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Calculate the total number of possible spectral lines in the UV region, during the transition of an electron from the $4^{\text{th}}$ excited state to the ground state in a sample of Hydrogen atoms.

1 gram sample of $N{H}_{4}N{O}_3$ is decomposed in a bomb calorimeter. The temperature of the calorimeter increases by 6.12 K. The heat capacity of the system is 1.23 kJ/g-deg. What is the molar heat of decomposition for $N{H}_{4}N{O}_3$?

Ethene when treated with Br₂ in the presence of CCl₄ which compound is formed

Balance the following chemical equation in basic medium:$\underset{\left(aq\right)}{Mn{O}_4^{-}}+\underset{\left(aq\right)}{B{r}^{-}}\to \underset{\left(s\right)}{Mn{O}_2}+\underset{\left(aq\right)}{Br{O}_3^{-}}$

For adiabatic expansion of an ideal gas, the fractional change in its pressure is equal to :



$(\gamma$ is the ratio of specific heats and $V$ is the volume of the gas$)$

The element with lowest ionization energy among the following is:

Identify AB and rewrite the following reaction H3C-CH2-CH2-OH-socl2--->(A) -alc. KOH---->(B) .

What is the final major product of the following sequence of reactions?

Number of carbon atoms in the compound D is
$\text{Acetaldehyde}\stackrel{K_{2}C{r}_2{O}_7}{\to }A\underset{\leftharpoondown H_{2}O}{\overset{Ca(OH{)}_2}{\to }}B\stackrel{ditillation}{\to }C\stackrel{dil.NaOH}{\to }D$ ___

An electron beam has a kinetic energy equal to 100 eV. Find its wavelength associated with a beam, if mass of electron $=9.1\times {10}^{-31}\text{kg}$ and $1\text{eV}=1.6\times {10}^{-19}\text{V}$. (Planck’s constant $=6.6\times {10}^{-34}\text{Js}$)

The favorable conditions for the hydration of alkenes are

The equilibrium pressure of $N{H}_{4}CN\left(s\right)\rightleftharpoons N{H}_3\left(g\right)+HCN\left(g\right)$ is $0.3\text{atm}$. Calculate $K_p$ If $N{H}_{4}CN\left(S\right)$ is allowed to decompose in presence of $N{H}_3$ at $0.25\text{atm}$. Calculate partial pressure of $HCN$ at equilibrium.
$(\text{Given}:\sqrt{0.1525}\approx 0.39)$

Among the following ions which one has the highest paramagnetism?

A
cubic solid is made of two elements P and Q. Atoms of Q are at the
corners of the cube and P at the body-centre. What is the formula of
the compound? What are the coordination numbers of P and Q?

The following data were obtained at a certain temperature for the decomposition of ammonia in contact with tungsten:



$\begin{array}{cccc}\text{Relative}{t}_{1/2}& 3.64& 1.82& 0.91\\ \text{p(mm)}& 50& 100& 200\end{array}$

($t_{1/2}$ is the half life and $\text{p}$ is the partial pressure of ammonia at different intervals.)

Find the order of the reaction.

If [A] is the concentration of reactant A at any time t and [A_o] is the concentration at t=0, then for the first order reaction the rate equation can be written as:

Identify total number of $3^o$ hydrogens and $2^o$ hydrogens present in the given compound :
$H_{3}C-C(C{H}_3{)}_2-(C{H}_2{)}_2-CH(C{H}_3{)}_2$

In a process a system does 140 J of work on the surrondings and only 40 J of heat is added to the system, hence change in internal energy is

Which wedge - dash structure represents the same compound as that given by the following fischer projection?

Which of the following graphs represents the radial charge density for the electron of outer most sub shell of $C{u}^{2+}$?