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Which of the alkali metal chloride $\left(MCl\right)$ forms its dihydrate salt $\left(MCl.2H_{2}O\right)$ easily ?

Which is the stable form of the given carbocation after rearrangement?

Which of the following hydrides of group 15 has maximum basic character?

Which of the following gives on ozonolysis both aldehydes and ketones?

An electron in an atom undergoes transition in such a way that its kinetic energy changes from $x$ to $\frac{x}{4}$. The change in potential energy will be:

Of the following reactions

(i) A $\rightleftharpoons$ B $\Delta$D G${}^0$ = 250 kJ mol${}^{-1}$

(ii) D $\rightleftharpoons$ E $\Delta$ D G${}^0$ = -100 kJ mol${}^{-1}$

(iii) F $\rightleftharpoons$ G $\Delta$ D G${}^0$ = -150 kJ mol${}^{-1}$

(iv) M $\rightleftharpoons$ N $\Delta$ D G${}^0$ = 150 kJ mol${}^{-1}$

the reaction with the largest equilibrium constant is

The maximum number of elements present in seventh period of the modern periodic table is:

Hydrogenation of benzoyl chloride in the presence of Pd supported on $BaS{O}_4$ gives

What number should be added to $x^2+6x$ to make it a perfect square?

Pyrite ($Fe{S}_2$), crystallizes in a cubic unit cell with a cell edge of $0.540\text{nm}$. The density of pyrite is $5.02{\text{g/cm}}^3$. How many $F{e}^{2+}$ and $S_2^{2-}$ ions are present in a single unit cell? ($S=32\text{u},Fe=56\text{u}$)

Find the enthalpy of formation of Hydrogen flouride on the basis of following data :
Bond energy of $H-H=434kJmo{l}^{-1}$
Bond energy of $F-F=158kJmo{l}^{-1}$
Bond energy of $H-F=565kJmo{l}^{-1}$

The standard redox potentials $E^0$ of the following system are

$I.Mn{O}_4^{-}+8H^{+}+5e^{-}\to M{n}^{2+}+4H_{2}O{E}^0=1.5V$

$II.S{n}^{2+}\to S{n}^{4+}+2e^{-}{E}^0=-0.15V$

$III.C{r}_2{O}_7^{2-}+14H^{+}+6e^{-}\to 2C{r}^{2+}+7H_{2}O{E}^0=1.33V$

$IV.C{e}^{3+}\to C{e}^{4+}+e^{-}{E}^0=-1.61V$

The oxidizing power of the various species are related as

$\begin{array}{ccc}Isotope& RelativeAbudance\left(\%\right)& AtomicMass\left(amu\right)\\ {}^{12}C& 98.892& 12\\ {}^{13}C& 1.108& 13.00335\\ {}^{14}C& 2\times {10}^{-10}& 14.00317\end{array}$

From the data given in the table, calculate the average atomic mass of C

Suppose,
we think of fission of a
nucleus
into two equal fragments,.
Is the fission energetically possible? Argue by working out Q
of
the process. Given

and.

An element has a bcc structure having unit cells $12.08\times {10}^{23}$. Find the total number of atoms in these unit cells.

The colour of the coordination compounds depends on the crystal field splitting. What will be the correct order of absorption of wavelength of light in the visible region, for the complexes, $\left[Co\right(N{H}_3{)}_6{]}^{3+},\left[Co\right(CN{)}_6{]}^{3-},\left[Co\right(H_{2}O{)}_6{]}^{3+}$
$\left[Co\right(N{H}_3{)}_6{]}^{3+},\left[Co\right(CN{)}_6{]}^{3-},\left[Co\right(H_{2}O{)}_6{]}^{3+}$
(a) $\left[Co\right(CN{)}_6{]}^{3-}>\left[Co\right(N{H}_3{)}_6{]}^{3+}>\left[Co\right(H_{2}O{)}_6{]}^{3+}$
(b) $\left[Co\right(N{H}_3{)}_6{]}^{3+}>\left[Co\right(H_{2}O{)}_6{]}^{3+}>\left[Co\right(N{H}_3{)}_6{]}^{3+}$
(c) $\left[Co\right(H_{2}O{)}_6{]}^{3+}>\left[Co\right(N{H}_3{)}_6{]}^{3+}>\left[Co\right(CN{)}_6{]}^{3-}$
(d) $\left[Co\right(CN{)}_6{]}^{3-}>\left[Co\right(N{H}_3{)}_6{]}^{3+}>\left[Co\right(H_{2}O{)}_6{]}^{3+}$