leads to a product, that is soluble in alkali.
14
The final product 'C' in the following series of reactions
Answer
(C)
15
Which one of the following is a water soluble vitamin, that is not excreted easily?
Answer
(D)
Vitamin B12
16
CNG is an important transportation fuel. When 100 g CNG is mixed with 208 g oxygen in vehicles, it leads to the formation of CO2 and H2O and produces large quantity of heat during this combustion, then the amount of carbon dioxide, produced in grams is ____________. [nearest integer]
[Assume CNG to be methane]
Answer
143
17
Amongst SF4, XeF4, CF4 and H2O, the number of species with two lone pairs of electrons is _____________.
Answer
1
18
A fish swimming in water body when taken out from the water body is covered with a film of water of weight 36 g. When it is subjected to cooking at 100$$^\circ$$C, then the internal energy for vaporization in kJ mol$$-$$1 is ___________. [nearest integer]
[Assume steam to be an ideal gas. Given $$\Delta$$vapH$$^\Theta $$ for water at 373 K and 1 bar is 41.1 kJ mol$$-$$1 ; R = 8.31 J K$$-$$1 mol$$-$$1]
Answer
38
19
The osmotic pressure exerted by a solution prepared by dissolving 2.0 g of protein of molar mass 60 kg mol$$-$$1 in 200 mL of water at 27$$^\circ$$C is ______________ Pa. [integer value]
(use R = 0.083 L bar mol$$-$$1 K$$-$$1)
Answer
415
20
40% of HI undergoes decomposition to H2 and I2 at 300 K. $$\Delta$$G$$^\Theta $$ for this decomposition reaction at one atmosphere pressure is __________ J mol$$-$$1. [nearest integer]
The Gibbs free energy change for the above reaction at 298 K is x $$\times$$ 10$$-$$1 kJ mol$$-$$1. The value of x is __________. [nearest integer]
[Given : $$E_{C{u^{2 + }}/Cu}^\Theta = 0.34\,V$$ ; $$E_{S{n^{2 + }}/Sn}^\Theta = - 0.14\,V$$ ; F = 96500 C mol$$-$$1]
Answer
983
22
Catalyst A reduces the activation energy for a reaction by 10 kJ mol$$-$$1 at 300 K. The ratio of rate constants, $${{{}^kT,\,Catalysed} \over {{}^kT,\,Uncatalysed}}$$ is ex. The value of x is ___________. [nearest integer]
[Assume that the pre-exponential factor is same in both the cases. Given R = 8.31 J K$$-$$1 mol$$-$$1]
Answer
4
23
Reaction of [Co(H2O)6]2+ with excess ammonia and in the presence of oxygen results into a diamagnetic product. Number of electrons present in t2g-orbitals of the product is ___________.
Answer
6
24
The moles of methane required to produce 81 g of water after complete combustion is _____________ $$\times$$ 10$$-$$2 mol. [nearest integer]
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