NEET 2021

What is the IUPAC name of the organic compound formed in the following chemical reaction?

Consider the above reaction and identify the missing reagent/chemical.

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

The intermediate compound 'X' in the following chemical reaction is :

The product formed in the following chemical reaction is :

BF3 is planar and electron deficient compound. Hybridization and number of electrons around the central atom, respectively are :

Match List - I with List - II :



List - I

List - II




(a)
\(PC{l_5}\)
(i)
Square pyramidal


(b)
\(S{F_6}\)
(ii)
Trigonal planar


(c)
\(Br{F_5}\)
(iii)
Octa...

The correct sequence of bond enthalpy of 'C-X' bond is :

Which of the following molecules is non-polar in nature?

For a reaction, A \(\to\) B, enthalpy of reaction is \(-\)4.2 kJ mol\(-\)1 and enthalpy of activation is 9.6 kJ mol\(-\)1. The correct potential energy profile for the reaction is shown in option.

The slope of Arrhenius plot \(\left( {\ln \,k\,v/s{1 \over T}} \right)\) of first order reactino is \(-\)5 \(\times\) 103K. The value of Ea of the reaction is. Choose the correct option for your answer.[Given R = 8.314 JK\(-\)1mol\(-\)1]

Given below are two statements :Statement I :Aspirin and Paracetamol belong to the class of narcotic analgesics.Statement II :Morphine and Heroin are non-narcotic analgesics. In the light of the above statements, choose the correct answer f...

The RBC deficiency of deficiency disease of :

Ethylene diaminetetraacetate (EDTA) ion is :

Match List-I with List-II :



List-I

List-II




(a)
\({[Fe{(CN)_6}]^{3 - }}\)
(i)
5.92 BM


(b)
\({[Fe{({H_2}O)_6}]^{3 + }}\)
(ii)
0 BM


(c)
\({[Fe{(CN)_6}]^{4 - }}\)...

The incorrect statement among the following is :

Which of the following reactions is the metal displacement reaction? Choose the right option.

Zr (Z = 40) and Hf (Z = 72) have similar atomic and ionic radii because of :

The molar conductance of NaCl, HCl and CH3COONa at infinite dilution are 126.45, 426.16 and 91.0 S cm2 mol\(-\)1 respectively. The molar conductance of CH3COOH at infinite dilution is. Choose the right option for your answer.

The molar conductivity of 0.007 M acetic acid is 20 S cm2 mol\(-\)1. What is the dissociation constant of acetic acid? Choose the correct option.[\(\Lambda _{{H^ + }}^o\) = 350 S cm2 mol\(-\)1\(\Lambda _{C{H_3}CO{O^ - }}^o\) = 50 S cm2 mol$...

Match List-I with List-II :



List-I

List-II




(a)
\(2S{O_2}(g) + {O_2}(g) \to 2S{O_3}(g)\)
(i)
Acid rain


(b)
$$HOCl(g)\buildrel {hv} \over \longrightarrow \mathop O\limits^ \bullet H...

Choose the correct option for graphical representation of Boyle's law, which shows a graph of pressure vs. volume of a gas at different temperatures :

Choose the correct option for the total pressure (in atm.) in a mixture of 4g O2 and 2g H2 confined in a total volume of one litre at 0\(^\circ\)C is :[Given R = 0.082 L atm mol\(-\)1K\(-\)1, T = 273 K]

The major product of the following chemical reaction is :

The major product formed in dehydrohalogenation reaction of 2-Bromo pentane is Pent-2-ene. This product formation is based on?

The correct structure of 2, 6-dimethyl-dec-4-ene is

Tritium, a radioactive isotope of hydrogen, emits which of the the following particles?

The pKb of dimethyl amine and pKa of acetic acid are 3.27 and 4.77 respectively at T (K). The correct option for the pH of dimethyl ammonium acetate solution is :

Identify the compound that will react with Hinsberg's reagent to give a solid which dissolves in alkali.

Statement I : Acid strength increases in the order given as HF << HCl << HBr << HI.Statement II : As the size of the elements, F, Cl, Br, I increases down the group, the bond strength of HF, HCl, HBr and HI decreases and so the acid strengt...

Noble gases are named because of their inertness towards reactivity. Identify an incorrect statement about them.

In which one of the following arrangements the given sequence is not strictly according to the properties indicted against it?

Which one of the following polymers is prepared by addition polymerisation?

The reagent 'R' in the given sequence of chemical reaction is :

The maximum temperature that can be achieved in blast furnace is :

Which one of the following methods can be used to obtain highly pure metal which is liquid at room temperature?

Among the following alkaline earth metal halides, one which is covalent and soluble in organic solvents is :

The structures of beryllium chloride in solid state and vapour phase, are :

The correct option for the number of body centred unit cells in all 14 types of Bravais lattice unit cells is :

Right option for the number of tetrahedral and octahedral voids in hexagonal primitive unit cell are :

The following solutions were prepared by dissolving 10 g of glucose (C6H12O6) in 250 ml of water (P1), 10 g of urea (CH4N2O) in 250 ml of water (P2) and 10 g of sucrose (C12H22O11) in 250 ml of water (P3). The right option for the decreasin...

The correct option for the value of vapour pressure of a solution at 45\(^\circ\)C with benzene to octane in molar ratio 3 : 2 is :[At 45\(^\circ\)C vapour pressure of benzene is 280 mm Hg and that of octane is 420 mm Hg. Assume Ideal gas]

An organic compound contains 78% (by wt.) carbon and remaining percentage of hydrogen. The right option for the empirical formula of this compound is : [Atomic wt. of C is 12, H is 1]

The compound which shows metamerism is :

Dihedral angle of least stable conformer of ethane is :

A particular station of All India Radio, New Delhi broadcasts on a frequency of 1,368 kHz (kilohertz). The wavelength of the electromagnetic radiation emitted by the transmitter is : [speed of light c = 3.0 \(\times\) 108 ms\(-\)1]

From the following pairs of ions which one is not an iso-electronic pair?

The right option for the statement "Tyndall effect is exhibited by", is :

Which one among the following is the correct option for right relationship between CP and CV for one mole of ideal gas?

For irreversible expansion of an ideal gas under isothermal condition, the correct option is :