NTA JEE Main 6th April 2023 Shift 2 - Chemistry

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NTA JEE Main 6th April 2023 Shift 2 - Chemistry - Question 44

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

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NTA JEE Main 6th April 2023 Shift 2 - Chemistry - Question 48

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

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NTA JEE Main 6th April 2023 Shift 2 - Chemistry - Question 51

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$$_4$$]$$^{2-}$$

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NTA JEE Main 6th April 2023 Shift 2 - Chemistry - Question 53

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)

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NTA JEE Main 6th April 2023 Shift 2 - Chemistry - Question 54

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

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NTA JEE Main 6th April 2023 Shift 2 - Chemistry - Question 56

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$$_4$$)$$_3$$

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NTA JEE Main 6th April 2023 Shift 2 - Chemistry - Question 57

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 ______.

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NTA JEE Main 6th April 2023 Shift 2 - Chemistry - Question 58

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

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