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How many resonance structures are possible in $O_3$?

Does magnitude means the numerical value that we use for that physical quantity?

Arrange the following alcohols in the increasing order of their acidic strength

a) 2-butanol b) methyl alcohol c) 1-propanol d) 2-methyl-2-propanol

the elevation in boiling point is explained as a colligative property of every solutions.but,for solutions showing positive deviation from raoult's law,the intermolecular attractive forces between solute-solvent molecules are weaker than those between solute- solute and solvent-solvent molecules.this can only result in a lowering of boiling point.how is this possible?

The number of geometrical isomers of

$C{H}_3-CH=CH-CH=CH-CH=CHCL$ is

Among the elements of group 17, fluorine is the most reactive owing to its:

The minimum internuclear distance is present in:

During winter season, in cold countries ethylene glycol is added to water in the car radiators. The amount of ethylene glycol to be added to 2kg of water to prevent freezing at - 3⁰c is (K_f of water = 1.85K K_g mol^-1)

Which of the following values of molecularity of a reaction is impossible?

On what topics should I focus for entrance exam of FIITJEE 2018 which is on 17th June 2018?

(I passed out class 10th and giving exams for class 11th)

Henry's law

Which of the following molecules represents the order of hybridisation $s{p}^2$, $s{p}^2$, $sp$, $sp$ from left to right?

Which of the following colligative properties can provide molar mass of proteins (or polymers or colloids) with greater precision

In which of the following compounds, keto form is more dominating than enol form?

Describe a method for the identification of primary, secondary and tertiary amines. Also write chemicla equations of the reactions involved.

A molecule has 11.11% H and 88.89% O. Its molar mass is 18u. What is the molecular formula of the compound?

Which of the following statement is not correct for the catalyst?
(a) It catalysts the forward and backward reactions to the same extent
(b) It alters$\Delta G$ of the reaction
(c) It is a substance that does not change the equilibrium constant of the reaction
(d) It provides an alternate mechanism by reducing activation energy between reactants and products

The orbital diagram in which the Aufbau principle violated is:

Which of the following has maximum number of molecules:

What is the major structure of the oxy-acid of phosphorous?

Which of the following represents the anode half-cell reaction for the following galvanic cell: $Cu\left(s\right)|C{u}^{2+}\left(aq\right)||A{g}^{+}\left(aq\right)|Ag\left(s\right)$

Which compound in each of the following pairs will react faster in $S_{N}2$reaction with $\overline{O}H$ ?

$C{H}_{3}BrorC{H}_{3}I$

$(C{H}_3{)}_{3}CClorC{H}_{3}Cl$

Which compound in each of the following pairs will react faster in $S{N}_2$reaction with $\overline{O}H$ ?

The properties of most of the ionic solids deviate from their ideal ionic character because the lattice undergoes some distortion. Cations are usually smaller than anions and have a higher effective nuclear charge. The outer electron cloud in a cation is more firmly held than in an anion. The loose electron cloud of an anion, when attracted by the electron cloud of a cation, gets distorted. This phenomenon is known as polarization. Due to this phenomenon, the electron cloud of an anion shifts towards the cation which decreases both the magnitude of positive charge on the cation and the negative charge on the anion. In other words, covalent character develops in the ionic bond.

Which of the following is an ionic compound?

In which of the following, dissociation of $N{H}_{4}OH$ will be minimised

Which statements are true out of the following :
$S_1$ : $AgI$ is less soluble in water than $AgF$ due to more polarization of $I^{-}$ in comparison to $F^{-}$ ion.
$S_2$ : The melting point of $BaC{l}_2$ is higher than the melting point of $BeC{l}_2$ due to greater ionic nature of $BaC{l}_2$.
$S_3$ : The order of hydrated radii is : $A{l}^{3+}\left(aq\right)>M{g}^{2+}\left(aq\right)>N{a}^{+}\left(aq\right)$

$S_4$: Thermal stability of alkali metal carbonates decreases down the group,

The following dihaloalkanes gives an N-(haloalkyl)phthalimide on reaction with one equivalent of the potassium salt of phthalimide. Deduce the structure of the phthalimide derivative formed:

Which of the following cannot act as Lewis base?

The correct order of wavelengths of absorption is:

Select the correct diagram for an endothermic reaction that proceeds through two steps, where the second step is rate determining:

A 2.71 g sample of KCl from the chemistry stockroom is found to be radioactive, and it is decaying at a constant rate of 4490 Bq. The decays are traced to the element potassium and in particular to the isotope ${}^{40}K$, which constitutes 1.17% of normal potassium. Calculate the half-life of this nuclide.
[Given $M_K=39.102$ g/mol, $M_{Cl}=35.453$ g/mol]

Dinucleotide is obtained by joining two nucleotides together by a phosphodiester linkage. Between which carbon atoms of pentose sugars of nucleotides are these linkages present?
(a) 5' and 3' (b) 1' and 5' (c) 5' and 5' (d) 3' and 3'

Sort out following halogens in decreasing order of their leaving capacity in $S_{N}2$ reaction

If $C_p$ and $C_V$ denotes the specific heats of unit mass nitrogen at constant pressure and volume respectively, then

Consider the following reactions & identify A, X, Y & Z

If $3.01\times {10}^{20}$ molecules are removed from $98\text{mg}$ of $H_{2}S{O}_4$, then the number of moles of $H_{2}S{O}_4$ left will be :

Melmoware are

The work done in erg for the reversible expansion of $1mole$ of an ideal gas from a volume of $10litres$ to $20litres$ at ${25}^{o}C$ is