Consider the following statements and select the correct statements:
(A) The energy required to form the activated complex is known as activation energy.
(B) The Arrhenius equation explains the temperature dependence of the rate of chemical reaction.
(C) The number of collisions per second per unit volume of the reaction mixture is known as collision frequency.
(D) Lower the value of activation energy, lower will be the rate of reaction.
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Replacement of Cl of \(C _6 H _5 Cl\) to give \(C _6 H _5 OH\) occurs only in drastic conditions, but Cl of 2,4-dinitrochlorobenzene is readily replaced. This is because:

n-Hexane is obtained when glucose is

A cell is formed by combining given electrodes with \(Zn ^{2+} \mid Zn ( s )\left(E^{\circ}=-0.76 V\right)\). Arrange the following in decreasing order of \(E _{\text {cell }}^{\circ}\).
Cell Notation: \(Zn ( s ) \mid Zn ^{2+} \|\) Given electrode
(A) \(Ag ^{+} \mid Ag ( s ): E^{\circ}=+0.80 V\)
(B) \(Na ^{+} \mid Na ( s ): E^{\circ}=-2.71 V\)
(C) \(Fe ^{2+} \mid Fe ( s ): E^{\circ}=-0.44 V\)
(D) \(Cu ^{+} \mid Cu ( s ): E^{\circ}=+0.52 V\)
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Read the passage carefully and answer the Questions
Carbonyl compounds such as aldehydes, ketones, and carboxylic acids play an important role in the biochemical process of plants and animal kingdom.
Many aldehydes and ketones find applications in dye, perfumery and other industries.
The carbonyl carbon atom is \(s p^2\)-hybridized forming three sigma and one pi-bond with oxygen.
C-O bonds are polar bond due to high electronegativity of oxygen than carbon.
Hence the carbonyl carbon behaves as an electrophilic center and oxygen as a nucleophilic centre.
Primary and secondary alcohols yield aldehydes and ketones respectively upon oxidation with variety of oxidizing agents.
The boiling points of aldehydes and ketones differ from hydrocarbons and ethers.
Aldehydes and ketones undergo nucleophilic addition reaction due to presence of electrophilic carbonyl carbon.
Nucleophile and a proton add across the carbon oxygen double bond.
In polar C-O bond in carbonyl compounds, the nature of carbon and oxygen atom is

The standard potential of the cell ( \(E_{\text {cell }}^{\ominus}\) ) is related to the equilibrium constant ( \(K_C\) ) as

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Lyophobic sols like those of metals (Au, Ag, etc) are unstable and are easily precipitated by addition of electrolytes. However, it is observed that the addition of certain lyophilic colloids like gums, soaps, gelatine, etc. to lyophobic colloids (like a metal sol) render lyophobic colloids difficult to coagulate by the addition of electrolytes. The process is known as 'protection' and the lyophilic colloids are termed as Protective colloids. It is believed that the protective action of the lyophilic colloids is due to the covering up of the particles of the lyophobic colloid by those of the lyophilic colloid. smaller the gold number of a protective colloid, the greater is its protective action. purification of colloidal solution ?
Evidently, Which of the following methods cannot be used for

Arrange the following solutions in increasing order of their concentration.
(A) \(7.5 \text{ g } KCl\) (74.5 g \(mol^{-1}\)) in 100 mL solution
(B) \(3 \text{ g } Urea\) (60 g \(mol^{-1}\)) in 1 L solution
(C) \(3.6 \text{ g } glucose\) (180 g \(mol^{-1}\)) in 100 mL solution
(D) \(4 \text{ g } NaOH\) (40 g \(mol^{-1}\)) in 1 L solution
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Which one of the following is an incorrect statement about endosperm
production during double fertilization in plants?

Which of the following statement(s) is/are correct
A. A plot of \(\log \frac{x}{m}\) vs \(\log p\) is linear.
B. A plot of \(\log [x]\) vs time is linear for a first order reaction \(x \rightarrow p\).
C. A plot of vapour pressure vs temperature is linear at constant volume.
D. A plot of \(\log p\) vs \(\frac{1}{T}\) is linear at constant temperature.
E. A plot of \(\frac{1}{\text { Concentration of the reactant }}\) vs time gives a straight line for a second order reaction.
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Which of the following is the highest species-rich taxonomic group among animals?

\(\int \frac{d x}{\left(1+5 \sin ^2 x\right)}\) is equal to

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Vitamins represent a group of organic compounds which are needed in small amount for the healthy growth and maintenance of our body. These are not synthesized by the body and are supplied in the diet. The deficiency of vitamins can be supplemented with medicines. Which vitamins are water soluble ?