NTA JEE Main 24th January 2023 Shift 2 - Chemistry

What is the number of unpaired electron(s) in the highest occupied molecular orbital of the following species: N$$_2$$, N$$_2^+$$, O$$_2$$, O$$_2^+$$?

Choose the correct representation of conductometric titration of benzoic acid vs sodium hydroxide.

In which of the following reactions the hydrogen peroxide acts as a reducing agent?

Identify the correct statements about alkali metals.
A. The order of standard reduction potential (M$$^+$$ | M) for alkali metal ions is Na > Rb > Li.
B. CsI is highly soluble in water.
C. Lithium carbonate is highly stable to heat.
D. Potassium dissolved in concentrated liquid ammonia is blue and paramagnetic.
E. All alkali metal hydrides are ionic solids.
Choose the correct answer from the options given below

Given below are two statements, one is labelled as Assertion A and the other is labelled as Reason R.
Assertion A: Beryllium has less negative value of reduction potential compared to the other alkaline earth metals.
Reason R: Beryllium has large hydration energy due to small size of Be$$^{2+}$$ but relatively large value of atomisation enthalpy.
In the light of the above statements, choose the most appropriate answer from the options given below.

The number of s-electrons present in an ion with 55 protons in its unipositive state is

Which will undergo deprotonation most readily in basic medium?

Given below are two statements:
Statement I:

under Clemmensen reduction conditions will give

Statement II:

under Wolff-Kishner reduction condition will give

In the light of the above statements, choose the correct answer from the options given below:

Given below are two statements, one is labelled as Assertion A and the other is labelled as Reason R.
Assertion A: Benzene is more stable than hypothetical cyclohexatriene.
Reason R: The delocalized $$\pi$$ electron cloud is attracted more strongly by nuclei of carbon atoms.
In the light of the above statements, choose the correct answer from the options given below:

The metal which is extracted by oxidation and subsequent reduction from its ore is:

Which one amongst the following are good oxidising agents?
(a) Sm$$^{2+}$$
(b) Ce$$^{2+}$$
(c) Ce$$^{4+}$$
(d) Tb$$^{4+}$$
Choose the most appropriate answer from the options below:

K$$_2$$Cr$$_2$$O$$_7$$ paper acidified with dilute H$$_2$$SO$$_4$$ turns green when exposed to

Which of the following cannot be explained by crystal field theory?

The hybridization and magnetic behaviour of cobalt ion in [Co(NH$$_3$$)$$_6$$]$$^{3+}$$ complex, respectively is

Find out the major products from the following reactions.

Given below are two statements:
Statement I: Pure Aniline and other arylamines are usually colourless.
Statement II: Arylamines get coloured on storage due to atmospheric reduction.
In the light of the above statements, choose the most appropriate answer from the options given below:

Choose the correct colour of the product for the following reaction.

Correct statement is:

Match List I with List II
LIST I (Type)                   LIST II (Name)
A. Antifertility drug        I. Norethindrone
B. Tranquilizer               II. Meprobromate
C. Antihistamine            III. Seldane
D. Antibiotic                  IV. Ampicillin
Choose the correct answer from the options given below:

Following figure shows spectrum of an ideal black body at four different temperatures. The number of correct statement/s from the following is _____.

A. $$T_4 > T_3 > T_2 > T_1$$
B. The black body consists of particles performing simple harmonic motion.
C. The peak of the spectrum shifts to shorter wavelength as temperature increases.
D. $$\frac{T_1}{\nu_1} = \frac{T_2}{\nu_2} = \frac{T_3}{\nu_3}$$
E. The given spectrum could be explained using quantisation of energy

Sum of $$\pi$$-bonds present in peroxodisulphuric acid and pyrosulphuric acid is

The number of statement's, which are correct with respect to the compression of carbon dioxide from point (a) in the Andrews isotherm from the following is _____.

A. Carbon dioxide remains as a gas upto point (b)
B. Liquid carbon dioxide appears at point (c)
C. Liquid and gaseous carbon dioxide coexist between points (b) and (c)
D. As the volume decreases from (b) to (c), the amount of liquid decreases

One mole of an ideal monoatomic gas is subjected to changes as shown in the graph. The magnitude of the work done (by the system or on the system) is _____ J (nearest integer)

Given: log 2 = 0.3, ln 10 = 2.3

If the pKa of lactic acid is 5, then the pH of 0.005 M calcium lactate solution at 25°C is _____ $$\times 10^{-1}$$ (Nearest integer)

The Total pressure observed by mixing two liquid A and B is 350 mm Hg when their mole fractions are 0.7 and 0.3 respectively. The Total pressure becomes 410 mm Hg if the mole fractions are changed to 0.2 and 0.8 respectively for A and B. The vapour pressure of pure A is _____ mm Hg. (Nearest integer) Consider the liquids and solutions behave ideally

The number of units, which are used to express concentration of solutions from the following is _____.
(Mass percent, Mole, Mole fraction, Molarity, ppm, Molality.)

A student has studied the decomposition of a gas $$AB_3$$ at 25°C. He obtained the following data

The order of the reaction is

The number of statement/s which are the characteristics of physisorption is _____.
A. It is highly specific in nature
B. Enthalpy of adsorption is high
C. It decreases with increase in temperature
D. It results into unimolecular layer
E. No activation energy is needed

Maximum number of isomeric monochloro derivatives which can be obtained from 2,2,5,5-tetramethylhexane by chlorination is _____

Total number of tripeptides possible by mixing of valine and proline is _____.