Electromeric effect is a temporary effect and comes into play instantaneously at the demand of the attacking reagent

Electromeric effect always faciliates the reaction and never inhibits

Identify the correct statements from the following Electromeric effect is a permanent effect. Hyper conjugation is a temporary effect. Fractional distillation is used to seprate two liquids from a mixture if the difference in their boiling points is less . Different compounds are adsorbed on an adsorbent to different extents. the correct answer is

Electromeric effect is the complete transfer of the shared pair of pi electrons of a multiple bond to one of the atoms in presence of the attacking reagent

Explain the terms Inductive and Electromeric effects. Which electron displacement effect explains the following correct orders of acidity of the carboxylic acids? (a) Cl_(3)C COOHgtCl_(2)CHCOOHgtClCH_(2)COOH (b) CH_(3)CH_(2)COOHgt(CH_(3))_(2)CHCOOHgt(CH_(3))_(2)C.COOH

Bond energy and orientation play a role in the determination of effectiveness of the collision. Comment.

(A) Benzaldehyde is more reactive than acetaldehyde towards nucleophilic attack. (R) The combined effect of -I and +R effects of phenyl group decreases the electron density on the carbon atom of C=O group in benzaldehyde.

Tropospheric pollution is caused by gaseous air pollutants as well as particulate polutants. Among the gaseous air pollutants, oxides of sulphur (SO_(x)) oxides of nitrogen (NO_(x)) and carbon monoxide play an important role towards pollution. Formation of acid rain and photochemical smog. green house effect and global warming all are the result of various chemical and photochemical reactions taking place in the environment. Various particulates including viable and non-viable are also responsible for causing serious air pollution. The aromatic compounds present as pariculates are

Tropospheric pollution is caused by gaseous air pollutants as well as particulate polutants. Among the gaseous air pollutants, oxides of sulphur (SO_(x)) oxides of nitrogen (NO_(x)) and carbon monoxide play an important role towards pollution. Formation of acid rain and photochemical smog. green house effect and global warming all are the result of various chemical and photochemical reactions taking place in the environment. Various particulates including viable and non-viable are also responsible for causing serious air pollution. Which of the following does not contribute towards the formation of photochemical smog ?

Tropospheric pollution is caused by gaseous air pollutants as well as particulate polutants. Among the gaseous air pollutants, oxides of sulphur (SO_(x)) oxides of nitrogen (NO_(x)) and carbon monoxide play an important role towards pollution. Formation of acid rain and photochemical smog. green house effect and global warming all are the result of various chemical and photochemical reactions taking place in the environment. Various particulates including viable and non-viable are also responsible for causing serious air pollution. Which of the following has largest concentration in acid rain ?

The instantaneous rate of an elementary chamical reactkon aA+bBhArr cC+dD can be given by rate =K_(f)[A]^(a)[B]^(b)-K_(b)[C]^(c)[D]^(d) where K_(f) and K_(b) are rate constants for forward and backward reactions respectively for the reversible reaction. If the reaction is an irreversible one, the rate is expressed as, rate =K[A]^(a)[B]^(b) where K is rate contant for the given irreversible rate of disappearance of A is a/b times the rate of disappearance of B. The variation of rate constant K with temperature is expressed in terms of Arrhenius equation: K=Ae^(-E_(a)//RT) whereas the ratio (K_(f))/(K_(b)) is expressed in terms of van't Hoff isochore: (K_(f))/(K_(b))=Ae^(-DeltaH//RT) , where E_(a) and DeltaH are energy of activation and heat of reaction respectively. The variation of rate constant K and (K_(f))/(K_(b)) with temperature shows the following effects: For endothrmic reaction when T increases then K increases and (K_(f))/(K_(b)) also increases. (ii) For endothemic reaction when T decreases then K decreases and (K_(f))/(K_(b)) also decreases. (iii) For exothermic when T increases then K and (K_(f))/(K_(b)) both increases. (iv) For exothermic reaction when T decreases then K increases and (K_(f))/(K_(b)) decrease. (v) For exothermic reaction when T increases thenK and (K_(f))/(K_(b)) both decrease.