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The order of reactivity of the following alkyl halides for an SN² reaction is

$C{O}_2+H_{2}O\rightleftharpoons$ ?

A near ultraviolet photon of 300 nm is absorbed by a gas and then remitted as two photons. One photon is red with wavelength of 760 nm. What would be the wave number of the second photon?

At the isoelectric point for an amino acid, the species present are:

The shape of covalent molecule $M{X}_3$ is

The Fischer presentation of D-glucose is given below

The correct structure(s) of $\beta -L-glucopyranoseis\left(are\right)$

For a 0.01 M solution of carbonic acid, the concentration of $C{O}_3^{2-}$ would be:

Given: pH of the solution is 4.18.

$K_{a1}for{H}_{2}C{O}_3=4.45\times {10}^{-7}$

$K_{a2}for{H}_{2}C{O}_3=4.69\times {10}^{-11}$

Take ${10}^{-4.18}=6.6\times {10}^{-5}$

Suppose you have to determine the percentage of carbon dioxide in a sample of a gas available in a container. Which of the following is the best absorbing material for the carbon dioxide?

If an electron has a wavelength $\lambda$ and it has an uncertainty in its kinetic energy equal to $\Delta E$, then what will be uncertainty in its position?

Of the following the formula which represents a saturated cyclic compound is

For an ideal gas, consider only P-V work in going from an initial state X to the final state Z . The final state Z can be reached by either of the two paths shown in the figure. Which of the following choice(s) is(are) correct?

[Take $△S$ as change in entropy and $w$ as work done]

Which of following reactions produce(s) propane as a major product?

What do we mean by radius ratio?

Atmospheric pollution is generally studied as:

Tetragonal
crystal system has the following unit cell dimensions

[MP PMT 1993]

Which of the following is cyanide process?

Calculate the entropy change accompanying the following change of state

$5mol$ of $O_2({27}^{\circ }C,1atm)\to 5mol$ of $O_2({117}^{\circ }C,5atm)$

$C_P$ for $O_2=6.95calde{g}^{-1}mo{l}^{-1}$

Calcium is obtained by

The enthalpies of atomization of $C{H}_4\left(g\right)$ and $C_2{H}_6\left(g\right)$ are respectively $400kJmo{l}^{-1}$ and $670kJmo{l}^{-1}.$ The value of $△H_{C-C}$ would be

Melmoware are

Find out incorrect order of the dipole moment among the following pairs of compound:

For the reaction $H_2$ (g) + $I_2$ (g) $\leftrightharpoons$ 2HI(g)the equilibrium constant $K_p$ changes with

An ion has electronic configuration $\left[Kr\right]4d^4$ placed in group 6 in the modern periodic table. The ion is:

The sodium test, or Lassaigne’s test, is used in an elemental analysis of the qualitative determination of the presence of foreign elements, namely halogens, nitrogen, sulphur and phosphorus in an organic compound.

The test involves heating the sample strongly with a clean sodium metal, ‘fusing’ it with the sample. The ‘fused’ sample is then plunged into water, and the usual qualitative tests are performed on the resultant solution for the respective possible constituents.

Which of the following compounds will give negative Lassaigne’s test for nitrogen?

Calculate the oxidation number of Chlorine $\left(Cl\right)$ in

$Ca(Cl{O}_2{)}_2$

Statement I F -atom has a less negative electron affinity than Cl-atom.

Statement II Additional electrons are repelled more effectively by 3p-electrons in Cl-atom than by 2p-electrons in F-atom.

Among the given free radical bromination reactions, the reaction(s) in which $3^{\circ }$ halide is a major product is /are :

Cloud is an example of

Which of the following has the highest ionic mobility in an aqueous solution?

1 g charcoal adsorbs 100 ml of 0.5 M $C{H}_{3}CHOOH$ to form a monolayer. As a result molarity of acetic acid reduces to 0.49 M. What will be the surface area covered by each molecule of acetic acid? Given that surface area of charcoal $=3.01\times {10}^2{m}^2/g$.

The ionization energy of an element is

Arrange the following in an increasing order of strengths of oxidizing powers of the following:

Given

$N{O}_2^{-}+H_{2}O\leftrightharpoons HN{O}_2+O{H}^{-}$, $K_b=2.22\times {10}^{-11}$

Thus, the degree of hydrolysis of 0.04 $M$ $NaN{O}_2$ solution is:

Assuming complete ionisation, same moles of which of the following compounds will require the least amount of acidified $KMn{O}_4$ for complete oxidation?

The correct order of boiling points of boron trihalides is:

Which of the following compounds is expected to be coloured? (Atomic numbers are given as: $[Ag=47,Cu=29,Mg=12]$)

Which one of the following is not
represented by sols [MP PMT 1992]

The ionization energy of $F^{-}$ is 320 kJ/mole. The electron gain enthalpy of fluorine would be?