JEE Main 2021 (Online) 27th August Evening Shift

The major product of the following reaction, if it occurs by SN2 mechanism is :

Given below are two statements :Statement I : Ethyl pent-4-yn-oate on reaction with CH3MgBr gives a 3\(^\circ\)-alcohol.Statement II : In this reaction one mole of ethyl pent-4-yn-oate utilizes two moles of CH3MgBr.In the light of the above...

Which one of the following reactions will not yield propionic acid?

The compound/s which will show significant intermolecular H-bonding is/are :

Hydrolysis of sucrose gives :

The number of species having non-pyramidal shape among the following is ___________.(A) SO3(B) NO\(_3^ -\)(C) PCl3(D) CO\(_3^{2 - }\)

When 5.1 g of solid NH4HS is introduced into a two litre evacuated flask at 27\(^\circ\)C, 20% of the solid decomposes into gaseous ammonia and hydrogen sulphide. The Kp for the reaction at 27\(^\circ\)C is x \(\times\) 10\(-\)2. The value ...

The first order rate constant for the decomposition of CaCO3 at 700 K is 6.36 \(\times\) 10\(-\)3s\(-\)1 and activation energy is 209 kJ mol\(-\)1. Its rate constant (in s\(-\)1) at 600 K is x \(\times\) 10\(-\)6. The value of x is ________...

Which one of the following chemicals is responsible for the production of HCl in the stomach leading to irritation and pain?

Which one of the following is the major product of the given reaction?

The correct structures of A and B formed in the following reactions are :

The number of optical isomers possible for [Cr(C2O4)3]3\(-\) is ____________.

The addition of dilute NaOH to Cr3+ salt solution will give :

Potassium permanganate on heating at 513 K gives a product which is :

The resistance of a conductivity cell with cell constant 1.14 cm\(-\)1, containing 0.001 M KCl at 298 K is 1500 \(\Omega\). The molar conductivity of 0.001 M KCl solution at 298 K in S cm2 mol\(-\)1 is ____________. (Integer answer)

In stratosphere most of the ozone formation is assisted by :

Which one of the following is used to remove most of plutonium from spent nuclear fuel?

The major product (A) formed in the reaction given below is :

The oxide that gives H2O2 most readily on treatment with H2O is :

Match List-I with List-II :



List - I(Name of ore/mineral)

List - II(Chemical formula)




(a)
Calmine
(i)
\(Zns\)


(b)
Malachite
(ii)
\(FeC{O_3}\)


(c)
Siderite
...

Which one of the following is formed (mainly) when red phosphorus is heated in a sealed tube at 803 K?

The correct order of ionic radii for the ions, P3\(-\), S2\(-\), Ca2+, K+, Cl\(-\) is :

Which one of the following tests used for the identification of functional groups in organic compounds does not use copper reagent?

Choose the correct statement from the following :

40 g of glucose (Molar mass = 180) is mixed with 200 mL of water. The freezing point of solution is __________ K. (Nearest integer) [Given : Kf = 1.86 K kg mol\(-\)1; Density of water = 1.00 g cm\(-\)3; Freezing point of water = 273.15 K]

100 g of propane is completely reacted with 1000 g of oxygen. The mole fraction of carbon dioxide in the resulting mixture is x \(\times\) 10\(-\)2. The value of x is ____________. (Nearest integer)[Atomic weight : H = 1.008; C = 12.00; O =...

The number of photons emitted by a monochromatic (single frequency) infrared range finder of power 1 mW and wavelength of 1000 nm, in 0.1 second is x \(\times\) 1013. The value of x is _____________. (Nearest integer)(h = 6.63 \(\times\) 10...

Lyophilic sols are more stable than lyophobic sols because :

Two flasks I and II shown below are connected by a valve of negligible volume.When the valve is opened, the final pressure of the system in bar is x \(\times\) 10\(-\)2. The value of x is __________. (Integer answer)[Assume - Ideal gas; 1 b...

Data given for the following reaction is as follows :FeO(s) + C(graphite) \(\to\) Fe(s) + CO(g)
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