JEE Main 2020 (Online) 7th January Evening Slot

The correct order of stability for the following alkoxides is :

A chromatography column, packed with silica gel as stationary phase, was used to separate a
mixture of compounds consisting of (A) benzanilide (B) aniline and (C) acetophenone. When the
column is eluted with a mixture of solvents, hexane : ...

Which of the following statements is correct ?

The bond order and the magnetic characteristics of CN-
are :

For the reaction 2H2(g) + 2NO(g) \(\to\) N2(g) + 2H2O(g) the observed rate expression is, rate = Kf[NO]2[H2]. The rate expression for the reverse reaction is :

The number of sp2 hybridised carbons present in "Aspartame" is

In the following reaction sequence,

The major product B is :

Among the statements(a)-(d) the incorrect ones are :
(a) Octahedral CO(III) complexes with strong fields ligands have very high magnetic moments.
(b) When \(\Delta\)0 < P, the d-electron configuration of Co(III) in an octahedral complex is...

The number of possible optical isomers for the complexes MA2B2 with sp3 and dsp2 hydridized metal atom. respectively, is :
Note : A and B are unidentate netural and unidentate monoanionic ligands, respectively.

Consider the following reactions :
\(NaCl{\rm{ }} + {\rm{ }}{K_2}C{r_2}{O_7} + \mathop {{H_2}S{O_4}}\limits_{(conc.)}\)\(\to\) (A) + side products

(A) + NaOH \(\to\) (B) + Side products
$$\left( B \right){\rm{ }} + \mathop {{H_2}S{O_4...

The equation that is incorrect is :

Identify the correct labels of A,B and C in the following graph from the options given below :

Root mean square speed (Vrms); most probable speed (Vmp); Average speed (Vav)

Consider the following reactions :




Which of these reactions are possible ?

For the following reactions

Ks and Ke, are respectively, the rate constants for substitution and elimination and \(\mu = {{{k_s}} \over {{k_e}}}\) the
correct options is

In the following reactions sequence, structure of A and B respectively will be :

Among the statements (a) - (d), the correct ones are :
(a) Decomposition of hydrogen peroxide gives dioxygen.
(b) Like hydrogen peroxide, compounds, such as KCIO3, Pb(NO3)2 and NaNO3 when heated liberate dioxygen.
(c) 2-Ethylanthraquinone i...

3 g of acetic acid is added to 250 mL of 0.1 M HCL and the solution made up to 500 mL. To 20 mL
of this solutions \({1 \over 2}\) mL of 5 M NaOH is added. The pH of the solution is __________.
[Given : pKa of acetic acid = 4.75, molar mass ...

The refining method used when the metal and the impurities have low and high melting temperatures, respectively, is :

In the following reaction, products (A) and (B) respectively, are :
NaOH + Cl2 \(\to\) (A) + side products
(hot and conc.)
Ca(OH)2 + Cl2 \(\to\) (B) + side products
(dry)

Within each pair of elements F & Cl, S & Se, and Li & Na, respectively, the elements that release
more energy upon and electron gain are :

The redox reaction among the following is :

Two open beakers one containing a solvent and the other containing a mixture of that solvent
with a non voltatile solute are together selated in a container. Over time :

The flocculation value of HCl for arsenic sulphide sol. is 30 m mol L-1 If H2SO4 is used for the flocculatiopn of arsenic sulphide, the amount in grams, of H2SO4 in 250 ml required for the above purposed is ______.
(molecular mass of H2SO4 ...

The ammonia (NH3) released on quantitative reaction of 0.6 g urea (NH2CONH2) with sodium hydroxide (NaOH) can be neutralized by :

The standard heat of formation \(\left( {{\Delta _f}H_{298}^0} \right)\) of ethane (in kj/mol), if the heat of combustion of
ethane, hydrogen and graphite are - 1560, -393.5 and -286 Kj/mol, respectively is :