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8g of a metal hydroxide on heating produces 5g of metal oxide. If the atomic mass of the metal is 7, the formula of its chloride is ?

As a result of Millikan's oil drop experiment, value of electronic charge was found to be approximately equal to:

(* is 13C-labelled carbon)



In the above reaction, E, F and G respectively are:

Q17. Consider the following Statements regarding National Institute of Hydrology:

1. It is under Ministry of Water Resources, River Development & Ganga Rejuvenation.

2. The Institute has its headquarters at Kochi, Kerala.

Identify the correct statements:

Element with the electronic configuration as $[Ar{]}^{18}3d^{5}4s^1$ is placed in

Threshold frequency of metal is $f_0$. When light of frequency $\theta$ = $2f_0$ is incident on the metal plate, velocity of electron emitted in $V_1$. When a frequency of incident radiation is $5f_0.V_2$ is velocity of emitted electron, then $V_1:V_2$ is

What is the maximum number of emission lines when the excited electron of an H atom in n = 6 drops to the ground state?

CsBr crystal has bcc structure. It has an edge length of $4.3\stackrel{\circ }{A}$. The shortest interionic distance between $C{s}^{+}$ and $B{r}^{-}$ ions is

Which of the following compounds has the lowest $p{K}_a$?

Calculate the ratio of energies of $H{e}^{+}$ for $1^{st}$ & $2^{nd}$ excited state.

The predominant product formed, when 3-methyl-2-pentene reacts with HOCl, is

Find the osmotic pressure of $0.05\text{M}$ solution of urea at ${27}^{\circ }C$

$\text{Molecular formula of urea is}\left(C{H}_4{N}_{2}O\right)$

Which of the following reaction is the best choice for preparing methyl cyclohexyl ether?

The unit cell cube length for $LiCl$ $\left(NaCl\text{like structure}\right)$ is $5.14\stackrel{o}{A}.$ Assuming anion-anion is in contact, the ionic radius for chloride ion will be-

Which of the following is true for a binary immiscible solution?

$P_A^0$ is the vapour pressure of component A in pure state

$P_B^0$ is the vapour pressure of component B in pure state

$n_X$ are number of moles of component ‘X’ present in the vapour phase

The ionization enthalpy of hydrogen atom is $1.312\times {10}^{6}Jmo{l}^{-1}$. The energy required to excite the atom from n = 1 to n = 2 is:

The maximum number of electrons that can have principal quantum number, $n=4$ and spin quantum number, $m_s=-\frac{1}{2}$ is:

The Ionisation energy of Li is 520 kJ $mo{l}^{–1}$. The amount of energy required to convert 140 mg of Li atoms into gaseous $L{i}^{+}$ ions is:

Which bond is longer in general...single bond , double bond , triple bond.?

the carbon-halogen bond has got to be broken because that gets easier as you go from fluoride to chloride to bromide to iodide, the compounds get more reactive in that order. Why then does the boiling point also increase shouldn't they decrease if its easier to break the bonds like for there reactivity.