Arrange the steps followed during nucleophilic addition on a carbonyl group.
A. \(s p^2\) hybridised carbon of \(>C=O\) group changes to \(s p^3\) hybridised carbon
B. Nucleophile attacks the electrophilic carbon
C. Tetrahedral alkoxide ion is formed
D. Intermediate captures \(H ^{+}\)to give neutral product.
Choose the correct answer from the options given below:

The standard reduction potential \(\left(E^{\circ}\right)\) values of \(Ag ^{+}\left| Ag , K ^{+}\right| K , Mg ^{2+} \mid Mg\) and \(Cr ^{3+} \mid Cr\) are \(0.80 V,-2.93 V,-2.37 V\) and -0.74 V respectively. The decreasing order of reducing power of the following metals is:
(A)\(A g\)
(B)\(K\)
(C)\(Mg\)
(D)\(Cr\)
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Read the passage carefully and answer the questions
The carbonyl group of aldehydes and ketones is highly polar. The positively charged carbon is readily attacked by electron-rich nucleophile and the negatively charged oxygen atom is attacked by an electro-deficient electrophile. Aldehydes and ketones undergo nucleophilic addition reactions in the presence of acid or a base. The mechanism involves attack of a nucleophile on the electron deficient carbonyl carbon to form a tetrahedral intermediate. A new bond is formed between the carbon and oxygen. Protonation of the anion furnished by the reaction medium yields a neutral addition product. The addition product is same whether the reaction is catalyzed by acid or a base. For example in the presence of base aldehydes and ketones react with hydrogen cyanide to form cyanohydrin.
During nucleophilic addition reaction the carbonyl carbon undergoes a change in hybridization from:

Which of the following statements are correct?
(A) Solutions of acids, bases and salts are the examples of electrolytic conductors.
(B) Solutions of cane sugar, glycerin, alcohol are examples of non-electrolytes.
(C) Oxidation takes place at cathode while reduction takes place at anode in an electrolytic cell.
(D) Silicon and germanium are used in semiconductor devices.
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The flow of solvent from pure solvent side to solution side across a semipermeable membrane can be stopped if some extra pressure is applied on the solution. This pressure that just stops the flow of solvent is called

Match List - I with List - II.

List - I	List - II
(A) Raoult's Law	(I) \(\pi=C R T\)
(B) Henry's Law	(II) \(P=x_1 p_1^0+x_2 p_2^0\)
(C) Elevation in Boiling point	(III) \(P=K_H x\)
(D) Osmotic Pressure	(IV) \(\Delta T_b=k_b m\)

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Two isomeric compounds, A: \([\text{Co}(\text{NH}_3)_5\text{Cl}]\text{SO}_4\) and B: \([\text{Co}(\text{NH}_3)_5(\text{SO}_4)]\text{Cl}\)
can be distinguished using which of the following?

Choose the correct statement(s) for Wolff Kishner Reaction.
(A) The carbonyl group of aldehyde and ketone is reduced to CH\(_2\) group.
(B) Wolff Kishner Reaction involves potassium hydroxide and ethylene glycol
(C) The reaction is carried out at a low temperature.
(D) Hydrazine is used in this reaction.
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Cloning of alien DNA by the host involves -

Match List-I with List-II (here symbols have their usual meanings)

List-I (Physical Quantity / Law)	List-II (Formula)
(A) Snell's law	(I) \( t/\mu \)
(B) Apparent Shift	(II) \( c/v \)
(C) Refractive Index	(III) \(\frac{\mu_2}{\mu_1}\)
(D) Apparent depth	(IV) \( t(1 - \frac{1}{\mu}) \)

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Which of the following reactions has a positive \(\Delta S^{\circ}\) value?

Choose the correct statement for the collision theory of chemical reactions

Read the passage and answer the following
Microbes are organisms that cannot be seen with the naked eye. They include bacteria, archaea, protists, viruses, prions, and fungi. They account for most of the diversity of life on earth. Far more microbes inhabit a single person's body than there are people on the entire planet. Microbes also dominate in terms of their ability to live and thrive in extreme environments, including clouds, deep-sea volcanoes, springs, ice caps, and animal intestines. Most animals, including humans, exhibit numerous associations with microbes. Our "human microbiome" includes our skin, hair, mouth, and gut.
Which of the following microbe is harmful?