JEE Main 2021 (Online) 26th February Evening Shift

Ceric ammonium nitrate and CHCl3/alc. KOH are used for the identification of functional groups present in __________ and _______ respectively.

Identify A in the given reaction.

2, 4-DNP test can be used to identify :

Considering the above reaction, the major product among the following is :

Identify A in the following chemical reaction.

Identify A in the given chemical reaction.

Match List - I with List - II.



List - I

List - II




(a)
Sucrose
(i)
\(\beta\)-D-Galactose and \(\beta\)-D-Glucose


(b)
Lactose
(ii)
\(\alpha\)-D-Glucose and \(\beta\)-D-F...

Match List - I with List - II.



List - I (Molecule)

List - II (Bond order)




(a)
\(N{e_2}\)
(i)
1


(b)
\({N_2}\)
(ii)
2


(c)
\({F_2}\)
(iii)
0


(d...

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...

A. Phenyl methanamineB. N,N-DimethylanilineC. N-Methyl anilineD. BenzenamineChoose the correct order of basic nature of the above amines.

The number of stereoisomers possible for [Co(ox)2(Br)(NH3)]2\(-\) is ___________. [ox = oxalate]

In mildly alkaline medium, thiosulphate ion is oxidized by \(MnO_4^ -\) to "A". The oxidation state of sulphur in "A" is __________.

Emf of the following cell at 298K in V is x \(\times\) 10\(-\)2.Zn|Zn2+(0.1 M)||Ag+ (0.01 M)|AgThe value of x is _________. (Rounded off to the nearest integer)[Given : $$E_{Z{n^{2 + }}/Zn}^\theta = - 0.76V;E_{A{g^{2 + }}/Ag}^\theta = +...

Match List - I with List - II.Choose the correct answer from the options given below :

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 :

The pH of ammonium phosphate solution, if pka of phosphoric acid and pkb of ammonium hydroxide are 5.23 and 4.75 respectively, is ___________.

Match List - I with List - II.



List - I

List - II




(a)
Siderite
(i)
Cu


(b)
Calamine
(ii)
Ca


(c)
Malachite
(iii)
Fe


(d)
Cryolite
(iv)...

Match List - I with List - II.



List - I

List - II




(a)
Sodium Carbonate
(i)
Deacon


(b)
Titanium
(ii)
Castner-Kellner


(c)
Chlorine
(iii)
van-Arkel

...

Calgon is used for water treatment. Which of the following statement is NOT true about Calgon?

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...

The correct order of electron gain enthalpy is :

Which pair of oxides is acidic in nature?

Seliwanoff test and Xanthoproteic test are used for the identification of ___________ and ________ respectively.

The number of octahedral voids per lattice site in a lattice is _________. (Rounded off to the nearest integer)

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)...

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]

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 $$\ti...

Which of the following forms of hydrogen emits low energy \(\beta\)- particles?

The nature of charge on resulting colloidal particles when FeCl3 is added to excess of hot water is :

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.]