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Ask QuestionPosted by 09 Ajay Prakash Tiwari 5 years, 5 months ago
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Posted by Laavanya ? 5 years, 5 months ago
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Yogita Ingle 5 years, 5 months ago
Krypton was discovered by Sir William Ramsay and Morris Travers
Krypton (Kr) – [Ar]3d104s24p6
Posted by Udoy Krishna 5 years, 5 months ago
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Yogita Ingle 5 years, 5 months ago
Grignard reagent should be prepared under anhydrous conditions, because it is very reactive. It reacts very quickly with any source of proton to give hydrocarbon. It reacts with water very quickly. Therefore, it is necessary to avoid moisture from the Grignard reagents.
Posted by Aman Singh 5 years, 5 months ago
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Maneesh Kumar 5 years, 5 months ago
Pawan Anjna 5 years, 5 months ago
Ashutosh Bind 5 years, 5 months ago
Posted by Chethan. B.M. 5 years, 5 months ago
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Posted by 09 Ajay Prakash Tiwari 5 years, 5 months ago
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Posted by Jas Bir 5 years, 5 months ago
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Maneesh Kumar 5 years, 5 months ago
Posted by Shadik Khan 5 years, 5 months ago
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Gaurav Seth 5 years, 5 months ago
Acetylation of glucose with acetic anhydride gives glucose petnaacetate which confirms the presence of five -OH groups.
Posted by Shadik Khan 5 years, 5 months ago
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Posted by Yuvraj Yadav 5 years, 5 months ago
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Gaurav Seth 5 years, 5 months ago
It will take 444 seconds for 5g of this reactant take to reduce to 3g
Explanation:
Expression for rate law for first order kinetics is given by:
where,
k = rate constant =
t = time for decomposition
a = initial amount of the reactant = 5 g
a - x = amount left after decay process = 3 g
Putting in the values we get:
Gaurav Seth 5 years, 5 months ago
Given that
Initial quantity, [R]o= 5 g
Final quantity, [R] = 3 g
Rate constant, k = 1.15 x 10−3 s−1
Formula of 1st order reaction,
We know that
or
Posted by Anchal Vishwakarma 5 years, 5 months ago
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Posted by Nitin Thakur 5 years, 5 months ago
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Yogita Ingle 5 years, 5 months ago
Metals are minerals or substances that form naturally below the surface of the Earth. Most metals are lustrous or shiny. Metals ate inorganic, which means they are made of substances that were never alive.
Posted by Bhavika Singh 5 years, 5 months ago
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Posted by Devmeet Shandilya 5 years, 5 months ago
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Shreyansh Yadav 5 years, 5 months ago
Posted by Sanighdha Sharma 5 years, 5 months ago
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Posted by Ayush Vishwakarma?? 5 years, 5 months ago
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Devil ? 5 years, 5 months ago
Aditya Mishra 5 years, 5 months ago
Posted by Purnima????? Tripathi?? 5 years, 5 months ago
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Abhiram Krishna.T 5 years, 5 months ago
Aditya Mishra 5 years, 5 months ago
Ayush Vishwakarma?? 5 years, 5 months ago
Posted by Mr. Badmash 5 years, 5 months ago
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Yogita Ingle 5 years, 5 months ago
Le Chatelier’s principles, also known as the equilibrium law, are used to predict the effect of some changes on a system in chemical equilibrium (such as the change in temperature or pressure). The principle is named after the French chemist Henry Louis Le Chatelier.
Le Chatelier said that equilibrium adjusts the forward and backward reactions in such a way to accept the changes affecting the equilibrium conditions.
When factors like concentration, pressure, temperature, inert gases that affect equilibrium are changed, the equilibrium will shift in that direction where the effects caused by these changes are nullified.
Le Chatelier’s principles are often used to manipulate reversible reactions in order to obtain suitable outcomes (such as an improvement in yield).
Posted by Bhavana Singh 5 years, 5 months ago
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Yogita Ingle 5 years, 5 months ago
Henry’s law
- Henry’s Law establishes aquantitative relation betweenpressure and solubility of a gasin a solvent.
- This law is for gas-liquid solution.
- According to the law at a constant temperature, thesolubility of a gas in a liquid is directly proportional to thepressure of the gas.
- It can also be stated as - The partial pressure of the gas in vapour phase (p) is proportional to the mole fraction of the gas (x) in the solution.
