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Cutie Pie 14 minutes ago

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Gaurav Seth 7 hours ago

CBSE Topper Answer Sheet Class 12 Chemistry

Academic Year Topper Answer Sheet
Class 12 Chemistry Topper Answer Sheet 2018 <a href="https://drive.google.com/uc?export=download&id=1rK7xoVpPVWdldC1TVJ9_XxBDj3Ue5y0m">PDF Download</a>
Class 12 Chemistry Topper Answer Sheet 2017 <a href="https://drive.google.com/uc?export=download&id=1CxGZqD9yRdtmt5AxUPDl7AtT8kEEQwF2">PDF Download</a>
Class 12 Chemistry Toppers Answer Sheet 2016 <a href="https://drive.google.com/uc?export=download&id=1FnLrtKaZesA5erWlcKWyTh4vlyIjPb7_">PDF Download</a>
Class 12 Chemistry Toppers Answer Sheet 2014 <a href="https://drive.google.com/uc?export=download&id=1Ip6_2JZvNZc3WmEOKSmmztu5jetBQ7gF">Download PDF</a>
  • 1 answers
Paramagnetic
  • 3 answers

Krishna Yadav 22 hours ago

But I didn't understand the answer starting paragraph of answer

Krishna Yadav 22 hours ago

Thnx very much

Yogita Ingle 22 hours ago

The maximum amount of solute that can dissolve in a known quantity of solvent at a certain temperature is its solubility.

The solubility of a substance depends on the physical and chemical properties of that substance. In addition to this, there are a few conditions which can manipulate it. Temperature, pressure and the type of bond and forces between the particles are few among them.

  • Temperature: By changing the temperature we can increase the soluble property of a solute. Generally, water dissolves solutes at 20° C or 100° C. Sparingly soluble solid or liquid substances can be dissolved completely by increasing the temperature. But in the case of gaseous substance, temperature inversely influences solubility i.e. as the temperature increases gases expand and escapes from their solvent.

  • Forces and Bonds: Like dissolves in like. The type of intermolecular forces and bonds vary among each molecule. The chances of solubility between two unlike substances are more challengeable than the like substances. For example, water is a polar solvent where a polar solute like ethanol is easily soluble.

  • Pressure: Gaseous substances are much influenced than solids and liquids by pressure. When the partial pressure of gas increases, the chance of its solubility is also increased. A soda bottle is an example of where CO2 is bottled under high pressure.

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  • 4 answers

Sanjana Dua 20 hours ago

Wlcm Tanya ­čą░ it's my duty to help u

Tanya Sharma ­čĺľ­čĺľ 1┬áday, 4┬áhours ago

Tq­čśŐ

Sanjana Dua 1 day, 5 hours ago

Hope it's help u ­čĺĽ

Sanjana Dua 1 day, 5 hours ago

(i) shape: octahedral Hybridisation: sp3d3 (ii) shape: trigonal bipyramidal Hybridisation: sp3d
  • 1 answers

Gaurav Seth 1 day, 6 hours ago

Given that the rate constant for a first order reaction is 60 s−1.

 

Let a M be the initial concentration. 

 

Final concentration will be 16aÔÇő M.


Rate constant, k=60/s

Time = 0.0462 sec-1

  • 1 answers

Yogita Ingle 1 day, 7 hours ago

Conductivity of a solution is defined as the conductance of a solution of 1 cm in length and area of cross-section 1 sq. cm. The inverse of resistivity is called conductivity or specific conductance. It is represented by the symbol k. If p is resistivity, then we can write:

k = 1 / p

 

Molar conductivity of a solution at a given concentration is the conductance of volume V of a solution containing 1 mole of the electrolyte kept between two electrodes with the area of cross-section A and distance of unit length.

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Akanksha Kumari 1 day, 7 hours ago

Let the mass of solution be 100 gm Mass of Benzene =30 gm Mass of CCl 4 ÔÇő =70 gm Moles of Benzene = 78 30 ÔÇő =0.385 Moles of CCl 4 ÔÇő = 154 70 ÔÇő =0.45 moles Mole fraction (Benzene) = 0.385+0.45 0.385 ÔÇő =0.461
  • 2 answers

Yogita Ingle 1 day, 7 hours ago

(i) The coordination number of an atom, ion or molecule is the number of constituent particles which touch that particular atom, atom or molecule.
(ii)
(a) in a cubic close packed structure coordination number is 12
(b) ) in a body–centered cubic structure coordination number is 8.

Sandeep Bhardwaj 1 day, 7 hours ago

The coordination number of atoms in: (a)6 (b)8
  • 1 answers

Yogita Ingle 1 day, 10 hours ago

The inert pair theory was proposed by Sidgwick. He along with Powell accounted for the shapes of several molecules and correlated the shapes with some of their physical properties.

nert pair effect is defined as The non-participation of the two s electrons in bonding due to the high energy needed for unpairing them.

