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Ask QuestionPosted by Dgf Chd 4 years ago
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Posted by Dgf Chd 4 years ago
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Yogita Ingle 4 years ago
Elements whose f orbital getting filled up by electrons are called f block elements. These elements have electrons, (1 to 14) in the f orbital, (0 to 1) in the d orbital of the penultimate energy level and in the outermost’s orbital. The general outer electronic configuration of f block elements is (n−2)f(0−14)(n−1)d(0−1)ns2.
Posted by Dgf Chd 4 years ago
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Yogita Ingle 4 years ago
Elements whose f orbital getting filled up by electrons are called f block elements. These elements have electrons, (1 to 14) in the f orbital, (0 to 1) in the d orbital of the penultimate energy level and in the outermost’s orbital. The general outer electronic configuration of f block elements is (n−2)f(0−14)(n−1)d(0−1)ns2.
Posted by Dgf Chd 4 years ago
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Yogita Ingle 4 years ago
Elements whose f orbital getting filled up by electrons are called f block elements. These elements have electrons, (1 to 14) in the f orbital, (0 to 1) in the d orbital of the penultimate energy level and in the outermost’s orbital. The general outer electronic configuration of f block elements is (n−2)f(0−14)(n−1)d(0−1)ns2.
Posted by Dgf Chd 4 years ago
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Yogita Ingle 4 years ago
D block elements are the elements which can be found from the third group to the twelfth group of the modern periodic table. The valence electrons of these elements fall under the d orbital. D block elements are also referred to as transition elements or transition metals. The general outer electronic configuration of d block elements is (n−1)d(1−10)ns(0−2).
Posted by Dgf Chd 4 years ago
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Posted by Faizan Ali 4 years ago
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Yogita Ingle 4 years ago
Coordination number is the number of nearest neighbors with which a given atom is in contact. In an ionic crystal, the coordination number of an ion refers to the number of oppositely charged ions that surround that ion.
Posted by Anupam Awasthi 4 years ago
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Yogita Ingle 4 years ago
Density of solution =
Density of ethanol (solute)=
Molar mass of ethanol (solute) = 46.07 g/mole
20 % aqueous ethanol solution by volume means that the 20 ml of ethanol is present in the 100 ml of solution.
So, the volume of solution = 100 ml
Volume of ethanol (solute) = 20 ml
First we have to calculate the mass of solution.
Now we have to calculate the mass of solute, ethanol.
Now we have to calculate the mass of solvent.
Now we have to calculate the molarity of solution.
Now we have to calculate the molality of solution.
Therefore, the molarity and molality of solution is, 3.425 mole/L and 4.269 mole/Kg respectively.
Posted by Jahnavi Laller 4 years ago
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Riya Mahapatra 4 years ago
Posted by Vishal Khandelwal 4 years ago
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Posted by Anjali Sharma 4 years ago
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Yogita Ingle 4 years ago
The Van’t Hoff factor offers insight on the effect of solutes on the colligative properties of solutions. It is denoted by the symbol ‘i’. The Van’t Hoff factor can be defined as the ratio of the concentration of particles formed when a substance is dissolved to the concentration of the substance by mass.
The extent to which a substance associates or dissociates in a solution is described by the Van’t Hoff factor. For example, when a non-electrolytic substance is dissolved in water, the value of i is generally 1. However, when an ionic compound forms a solution in water, the value of i is equal to the total number of ions present in one formula unit of the substance.
Posted by Tanya ?? 4 years ago
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Priyanshu Kumar 4 years ago
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Vikas Kaushik 4 years ago
Posted by Baliyan ? 4 years ago
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Posted by Ayush Kumar 4 years ago
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Posted by Baliyan ? 4 years ago
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Swadha Mishra 4 years ago
Swadha Mishra 4 years ago
Gaurav Seth 4 years ago
Aldehydes having αhydrogen undergo self condersation on warming with dilute or mild base to give p-hydroxy aldahydes called aldols. This reaction is called aldol condersation
Posted by Baliyan ? 4 years ago
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Yogita Ingle 4 years ago
Sodium potassium tartrate is a double salt of tartaric acid with a chemical formula C4H4O6KNa·4H2O. It is also known as Rochelle salt or Potassium sodium tartrate.
