Archives

Find out the correct answer from the following and justify1. a p-orbital can accommodate upto a) 4 electrons b) six electrons c) 2 electrons d) 8 electrons

The correct answer is (b) six electrons First, let us know about p orbital The p orbitals are dumbbell-shaped. The node in the p orbital... View Article

In a room temperature, N₂ is less reactive. Explain why?

N2 is less reactive at room temperature. The bond formed between the two nitrogen atoms is a triple bond => N≡N. It is formed by sharing of... View Article

How can we relate between reducing character and basicity?

Reducing character is directly proportional to basicityReducing character is nothing but the tendency of a substance to reduce the other... View Article

How the effect of dilution on specific conductances can be explained?

The conductance of material is the property of materials due to which a material allows the flow of ions through itself and thus conducts... View Article

Give a reason for the following: a) pcl5 acts as an oxidising agent. b) dinitrogen is chemically inert.

(a)PCl5 acts as an oxidizing agent because the oxidation state of Phosphorous in PCl5 is +5. It has 2 more oxidation states than +5 ie +3 and... View Article

Account for the following: (i) pkb of aniline is more than that of methylamine. (ii) ethylamine is soluble in water whereas aniline is not. (iii) methylamine in water reacts with ferric chloride to precipitate hydrated ferric oxide. (iv) although amino group is o– and p– directing in aromatic electrophilic substitution reactions, aniline on nitration gives a substantial amount of m-nitroaniline. (v) aniline does not undergo friedel-crafts reaction. (vi) diazonium salts of aromatic amines are more stable than those of aliphatic amines. (vii) gabriel phthalimide synthesis is preferred for synthesising primary amines

(i) pkb of aniline is more than that of methylamine. Aniline undergoes resonance and as a result, the electrons on the N-atom are delocalized... View Article

On the basis of vbt explain the structure of diborane

Diborane is a colourless gas at room temperature with a repulsive, sweet odour. It adopts a D2h structure containing Four terminal and two... View Article

Which molecule has zero dipole moment in the following: (a) CH₂CI₂ (b) BF₃ (c)NF₃ (d) CIO₂

A dipole moment arises in any system in which there is a separation of charge. They can, therefore, arise in ionic bonds as well as in covalent... View Article

Represent the following compounds: HAuCl4, Tl2o, FeO, Fe2O3, CuI, CuO, MnO and MnO2 by using stock notation.

Stock notation is a system in chemical nomenclature and this indicates the oxidation state of a significant element in a compound or ion by means... View Article

Calculate the molarity of a solution of ethanol in water in which the mole fraction of ethanol is 0.040 (assume the density of water to be one).

Given A solution of ethanol in water in which the mole fraction of ethanol is 0.040 Find out We have to determine the molarity of a solution... View Article

In which of the following the hydrogen bond is strongest:(a) F-H–F (b) O-H–S (c) S-H–F (d) F-H–O

The correct answer is (a) F-H--F Hydrogen bonding refers to the formation of Hydrogen bonds, which are a special class of attractive... View Article

Explain lyophilic and lyophobic sols with examples. Why do hydrophobic sols get coagulated easily?

Based on the nature of the interaction between the dispersed phase and dispersion medium, colloids are of two types: (i) Lyophilic sols. The... View Article

The number of chiral carbon in glucose is

A chiral carbon atom is a carbon atom that is attached to four different types of atoms or groups of atoms. There are four chiral carbons in... View Article

Halogens strong oxidizing agents. Explain why?

Oxidation is a loss of electrons and the oxidizing agent is a chemical species that undergoes a chemical reaction in which it gains one or more... View Article

What is the equivalent weight of KMnO₄ in acidic, basic and neutral medium

Answer: An equivalent weight of a solution is defined as the molecular weight of the solute divided by the valence of the solute. Equivalent... View Article

Give some uses of dihydrogen

Dihydrogen is the homonuclear diatomic molecule composed of two hydrogen atoms. This molecule consists of a covalent bond between two hydrogen... View Article

Phenol is having more acidic character than alcohol. Explain why?

Phenols are much more acidic than alcohols because the negative charge in the phenoxide ion is not localized on the oxygen atom, as it is in an... View Article

Justify the statement ‘ the cleansing of soap is due to the emulsification and micelle formation’

A soap is a water-soluble compound that is made via a process called saponification by the reaction between sodium hydroxide or potassium... View Article

Predict the product formed from the reaction of formaldehyde and ammonia (a) hexamethylenetetramine (b) bakelite (c) urea (d) triethylenetetramine

When formaldehyde reacts with ammonia the product formed will be Hexamethylene tetramine. (Formaldehyde) + (Ammonia) -->... View Article

What is meant by the temporary and permanent hardness of water and how is it caused?

Hard water has high mineral content. It is formed when water percolates through the deposits of chalk and limestone which are made up of... View Article

M	T	W	T	F	S	S
		1	2	3	4	5
6	7	8	9	10	11	12
13	14	15	16	17	18	19
20	21	22	23	24	25	26
27	28	29	30