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5-bromo-2-pentanone $\underset{THF}{\overset{Mg}{\to }}\left(X\right)\stackrel{H_3{O}^{+}}{\to }Product\left(Y\right)$. The product (Y) of the above reaction is

The wave function, ${\Psi }_{n,l,m_l}$ is a methematical function whose value depends upon spherical polar coordinates (r, θ, Ф) of the electron and characterized by the quantum numbers n, l and m. Here r is distance from nucleus, θ is colatitude and Ф is azimuth. In the mathematical functions given in the Table, Z is atomic number and $a_0$ is Bohr radius.

Column 1	Column 2	Column 3
(i) 1s orbital	(i) ${\Psi }_{n,l,m_l}\propto {\left(\frac{Z}{a_0}\right)}^{\frac{3}{2}}{e}^{\left(\frac{-Zr}{a_0}\right)}$	(P)
(ii) 2s orbital	(ii) One radial node	(Q) Probability density at nucleus $\propto \frac{1}{a_0^3}$
(iii) 2 $p_z$ orbital	(iii) ${\Psi }_{n,l,m_l}\propto {\left(\frac{Z}{a_0}\right)}^{\frac{5}{2}}r{e}^{\left(\frac{-Zr}{2a_0}\right)}cos\theta$	(R) Probability density is maximum at nucleus
(iv) 3 $d_z^2$ orbital	(iv) xy-plane is a nodal plane	(S) Energy needed to excite electron from n = 2 state to n = 4 state is$\frac{27}{32}$ times the energy needed to excite electron from n = 2 state to n = 6 state

For $H{e}^{+}$ion, the only INCORRECT combination is:

In the tetranuclear unit of borax $\left[B_4{O}_5\right(OH{)}_4{]}^{2-}$, the number of B – O – B bridges formed between $s{p}^3$ boron & $s{p}^2$ boron is ‘x’ and the number B-O-B bridges formed between $s{p}^3$ boron & $s{p}^3$ boron is ‘y’.
Then (x – y) is___

The correct order of bond length is

An ideal gas whose adiabatic exponent equals to $\gamma =\frac{7}{5}$ is expanded according to the law $P=2V$. The initial volume of the gas is equal to $V_0=1\text{unit}$. As a result of expansion volume increases 4 times. (Take $R=\frac{25}{3}$ units )

Oxidation number of N in $(N{H}_4{)}_{2}S{O}_4$ is

When two atomic orbitals combine they form

At high $P{O}_2$ levels, where is most oxygen located?

Considering the elements $F,Cl,OandS,$ the correct order of their electron affinity values is:

You are residing in a highly populated area of Mumbai. Due to overpopulation, your locality harms the environment. Suggest any three measures to your neighbours to protect the environment.

Which of the followings pair does not consist of greenhouse gases?

A single compound of the structure

is obtainable from ozonolysis of which of the following cyclic compounds ?

Calculate the wave number for the shortest wavelength transition in Brackett series for atomic hydrogen.

II. In the following reaction sequence, the compound J is an intermediate.

$J\left(C_9{H}_8{O}_2\right)$ gives effervescence on treatment with $NaHC{O}_3$ and a positive Bayer’s test.

The compound I is

The minimum energy required by an electron to overcome the attractive forces of the nucleus is $0.6\times {10}^{-19}\text{J}$. What is the maximum kinetic energy of the ejected electron if the material is radiated with a light of wavelength $2210\text{nm}$?

For given reaction sequence:
$\text{Phenol}\underset{NaOH}{\overset{C{O}_2}{\to }}\left(A\right)\stackrel{H^{+}}{\to }\left(B\right)\underset{H^{+}}{\overset{A{c}_{2}O}{\to }}\left(C\right)$

(C) is:

What is the difference between the coordination entity and the coordination sphere?

The correct order of the $1^{st}$ electron affinities of $N,O,F,S$ and $Cl$ is:

Mark the correct increasing order of reactivity of the following compounds with HBr / HCl.

(a) I < II < III
(b) II < I < III
(c) II < III < I
(d) III < II < I

Hydrogen bond is:

The spectral line of the shortest wavelength in Balmer series of atomic hydrogen will be:

Write Lewis symbols for the following atoms and ions: S and S2– ; Al and Al3+; H and H–

A solid $‘A{B}^{\prime }$ has the $NaCl$ structure, and $‘A^{\prime }$ atoms occupy the corners of the cubic unit cell. If all the face-centred atoms along one of the axes are removed, then the resultant formula of the of the unit cell of the solid will be:

What is ester?who was the person who worked upon esters

Out of o - nitrophenol and p - nitrophenol, which is more volatile? Explain.

Identify the order of the reaction from the following rate constants respectively
a. $k=7.06\times {10}^{-3}{\text{mol}}^{-1}{\text{L s}}^{-1}$
b. $k=5.60\times {10}^{-5}{\text{s}}^{-1}$
c. $k=1.25\times {10}^{-2}{\text{mol L}}^{-1}{\text{s}}^{-1}$
d. $k=1.25\times {10}^{-2}{\text{mol}}^{-2}{\text{L}}^2{\text{s}}^{-1}$

Conductance of 0.1 M KCl (conductivity = x $oh{m}^{-1}c{m}^{-1}$)
filled in a conductivity cell is y $oh{m}^{-1}$. If the conductance of 0.1 M NaOH filled in the same cell is z $oh{m}^{-1}$, molar conductance of NaOH will be :

$D_2$O has maximum density at

A hydrocarbon contains 17.2% of hydrogen and has a relative molecular mass of 58. Its molecular formula is:
(Given: Atomic masses of: C = 12 g, H = 1 g)

Ionisation energy and electron affinity of fluorine are respectively $17.42$ and $3.45\text{eV}.$ Calculate the electronegativity of fluorine atom on Pauling's scale.

The number of ${}^{\prime }{\pi }^{\prime }$ - electrons which can not offer aromatic character to a cyclic compound is

The most stable carbocation among the following is

The polymer used as electrodes in batteries is

If an atom is present in the edge centre of a unit cell, it will be shared by how many cubes?

$SnC{l}_2+2NaOH\to A+2NaCl$

$A+2NaOH\to B+2H_{2}O$

Identify A and B

Ionization constants of weak acid HA and weak base BOH are $3.0\times {10}^{-7}$ each at 298 K. The percent degree of hydrolysis of their salt at the dilution of 10 L is :

Sodium is heated in air at ${350}^{\circ }C$ to form 'X'. 'X' absorbs $C{O}_2$ and forms sodium carbonate and Y. Which of the following is Y?

In a compound, oxide ions have a cubic close packing arrangement. Cations A are present in half of the tetrahedral voids and cation B occupies the octahedral voids. The simplest formula of the compound is:

Iodoform can be obtained on warming $NaOH$ and iodine with:

The mass of 2 mol of $MgC{l}_2$ is: g

Calculate $\left[H^{+}\right]$ of solution obtained by mixing equal volume of 0.02 M $HN{O}_2$ ( a weak acid) and 0.2 M $C{H}_{3}COOH$ solution.
Given that:
$K_{a_1}\left(HN{O}_2\right)=2\times {10}^{-4}$
$K_{a_2}\left(C{H}_{3}COOH\right)=2\times {10}^{-5}$
Where , $K_{a_1}and{K}_{a_2}$ are the dissociation constants of $HN{O}_{2}andC{H}_{3}COOH$ respectively.