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Using Mulliken-barker test how the nitro group is detected?

Answer: Mulliken barker test is used for the detection of the mono nitro group in our compound. -NO2 is reduced to -NHOH ie hydroxylamine group... View Article

Dinitrogen and dihydrogen react with each other to produce ammonia according to the following chemical equation: N2(g) + 3H2(g) →2NH3(g) (i) calculate the mass of ammonia produced if 2.00 × 10^3 g dinitrogen reacts with 1.00 × 10^3 g of dihydrogen. (ii) will any of the two reactants remain unreacted? if yes which one ?(iii) what would be its mass?

Dinitrogen and dihydrogen react with each other to produce ammonia N2(g) + 3H2(g) →2NH3(g) 28g 6g 34g 28 g of N2 reacts... View Article

Briefly explain why is sigma bond stronger than pi bond?

This type of covalent bond is formed by the end to end (head-on) overlap of bonding orbitals along the internuclear axis. This is called as... View Article

Calculate the total mass of 1 mole of electrons.

A mole is defined as the amount of a substance that contains exactly 6.02214076 x 1023 ‘elementary entities’ of the given substance. The number... View Article

Primary amines have a higher boiling point then tertiary amines .justify the statement

Amines are one of the most significant classes of organic compounds which are derived by replacing one or more hydrogen atoms with an alkyl or... View Article

Find out the mole fraction of solute in an aqueous solution of 30% NaOH

The mole fraction of any component of a solution is defined as the ratio of the number of moles of that component present in the solution to the... View Article

Predict the conjugate acids for the following brönsted bases: NH2⁻, NH₃ and HCOO⁻

The members of which can be formed from each other mutually by the gain or loss of protons are called conjugate acids and bases pairs. The... View Article

(i) distinguish between flux and slag. (ii) which metals are generally extracted by the electrolytic processes? what positions these metals generally occupy in the periodic table?

(i) Flux and slag Flux is the material or substance that is added to molten metals to bond with impurities that can be readily removed whereas... View Article

4.215 g of a metallic carbonate was heated in a hard glass tube and the co2 evolved was found to measure 1336 ml at 27oc and 700 mm pressure. what is the equivalent weight of the metal?

p1= 760mm p2= 700mmv1 = ? v2 = 1336mLT1=273K T2= 27+273= 300kP1V1/T1 = P2V2/T2760*V1/273 = 700*1336/300V1= 7*1336*273/3*760=1119.7mL =... View Article

Equal weights of ethane and hydrogen are mixed in an empty container at 25°c. the fraction of the total pressure exerted by hydrogen is a. 1 : 2 b. 1 : 1 c. 1 : 16 d. 15 : 16

Let x g of each gas is mixed.Mole of ethane = x/30Mole of hydrogen = x/2Mole fraction of hydrogen = (x/2)/(x/2 + x/30)= 15/16 ⇒ (Partical... View Article

Why electron can not exist in nucleus of an atom?

Electrons are having a negative charge and if they can exist in the nucleus they will be neutralised by the positive charges. By applying... View Article

Calculate the number of atoms in each of the following (i) 52 moles of Ar (ii) 52 u of He (iii) 52 g of He.

Answer:To calculate the number of atoms in a formula, the weight of a sample, its atomic mass from the periodic table and a constant known as... View Article

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