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Identify the aromatic compound:

The formal charge of S atom in $S{O}_3$ is :

A cylinder containing cooking gas can withstand a pressure of 15 atm. The pressure gauge of the cylinder indicates 12 atm at ${27}^{\circ }C$. Due to a sudden fire in the building, the temperature starts rising. At what temperature will the cylinder explode?

The element which readily forms an ionic bond has the electronic configuration.

Match the following crystal system with their Bravais lattice

The chain isomer of butane is:

Catalyzed by iron, alkali metals dissolve in liquid ammonia to yield:

Electron affinity of the element or ions is correctly shown in :

Decomposition of $H_2{O}_2$ follows a first order reaction. In fifty minutes the concentration of $H_2{O}_2$ decreases from 0.5 to 0.125 M in one such decomposition. When the concentration of $H_2{O}_2$ reaches 0.05 M, the rate of formation of $O_2$ will be:

Hawroth structure of β - D (+) glucose is?

The number of isomers possible for $C_4{H}_8$ are

Which of the following atomic numbers is not matched with their correct electronic configuration?

The correct order of hydration energy of alkaline earth metal ion is

Oxidation state of oxygen in Super oxides is:

The density of 3 molal solution of NaOH is $1.110gm{L}^{-1}$. Calculate the molarity of the solution.

Why do we prefer unsaturated fatty acids in our diet?

The radioactive sources A and B with half lives of $t$ hr and $2t$ hr respectively, initially contains the same number of radioactive atoms. At the end of t hours, their rates of disintegration are in the ratio :

In which of the following alkenes the addition of $HBr$ is easiest?

In which of the following sets, the items are from distinct categories?

In the following reaction sequence, structure for D is:
$C{H}_{3}COOH\stackrel{SOC{l}_2}{\to }A\underset{anhyd.AlC{l}_3}{\overset{C_6{H}_6}{\to }}B\stackrel{HCN}{\to }C\underset{H_{2}O}{\overset{dil.H^{+}}{\to }}D$

Which of the following compound(s) will not undergo $\beta$- Elimination reaction on reacting with alcoholic KOH?

Dehydrohalogenation of an alkyl halide is a/an

Identify the correct order of boiling points of the following compounds:
1. $C{H}_{3}C{H}_{2}C{H}_{2}C{H}_{2}OH$
2. $C{H}_{3}C{H}_{2}C{H}_{2}CHO$
3. $C{H}_{3}C{H}_{2}C{H}_{2}COOH$

In an exothermic reaction, heat is evolved, and system loses heat to the surrounding. For such system
(a) $q_p$ will be negative
(b) ${\Delta }_{r}H$ will be negative
(c) $q_p$ will be positive
(d) ${\Delta }_{r}H$ will be positive

At low pressures (For 1 mole), the van der Waals equation is written as $[p+\frac{a}{V^2}]V=RT$ The compressibility factor is then equal to:

Which of the following plots does not represent Boyle’s law?

Match the column I and II.

The number of P-0-P bonds in cyclic metaphosphoric acid is

1)0

2)2

3)3

4)4

$N{a}_2{B}_4{O}_7+2HCl⟶2NaCl+A$

$N{a}_2{B}_4{O}_7+H_{2}S{O}_4\to N{a}_{2}S{O}_4+A$. A is as follows:

Which of the following compounds contain(s) no covalent bond(s)?
$KCl,P{H}_3,O_2,B_2{H}_6,H_{2}S{O}_4$

What is the entropy change involved in the isothermal expansion of 5 mol of ideal gas from a volume of 10L to 100L at 300 K?

Given:

The enthalpy of hydrogenation of these compounds will be in the order as:

If optical rotation produced by the compound (A) is $+{52}^{\circ }$, the one produced by compound (B) is:

Which of the following can act as oxidizing agent but not a reducing agent:

Which statement is not true about potash alum?

Tertiary butyl methyl ether on heating with HI gives a mixture of

Out of C and CO, which is a better reducing agent for ZnO ?

Which of the following set of orbitals have $n+l=7$

In an atom, an electron is moving with the speed of 600 $m/s$ have an accuracy of 0.005%. The minimum uncertainity with which the position of the electron can be located is:
$h=6.6\times {10}^{-34}Js,\text{mass of electron},e_m=9.1\times {10}^{-31}kg$

The de Broglie equation describes the relationship of wavelength associated with the wave-like nature of an electron and its

The correct order of hydrogen bond strength and boiling point respectively is

Which of the following salt does not impart colour to the flame?

A metal gives two chlorides ‘A’ and ‘B’. ‘A’ gives black precipitate with $N{H}_{4}OH$ and ‘B’ gives white precipitate .With KI ,‘B’ gives a red precipitate soluble in excess of KI. ‘A’ and ‘B’ are respectively :