- Mathematically,
p = KH x where KH = Henry’s law constant.
Posted by Harjeet Singh 5 years, 5 months ago
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Gaurav Seth 5 years, 5 months ago
The concentration of sugar solution 0.1 mol/L
Explanation:
Osmotic pressure of solution = 2.46 atm
Temperature of the solution = 300 K
Concentration of the solution = c
c = 0.1 mol/L
The concentration of sugar solution 0.1 mol/L
Posted by Aditya Singh 5 years, 5 months ago
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Posted by Supriya Tiwari 5 years, 5 months ago
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Priya Dharshini ? 5 years, 5 months ago
Posted by Supriya Tiwari 5 years, 5 months ago
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Posted by Maphisabet Jeengaphs 5 years, 5 months ago
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Yogita Ingle 5 years, 5 months ago
Henry’s law states that the mass of a gas dissolved per unit volume of the solvent at a given temperature is proportional to the pressure of the gas in equilibrium with the solution.
Or
It also states that the pressure of a gas over a solution in which the gas is dissolved is proportional to the mole fraction of the gas dissolved in the solution.
In the production of carbonated beverages-in order to increase the solubility of CO2 in cold drinks,beer etc,the bottle are sealed under high pressure.When the bottle is opened under normal atmospheric pressure,the pressure inside the bottle falls to atmospheric pressure & the excess CO2 bubbles out of the bottle causing effervescence.
Posted by Maphisabet Jeengaphs 5 years, 5 months ago
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Yogita Ingle 5 years, 5 months ago
The relative lowering of vapour pressure of a solution is equal to the mole fraction of the solute. The vapour pressure of a solution of a non-volatile solute is equal to the vapour pressure of the pure solvent at that temperature multiplied by its mole fraction.
Negative deviation due to formation of Hydrogen bond between chloroform and acetone.
Posted by Maphisabet Jeengaphs 5 years, 5 months ago
- 1 answers
Gaurav Seth 5 years, 5 months ago
Q : A solution containing 18g of non-volatile non-electrolyte solute is dissolved in 200 g of water freezes at 272.07K. Calculate the molecular mass of solute. Given: Kf = 1.86 K kg/mol. freezing point of water = 273 K. 3
The solution is:
Posted by Maphisabet Jeengaphs 5 years, 5 months ago
- 2 answers
Gaurav Seth 5 years, 5 months ago
ΔTf = 0.256 K Kf = 5.12 K Kg/mol
Molality of acetic acid = 0.1 m
ΔTf = iKf x m
0.256 = i x 5.12 x 0.1
i= 0.5 = ½
Since value of Von’t Hoff facto is ½ therefore acetic acid is dimeric in nature.
Posted by Umesh Dubey 5 years, 5 months ago
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Meghna Thapar 5 years, 5 months ago
The superposition principle, also known as superposition property, states that, for all linear systems, the net response caused by two or more stimuli is the sum of the responses that would have been caused by each stimulus individually. The principle of superposition states that, when two or more waves of the same type cross at some point, the resultant displacement at that point is equal to the sum of the displacements due to each individual wave. According to the superposition principle, the response to the original stimulus is the sum (or integral) of all the individual sinusoidal responses. ... For example, in electromagnetic theory, ordinary light is described as a superposition of plane waves (waves of fixed frequency, polarization, and direction).
Posted by Maphisabet Jeengaphs 5 years, 5 months ago
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Yogita Ingle 5 years, 5 months ago
If a patient is given hypertonic solution of glucose more than 0.9% mass/ volume, the fluid balance in the human body will be disturbed with the osmosis. RBC's gets dehydrated and going to die unless the water balance is reversed. This increase of additional water in RBC's can cause high blood pressure
Meghna Thapar 5 years, 5 months ago
Hypertonic saline ranging from 3% to 7.5% is used for the therapy of hypovolemic shock, intracranial hypertension, and severe hyponatremia (see Chapter 50). It is often administered for patients with both hypovolemic shock and concerns for intracranial hypertension such as the head trauma patient. A common example of a hypotonic solution is 0.45% normal saline (half normal saline). When a patient develops diabetic ketoacidosis, the intracellular space becomes dehydrated, so the administration of a hypotonic solution helps to rehydrate the cells.
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