Ceric ammonium nitrate and CHCl3/alc. KOH are used for the identification of functional groups present in __________ and _______ respectively.
Answer
(C)
alcohol, amine
3
In $$\mathop C\limits^1 {H_2} = \mathop C\limits^2 = \mathop C\limits^3 H - \mathop C\limits^4 {H_3}$$ molecule, the hybridization of carbon 1, 2, 3 and 4 respectively, are :
Answer
(A)
sp2, sp, sp2, sp3
4
A. Phenyl methanamine
B. N,N-Dimethylaniline
C. N-Methyl aniline
D. Benzenamine
Choose the correct order of basic nature of the above amines.
Answer
(D)
A > B > C > D
5
Given below are two statements : one is labelled as Assertion A and the other is labelled as Reason R.
Assertion A : In TlI3, isomorphous to CsI3, the metal is present in +1 oxidation state.
Reason R : Tl metal has fourteen f electrons in its electronic configuration.
In the light of the above statements, choose the most appropriate answer from the options given below :
Answer
(C)
Both A and R are correct but R is NOT the correct explanation of A
6
Which of the following forms of hydrogen emits low energy $$\beta$$- particles?
Answer
(A)
Tritium $$_1^3$$H
7
Which pair of oxides is acidic in nature?
Answer
(C)
B2O3, SiO2
8
Identify A in the given reaction.
Answer
(C)
9
Match List - I with List - II.
Choose the correct answer from the options given below :
Seliwanoff test and Xanthoproteic test are used for the identification of ___________ and ________ respectively.
Answer
(A)
ketoses, proteins
17
When 12.2 g of benzoic acid is dissolved in 100 g of water, the freezing point of solution was found to be $$-$$0.93$$^\circ$$C (Kf(H2O) = 1.86 K kg mol$$-$$1). The number (n) of benzoic acid molecules associated (assuming 100% association) is ___________.
Answer
2
18
If the activation energy of a reaction is 80.9 kJ mol$$-$$1, the fraction of molecules at 700 K, having enough energy to react to form products is e$$-$$x. The value of x is __________. (Rounded off to the nearest integer) [Use R = 8.31 J K$$-$$1 mol$$-$$1]
Answer
14
19
In mildly alkaline medium, thiosulphate ion is oxidized by $$MnO_4^ - $$ to "A". The oxidation state of sulphur in "A" is __________.
Answer
6
20
The average S-F bond energy in kJ mol$$-$$1 of SF6 is _____________. (Rounded off to the nearest integer)
[Given : The values of standard enthalpy of formation of SF6(g), S(g) and F(g) are - 1100, 275 and 80 kJ mol$$-$$1 respectively.]
Answer
309
21
Emf of the following cell at 298K in V is x $$\times$$ 10$$-$$2.
Zn|Zn2+(0.1 M)||Ag+ (0.01 M)|Ag
The value of x is _________. (Rounded off to the nearest integer)
The pH of ammonium phosphate solution, if pka of phosphoric acid and pkb of ammonium hydroxide are 5.23 and 4.75 respectively, is ___________.
Answer
7
23
The number of stereoisomers possible for [Co(ox)2(Br)(NH3)]2$$-$$ is ___________. [ox = oxalate]
Answer
3
24
A ball weighing 10 g is moving with a velocity of 90 ms$$-$$1. If the uncertainty in its velocity is 5%, then the uncertainty in its position is ___________ $$\times$$ 10$$-$$33 m. (Rounded off to the nearest integer)
[Given : h = 6.63 $$\times$$ 10$$-$$34 Js]
Answer
1
25
The NaNO3 weighed out to make 50 mL of an aqueous solution containing 70.0 mg Na+ per mL is _________ g. (Rounded off to the nearest integer)
[Given : Atomic weight in g mol$$-$$1 - Na : 23; N : 14; O : 16]
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