JEE Main 2021 (Online) 22th July Evening Shift

Which of the following compounds will provide a tertiary alcohol or reaction with excess of CH3MgBr followed by hydrolysis?

An organic compound A (C6H6O) gives dark green colouration with ferric chloride. On treatment with CHCl3 and KOH, followed by acidification gives compound B. Compound B can also be obtained from compound C on reaction with pyridinium chloro...

Which purification technique is used for high boiling organic liquid compound (decomposes near its boiling point)?

Which of the following compounds does not exhibit resonance?

Which of the following molecules does not show stereo isomerism?

The number of acyclic structural isomers (including geometrical isomers) for pentene are ___________

Thiamine and pyridoxine are also known respectively as :

Match List-I with List-II :



List-I(Species)

List-II(Hybrid Orbitals)




(a)
\(S{F_4}\)
(i)
\(s{p^3}{d^2}\)


(b)
\(I{F_5}\)
(ii)
\({d^2}s{p^3}\)


(c)
\(NO_2^ +\)
...

Value of KP for the equilibrium reactionN2O4(g) \(\rightleftharpoons\) 2NO2(g) at 288 K is 47.9. The KC for this reaction at same temperature is ____________. (Nearest integer)(R = 0.083 L bar K\(-\)1 mol\(-\)1)

Isotope(s) of hydrogen which emits low energy \(\beta\)\(-\) particles with t1/2 value > 12 years is/are

\({N_2}{O_{5(g)}} \to 2N{O_{2(g)}} + {1 \over 2}{O_{2(g)}}\)In the above first order reaction the initial concentration of N2O5 is 2.40 \(\times\) 10\(-\)2 mol L\(-\)1 at 318 K. The concentration of N2O5 after 1 hour was 1.60 \(\times\) 10$...

In the chemical reactions given above A and B respectively are :

Which one of the following reactions does not occur?

The total number of unpaired electrons present in [Co(NH3)6]Cl2 and [Co(NH3)6]Cl3 is :

The set having ions which are coloured and paramagnetic both is :

Number of electrons that Vanadium (Z = 23) has in p-orbitals is equal to _____________

Assume a cell with the following reaction\(C{u_{(s)}} + 2A{g^ + }(1 \times {10^{ - 3}}M) \to C{u^{2 + }}(0.250M) + 2A{g_{(s)}}\)\(E_{cell}^\Theta = 2.97\) VEcell for the above reaction is ______________ V. (Nearest integer)[Given : log 2.5...

The water having more dissolved O2 is :

Sulphide ion is soft base and its ores are common for metals.(a) Pb (b) Al (c) Ag (d) Mg

Given below are the statements about diborane(a) Diborane is prepared by the oxidation of NaBH4 with I2(b) Each boron atom is in sp2 hybridized state(c) Diborane has one bridged 3 centre-2-electron bond(d) Diborane is a planar moleculeThe o...

Which one of the following group-15 hydride is the strongest reducing agent?

Which one of the following statements for D.I. Mendeleeff, is incorrect?

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

Methylation of 10 g of benzene gave 9.2 g of toluene. Calculate the percentage yield of toluene __________. (Nearest integer)

Match List-I with List-II



List-I(Elements)

List-II(Properties)




(a)
Ba
(i)
Organic solvent soluble compounds


(b)
Ca
(ii)
Outer electronic configuration \(6{s^2}\)


...

A copper complex crystallising in a CCP lattice with a cell edge of 0.4518 nm has been revealed by employing X-ray diffraction studies. The density of a copper complex is found to be 7.62 g cm\(-\)3. The molar mass of copper complex is ____...

Which one of the following 0.06 M aqueous solutions has lowest freezing point?

If the concentration of glucose (C6H12O6) in blood is 0.72 g L\(-\)1, the molarity of glucose in blood is ____________ \(\times\) 10\(-\)3 M. (Nearest integer)[Given : Atomic mass of C = 12, H = 1, O = 16 u]

When silver nitrate solution is added to potassium iodide solution then the sol produced is :

If the standard molar enthalpy change for combustion of graphite powder is \(-\)2.48 \(\times\) 102 kJ mol\(-\)1, the amount of heat generated on combustion of 1 g of graphite powder is ___________ kJ. (Nearest integer)