  • 1 answers

Nikhil Mishra 2 days, 18 hours ago

Colour of compound will be green
  • 1 answers

Yogita Ingle 2 days, 22 hours ago

 The structure of the compound 3-Hydroxy butanal  is shown here-

  • 3 answers

Sanjana Dua 2 days, 5 hours ago

Yes, dud not waste ur in asking foolish questions use this time in ur studies with full concentration

Mr. Badmash 2 days, 18 hours ago

Don't waste your time in asking these types of questions.. instead of it , use your time in studies. definitely you can do it easily..­čśî­čĄŚ­čĄŚ­čĄŚ­čśî­čśî

Rashi Singh 2 days, 23 hours ago

Be determined toward your study Definitely u will pass
  • 4 answers

Tanisha Yadav 2 days, 5 hours ago

Wlcm Akanksha

Akanksha Kumari 2 days, 8 hours ago

Thanks TanishaÔś║´ŞĆÔś║´ŞĆ

Shree Ram Faujdar 2 days, 21 hours ago

What is phosphogen??

Tanisha Yadav 3 days, 1 hour ago

Carbonyl dichloride
  • 2 answers

Shweta­čśÇ Dhama­čśŹ 2┬ádays, 18┬áhours ago

Physical┬áabsorption ┬áis essentially┬áexothermic. The reaction of gases with the surface layer of solids may, however, lead to the formation of endothermic compounds. Chemisorption, therefore, may have an┬áendothermic character....hope so it helps u....Ôś║

Tanya Sharma ­čĺľ­čĺľ 3┬ádays, 6┬áhours ago

During this process the residual forces on the surface of adsorbent decreases which in turn decreases the surface energy. This energy appears in the form of heat, hence adsorption is exothermic in nature...
  • 2 answers

Yogita Ingle 3 days, 7 hours ago

The dialysis is a separation process that depends on the differential transport of solutes of different sizes across a porous barrier separating two liquids when the driving force is a concentration gradient only. It is usually used to separate solutes too large to diffuse through the barrier from those small enough to diffuse freely through it. The ultrafiltration, sometimes called reverse osmosis, is a more complicated process in that the solvent and solutes up to a certain critical size are forced through the barrier by considerably higher pressure on one side of the porous barrier than on the other. Thus, there is always a flow of solvent moving through the barrier in the same direction as the smaller solutes that are able to pass through the membrane. This sets it apart from dialysis where, owing to osmosis, there is usually a certain net movement of solvent in the direction opposite to the movement of solute.

Gaurav Seth 3 days, 7 hours ago

Dialysis is a clinical application that helps patients to clean their blood artificially while the ultrafiltration is a process that occurs naturally during the urine formation in our kidneys. Furthermore, in dialysis, solutes move from high concentration to low concentration along the electrochemical gradient. But in ultrafiltration, the substances travel due to a pressure gradient. Hence, this is another difference between dialysis and ultrafiltration. Moreover, dialysis occurs in a dialyzer or the membrane lining of our abdomen while ultrafiltration takes place between the glomerulus and the Bowman’s capsule of the nephron.

Furthermore, the rate of ultrafiltration depends on the porosity of the membrane and the speed of blood flow (or the pressure created by the blood flow) while the dialysis rate depends on the dialysate flow rate. Thus, this is also a difference between dialysis and ultrafiltration.

  • 1 answers

Yogita Ingle 3 days, 6 hours ago

The metal-carbon bonds in metal carbonyls have both σ and π characters. A σ bond is formed when the carbonyl carbon donates a lone pair of electrons to the vacant orbital of the metal. A π bond is formed by the donation of a pair of electrons from the filled metal d orbital into the vacant anti-bonding π orbital (also known as back bonding of the carbonyl group). The σ bond strengthens the π bond and vice-versa. Thus, a synergic effect is created due to this metal-ligand bonding. This synergic effect strengthens the bond between CO and the metal.

  • 1 answers

Gaurav Seth 3 days, 9 hours ago

The Cl-,Br- and CN- nucleophiles can easily be introduced in the benzene in the presence of Cu(I) ion. This reaction is called sand Meyer's reaction.

It is used to synthesize aryl halides from aryl diazonium salts. It is an example of a radical-nucleophilic aromatic substitution.

When a primary aromatic amine, dissolved or suspended in cold aqueous mineral acid, is treated with sodium nitrite, a diazonium salt is formed. Mixing the solution of freshly prepared diazonium salt with cuprous chloride or cuprous bromide results in the replacement of the diazonium group by −Cl or −Br.


  • 1 answers

Akanksha Kumari 3 days, 3 hours ago

It is very easy to learn chemistry if u r interested Dude just read ncert book it helps u a lot And watch videoes if u have any doubt
  • 4 answers

Shristi Jaglan 2 days, 20 hours ago

Sanitizer is non metal

Sree Ramana 2 days, 21 hours ago

How it can be said that sanitizer is non-metal?

Shree Ram Faujdar 2 days, 23 hours ago

How non metal??­čśů

Anushka Chahar 3 days, 20 hours ago

Non metal

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