NTA JEE Main 6th April 2023 Shift 2

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 ______.