NTA JEE Main 6th April 2023 Shift 2 - Chemistry

If the radius of the first orbit of hydrogen atom is $$a_0$$, then de Broglie's wavelength of electron in 3$$^{rd}$$ orbit is

Which one of the following elements will remain as liquid inside pure boiling water?

Group-13 elements react with O$$_2$$ in amorphous form to form oxides of type M$$_2$$O$$_3$$ (M = element). Which among the following is the most basic oxide?

During the reaction of permanganate with thiosulphate, the change in oxidation of manganese occurs by value of 3. Identify which of the below medium will favour the reaction.

The volume of 0.02 M aqueous HBr required to neutralize 10.0 mL of 0.01 M aqueous Ba(OH)$$_2$$ is (Assume complete neutralization)

Ion having highest hydration enthalpy among the given alkaline earth metal ions is:

Structures of BeCl$$_2$$ in solid state, vapour phase and at very high temperature respectively are:

From the figure of column chromatography given below, identify incorrect statements.

A. Compound 'c' is more polar than 'a' and 'b'
B. Compound 'a' is least polar
C. Compound 'b' comes out of the column before 'c' and after 'a'
D. Compound 'a' spends more time in the column
Choose the correct answer from the options given below

The strongest acid from the following is

The group of chemicals used as pesticide is

The product, which is not obtained during the electrolysis of brine solution is

Consider the following reaction that goes from A to B in three steps as shown below:

Choose the correct option

The IUPAC name of K$$_3$$[Co(C$$_2$$O$$_4$$)$$_3$$] is:

Given below are two statements: one is labelled as 'Assertion A' and the other is labelled as 'Reason R'
Assertion A: In the complex Ni(CO)$$_4$$ and Fe(CO)$$_5$$, the metals have zero oxidation state.
Reason R: Low oxidation states are found when a complex has ligands capable of $$\pi$$-donor character in addition to the $$\sigma$$-bonding.
In the light of the above statements, choose the most appropriate answer from the options given below

Element not present in Nessler's reagent is

In the following reaction, 'B' is

Find out the major product from the following reaction.

Given below are two statements:
Statement I: Morphine is a narcotic analgesic. It helps in relieving pain without producing sleep.
Statement II: Morphine and its derivatives are obtained from opium poppy.
In the light of the above statements, choose the correct answer from the options given below

Formation of which complex, among the following, is not a confirmatory test of Pb$$^{2+}$$ ions

Match List-I with List-II.

Choose the correct answer from the options given below:

The number of species having a square planar shape from the following is
XeF$$_4$$, SF$$_4$$, SiF$$_4$$, BF$$_4^-$$, BrF$$_4^-$$, [Cu(NH$$_3$$)$$_4$$]$$^{2+}$$, [FeCl$$_4$$]$$^{2-}$$, [PtCl$$_4$$]$$^{2-}$$

In an ice crystal, each water molecule is hydrogen bonded to ______ neighbouring molecules.

Consider the following data
Heat of combustion of H$$_2$$(g) = -241.8 kJ mol$$^{-1}$$
Heat of combustion of C(s) = -393.5 kJ mol$$^{-1}$$
Heat of combustion of C$$_2$$H$$_5$$OH(l) = -1234.7 kJ mol$$^{-1}$$
The heat of formation of C$$_2$$H$$_5$$OH(l) is (-) ______ kJ mol$$^{-1}$$ (Nearest integer)

The equilibrium composition for the reaction
$$PCl_3 + Cl_2 \rightleftharpoons PCl_5$$ at 298 K is given below:
[PCl$$_3$$]$$_{eq}$$ = 0.2 mol L$$^{-1}$$, [Cl$$_2$$]$$_{eq}$$ = 0.1 mol L$$^{-1}$$, [PCl$$_5$$]$$_{eq}$$ = 0.40 mol L$$^{-1}$$
If 0.2 mol of Cl$$_2$$ is added at the same temperature, the equilibrium concentrations of PCl$$_5$$ is ______ $$\times 10^{-2}$$ mol L$$^{-1}$$
Given: K$$_c$$ for the reaction at 298 K is 20

Number of crystal systems from the following where body centred unit cell can be found, is ______.
Cubic, tetragonal, orthorhombic, hexagonal, rhombohedral, monoclinic, triclinic

Consider the following pairs of solution which will be isotonic at the same temperature. The number of pairs of solutions is/are ______.
A. 1 M aq. NaCl and 2 M aq. urea
B. 1 M aq. CaCl$$_2$$ and 1.5 M aq. KCl
C. 1.5 M aq. AlCl$$_3$$ and 2 M aq. Na$$_2$$SO$$_4$$
D. 2.5 M aq. KCl and 1 M aq. Al$$_2$$(SO$$_4$$)$$_3$$

The standard reduction potentials at 295 K for the following half cells are given below:
NO$$_3^-$$ + 4H$$^+$$ + 3e$$^-$$ $$\rightarrow$$ NO(g) + 2H$$_2$$O   E° = 0.97 V
V$$^{2+}$$(aq) + 2e$$^-$$ $$\rightarrow$$ V(s)   E° = -1.19 V
Fe$$^{3+}$$(aq) + 3e$$^-$$ $$\rightarrow$$ Fe(s)   E° = -0.04 V
Ag$$^+$$(aq) + e$$^-$$ $$\rightarrow$$ Ag(s)   E° = 0.80 V
Au$$^{3+}$$(aq) + 3e$$^-$$ $$\rightarrow$$ Au(s)   E° = 1.40 V
The number of metal(s) which will be oxidised by NO$$_3^-$$ in aqueous solution is ______.

The number of colloidal systems from the following, which will have 'liquid' as the dispersion medium, is ______.
Gem stones, paints, smoke, cheese, milk, hair cream, insecticide sprays, froth, soap lather

Among the following the number of compounds which will give positive iodoform reaction is ______.
(a) 1-Phenylbutan-2-one
(b) 2-Methylbutan-2-ol
(c) 3-Methylbutan-2-ol
(d) 1-Phenylethanol
(e) 3, 3-dimethylbutan-2-one
(f) 1-Phenylpropan-2-ol

Number of isomeric aromatic amines with molecular formula C$$_8$$H$$_{11}$$N, which can be synthesized by Gabriel Phthalimide synthesis is ______.