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Which of the following is the correct order for the increasing atomic radius?

In a reaction

A
+ B₂ →
AB₂

Identify the limiting
reagent, if any, in the following reaction mixtures.

(i) 300 atoms of A +
200 molecules of B

(ii) 2 mol A + 3 mol B

(iii) 100 atoms of A +
100 molecules of B

(iv) 5 mol A + 2.5 mol
B

(v) 2.5 mol A + 5 mol B

If the difference between $(n+1{)}^{th}$ Bohr radius and $n^{th}$ Bohr radius is equal to the $(n-1{)}^{th}$ Bohr radius, then the value of $n$ is

The correct energy level diagram for $\left[Co\right(CN{)}_6{]}^{3-}$ is

If $He\left(g\right)$ is bubbled through the water at $298K$, how many millimoles of $He\left(g\right)$ would dissolve in one litre of water?

Assume that $He\left(g\right)$ exerts a partial pressure of $0.5bar$

Take Henry's Law constant for $He\left(g\right)$ at $298K$ as $145kBar$

Sulphur dioxide reacts with chlorine in the presence of charcoal to give

Consider the inter conversion of nitrosotriaceto amine into nitrogen, phorone and water.


The reaction is $1^{st}$ order in each direction, with an equilibrium constant of ${10}^4$. The activation energy for the backward reaction is 57.45 kJ/mol. Assume its Arrhenius pre exponential factor as ${10}^{12}{s}^{-1}$.

Calculate $K_p$ of the reaction at 300 K

Question 52

Match the species in Column I with the type of hybrid orbitals in Column II.

$\begin{array}{cccc}& \text{Column~I}& & \text{Column~II}\\ A.& S{F}_4& 1.& s{p}^3{d}^2\\ B.& I{F}_5& 2.& d^{2}s{p}^3\\ C.& N{O}_2^{+}& 3.& s{p}^{3}d\\ D.& N{H}_4^{+}& 4.& s{p}^3\\ & & 5.& sp\end{array}$

Calculate the momentum of a particle which has a de Broglie wavelength of $4.5\times {10}^{-10}m$.

$(\text{Planck's constant},h=6.6\times {10}^{-34}kg{m}^2{s}^{-1})$

Shape of $O_2{F}_2$, is similar to that of

Which is more soluble? $LiF$ or $KF$

A bulb emits light of wavelength $198\text{nm}$. The bulb is rated as $100\text{watt}$ and $10\%$ of the energy is emitted as light. The number of photons emitted per second is ${10}^x$. Take $h=6.6\times {10}^{-34}$. The value of $x$ is

How much water is needed to dilute 10 ml of 10 N HCl to make it exactly deci-normal?

In a multi-electron atom, which of the following orbitals described by the three quantum numbers will have the same energy in the absence of magnetic and electric fields?

Benzene can be converted in to 1,3-dihydroxy benzene in four steps as follows:


The correct sequence of reagents for this conversion is:

The number of anti-bonding electron pairs in $O_2^{2–}$ molecular ion on the basis of molecular orbital theory is:

Aluminium has a diagonal relationship with:

Cis-trans isomerism is shown by:

The correct order of dehydration of following alcohol is:

Which of the following will produce $H_2$?