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(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... 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= 700mm v1 = ? v2 = 1336mL T1=273K T2= 27+273= 300k P1V1/T1 = P2V2/T2 760*V1/273 = 700*1336/300... 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/30 Mole of hydrogen = x/2 Mole fraction... 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... 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... 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 P orbital The p orbitals are dumbbell-shaped.... 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 =>... View Article

How can we relate between reducing character and basicity?

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

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