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The unequal sharing of bonded pair of electrons
between two atoms in a molecule gives rise to:

The movement of electrons in which one of the structure is not shown correctly?

The circumference of the first Bohr orbit in H atom is $3.322\times {10}^{-10}m$. What is the velocity of the electron of this orbit?

Electrode potential of hydrogen electrode is18mV then concentration of H+ is

Which of the following is known as synthesis gas?

The mole fraction of ethanol in water is $0.40$. Calculate its molality.

When vicinal dibromide is heated with KOH in ethanol followed by sodamide $\left({200}^{\circ }C\right)$, double dehydrohalogenation takes place giving alkyne. Which of the following fails to give alkyne according to this procedure?

Give condensed and bond line structural formulas and identify the functional group(s) present, if any, for:

(a)2,2,4-Trimethylpentane
(b)2-Hydroxy-1,2,3-propanetricarboxylic acid
(c) Hexanedial

The
correct order of reactivity of group
in given compounds is:

State the number of
significant figures in the following:

(a) 0.007 m²

(b) 2.64 × 10²⁴
kg

(c) 0.2370 g cm^–3

(d) 6.320 J

(e) 6.032 N m^–2

(f) 0.0006032 m²

Read the following questions and answer as per the directions given below:

Statement – I: The first ionization energy of Be is greater than that of B.

Statement – II: 2p-orbital is lower in energy than 2s.

$(C{H}_{3}COO{)}_{2}Pb+Ca(OH{)}_2\to A+(C{H}_{3}COO{)}_{2}Ca$

$A+CaOC{l}_2\to B+CaC{l}_2+H_{2}O$

Identify A and B.

A gas is heated in a duct as it flows over a resistance heater. Consider a 101 kw electric heating system. The gas enters the heating section of the duct at 100 kPa and ${27}^{0}C$ with a volume flow rate of $15m^3/s$. If heat is lost from the gas in the duct to the surroundings at a rate of 51 kW, the exit temperature of the gas is (Assume constant pressure, ideal gas, negligible change in kinetic and potential energies and constant specific heat; $C_p=1kJ/kgK;R=0.5kJ/kgK)$

What is the normality of a $KMn{O}_4$ solution in which $15.8g$ of $KMn{O}_4$ is present in $250mL$ solution and the solution is used as an oxidant, where ${Mn{O}_4}^{-}$ is reduced to ${Mn}^{2+}$ ? (Given: molar mass of $KMn{O}_4=158gmo{l}^{-1}$ )

The energies of orbitals ( 3s, 3p, 4s, 4p, 3d)of H-atom are in the order

Find the ratio of the difference in energy between the first and the second Bohr's orbit to that between the second and third Bohr's orbit of a hydrogen atom.

A fixed mass ‘m’ of a gas is subjected to transformation of states from K to L to M to N and back to K shown in figure.

The pair of isochoric processes among the transformation of states is

Number of moles of nitrogen atom in 56 grams nitrogen gas

The number of electrons involved in the reduction of $C{r}_2{O}_7^{2-}$ in acidic solution to $C{r}^{3+}$ is

Complete the following reactions
$H_{2\left(g\right)}+M_m{O}_{\left(s\right)}\stackrel{\Delta }{\to }$

$C{O}_{\left(g\right)}+H_{2\left(g\right)}\underset{catalyst}{\overset{\Delta }{\to }}$

$C_3{H}_{8\left(g\right)}+3H_2{O}_{\left(g\right)}\underset{catalyst}{\overset{\Delta }{\to }}$

$Z{n}_{\left(s\right)}+2NaO{H}_{\left(aq\right)}\stackrel{heat}{\to }$

Explain why the following systems are not aromatic?

(i)

(ii)

(iii)

Three different processes that can occur in an ideal monoatomic gas are shown in the $P$ vs $V$ diagram. The paths are labelled as $A\to B$, $A\to C$ and $A\to D$. The change in internal energies during these process are taken as $E_{AB},E_{AC}$ and $E_{AD}$ and the workdone as $W_{AB},W_{AC}$ and $W_{AD}$. The correct relation between these parameters are

Calculate osmotic pressure of $3.42\%w/V$ solution of cane sugar (sucrose) at ${27}^{\circ }C$.

Given:

$\text{Molecular formula of sucrose is}{C}_{12}{H}_{22}{O}_{11}$