It is a colourless to white crystalline powder with a cool and saline taste. It has a pH value of 6.5 – 8.5. It has a large piezometric effect which makes it widely useful in sensitive vibrational and acoustic devices.
Posted by Baliyan ? 4 years ago
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Yogita Ingle 4 years ago
Fehling’s solution is a deep blue alkaline solution which is used to identify the presence of aldehydes or groups that contain any aldehyde functional group -CHO and in addition with Tollen’s reagent to differentiate between reducing and non-reducing sugars. Fehling’s solution is also used to differentiate a ketone group and water-soluble carbohydrates.
Posted by Aryan Malik 4 years ago
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Posted by Baliyan ? 4 years ago
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Yogita Ingle 4 years ago
Sulphur sol and gold sol are Lyophobic sols and are unstable and are build to colloidal size from small particles by the Condensation method by Chemical reactions.
Oxidation sulphur sol is prepared by passing H2S into SO2
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H2S + SO2 → S (sol) + H2O
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Reduction of AuCl3 with formaldehyde gives gold sol.
AuCl3+ HCHO + 3H2O → Au (sol) + 3HCOOH + 6HCl
Posted by Hetav Panchal 4 years ago
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Gaurav Seth 4 years ago
Magnetic separation: This method is based on the magnetic and non-magnetic properties of the ore components
- Magnetic Separation: - This method is based on differences in magnetic properties of the ore components. If either the ore or the gangue (one of these two) is capable of being attracted by a magnetic field, then such separations are carried out (e.g., in case of iron ores). The ground ore is carried on a conveyer belt which passes over a magnetic roller.
Posted by Namandeep Gupta 4 years ago
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All Rounder Mkjha 4 years ago
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Yogita Ingle 4 years ago
Aniline is an aromatic amine and it has a benzene ring which is electron withdrawing in nature. Because of this, the lone pair of electrons on nitrogen is not readily available for donation, as it is involved in the resonance. whereas methylamine is an aliphatic amine and the methyl group is electron donating in nature so the lone pair of nitrogen in methylamine is easily available for donation because there is no resonance in methyl amine.Thus methyl amine is more basic than aniline.
Posted by Baliyan ? 4 years ago
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Abhijeet Pratap Singh 4 years ago
Yogita Ingle 4 years ago
Aldehydes: Aldehydes are the organic compounds in which carbonyl group is attached to one hydrogen atom and one alkyl or aryl group.
Posted by Prachi Rajput 4 years ago
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Yogita Ingle 4 years ago
i. Macromolecular sol: They are molecules of large size having high molecular masses. Due to long chain, the vander waal's forces are stronger, e.g., rubber, nylon etc.
ii. Peptization is the process responsible for the formation of stable dispersion of colloidal particles in dispersion medium. In other words, it may be defined as a process of converting a precipitate into colloidal sol by shaking it with dispersion medium in the presence of small amount of electrolyte.
iii. Emulsion is a fine dispersion of minute droplets of one liquid in another in which it is not soluble or miscible, e.g. milk.
Posted by Kirti Sharma? 4 years ago
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Posted by Lalit Kumar 4 years ago
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Posted by Sneha Kakadiya 4 years ago
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Meghna Thapar 4 years ago
The reaction of aldehydes and ketones with ammonia or 1º-amines forms imine derivatives, also known as Schiff bases (compounds having a C=N function). Water is eliminated in the reaction, which is acid-catalyzed and reversible in the same sense as acetal formation. Two of the more important derivatives of ammonia are hydrazine and hydroxylamine. In strongly acidic medium ammonia derivatives being basic will react with acids and will not react with carbonyl compound. In basic medium, OH will attack carbonyl group. Hence pH of a reaction should be carefully controlled.
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Yogita Ingle 4 years ago
The resonating structures of nitrate ion NO3- are:
Bond order of NO bond is = 4/3 = 1.33
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