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The properties of the solutions which depend only on the number of solute particles but not on the nature of the solute are called colligative properties. Relative lowering in vapour pressure is also an example ofcolligative properties. For an experiment, sugar solution is prepared for which lowering in vapour pressure was found to be 0.061 mm of Hg. (Vapour pressure of water at 200C is 17.5 mm of Hg) The following questions are multiple choice questions. Choose the most appropriate answer: (i) Relative lowering of vapour pressure for the given solution is (a) 0.00348 (b) 0.061 (c) 0.122 (d) 1.75 (ii) The vapour pressure (mm of Hg) of solution will be (a) 17.5 (b) 0.61 (c) 17.439 (d) 0.00348 (iii) Mole fraction of sugar in the solution is (a) 0.00348 (b) 0.9965 (c) 0.061 (d) 1.75 or If weight of sugar taken is 5 g in 108 g of water then molar mass of sugar will be (a) 358 (b) 120 (c) 240 (d) 400 (iv) The vapour pressure (mm of Hg) of water at 293K when 25g of glucose is dissolved in 450 g of water is (a) 17.2 (b) 17.4 (c) 17.120 (d) 17.02

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Explain the significance of photosynthesis write the balance chemical equation involved in this

Posted by Zakiya Ansari 1 year, 5 months ago

CBSE > Class 12 > Chemistry

1 answers

Mahesh Lovely 1 year, 5 months ago

The process of photosynthesis is commonly written as: 6CO2 + 6H2O → C6H12O6 + 6O2. This means that the reactants, six carbon dioxide molecules and six water molecules, are converted by light energy captured by chlorophyll (implied by the arrow) into a sugar molecule and six oxygen molecules, the products.

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What type of solution is formed by mixing equal volumes of n-hexane and n-heptane or bromoethane and chloroethane or benzene and toluene? explain

Posted by Monisha Malgotra 1 year, 5 months ago

CBSE > Class 12 > Chemistry

1 answers

Kirti Bhatt 1 year, 5 months ago

Ideal solution

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Vedhyut rasaynik cell evam vedhyut Apghtni cell me Antar

Posted by Usha Semwal Usha Semwal 1 year, 5 months ago

CBSE > Class 12 > Chemistry

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Phenol do not undergo substitution of the OH-group like alcohols. explain

Posted by Smitha Anoop 1 year, 5 months ago

CBSE > Class 12 > Chemistry

1 answers

Sharan M 1 year, 4 months ago

Because of partial double bond between c and oh

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Calculate the mobility of a solution when 20 g of any awake is dissolved in H2 gas of solvent

Posted by Mehul Sharma 1 year, 5 months ago

CBSE > Class 12 > Chemistry

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Explain hypertonic and hypotonic solution

Posted by Manashree Chakravarty 1 year, 5 months ago

CBSE > Class 12 > Chemistry

1 answers

Kirti Bhatt 1 year, 5 months ago

If a solution has more osmotic pressure than any other solution is called hypertonic solution If a solution has less osmotic pressure than any other solution is called hypotonic solution

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The freezing point depression of 0.1 molal solution of benzoic acid in benzene is 0.256 K. For benzene kf is 5.12 K kg/mol. Calculate the value of Vant Hoff factor for benzoic acid in benzene. What conclusion can you draw about the molecular state of benzoic acid in benzene.

Posted by Sneha Kaushik 1 year, 6 months ago

CBSE > Class 12 > Chemistry

1 answers

Tani Gupta 1 year, 6 months ago

i=0.05 and as i<1, it shows that the particles have associated

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What is azeotrope

Posted by Manashree Chakravarty 1 year, 6 months ago

CBSE > Class 12 > Chemistry

1 answers

Tani Gupta 1 year, 6 months ago

Azeotropes are defined as the mixture of liquids which boil at constant temperature like a pure liquid and posses same composition of components in liquid as well as in vapour phase .

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what is entropy

Posted by Anshika Namdev 1 year, 6 months ago

CBSE > Class 12 > Chemistry

1 answers

Tani Gupta 1 year, 6 months ago

Randomness of particles while mixing . Delta S mix is always positive in solutions either it is ideal solution or non-ideal solution (-ve and +ve deviation)

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Make project on brass analysis

Posted by Ruhi Nayak 1 year, 6 months ago

CBSE > Class 12 > Chemistry

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Posted by Aman Kashyap 1 year, 6 months ago

CBSE > Class 12 > Chemistry

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ANSWER

What is positive & negative deviation in RLVP ?

Posted by Bobby Gupta 1 year, 6 months ago

CBSE > Class 12 > Chemistry

2 answers

Tani Gupta 1 year, 6 months ago

The solution which does not follow Raoult's law is called non ideal solution. Non ideal solutions show positive and negative deviations. The solution whose actual vapour pressure is greater than the expected vapour pressure shows positive deviation and the solution whose actual vapour pressure is lower than the expected vapour pressure shows negative deviation.

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Anshika Namdev 1 year, 6 months ago

which solution do not obey raoults law,enthalpy of mixture and volume of mixture is not zero

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A solution have 46% w/w ethylene alochal (C2H5OH) in water find the mole fraction of ethyl alcohal

Posted by Shivangi Arya 1 year, 6 months ago

CBSE > Class 12 > Chemistry

3 answers

Tani Gupta 1 year, 6 months ago

Xb= 1/4, Xa=3/4

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Arpit Agnihotri 1 year, 6 months ago

46%(w/w) C2H5OH = 46 gram of C2H5OH (solute) present in 100 gram of solution(solvent:water) mole fraction = (mole of solute)/ (mole of solute + mole of solvent) so, mole fraction of C2H5OH = [46/(2*12+6*1+1*16]/[{46/(2*12+6*1+1*16}+{54/2*1+1*16}] = [46/46]/[{46/46}+{54/18}] = 1/[1+3] = 1/4 hence, ans : mole fraction of C2H5OH = (1/4) molar mass of: C - 12; H - 1; O - 16 mole = mass / molar mass

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Deepam Rawat 1 year, 6 months ago

.25 of ethylene gycocol

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In mixture having 40g NaOH and 54g H2O find the mole fraction of mixture

Posted by Shivangi Arya 1 year, 6 months ago

CBSE > Class 12 > Chemistry

3 answers

Arpit Agnihotri 1 year, 5 months ago

total weight of solution(NaOH+H20) = 40+54 = 94 mole = mass/molar mass the molar mass of Na =40; O =16;H=1 mole fraction = mole of substance to be founded/mole fraction of solution now, mole fraction of NaOH = moles of NaOH/ (Mole of NaOH+Mole of H2O) = (40/40)/[(40/40)+(54/1*2+16*1)] = 1/[1+3] = 1/4 so, mole fraction of NaOH in the solution = 1/4 mole fraction ( solute+solvent) = 1 therefore mole fraction of H2O = 1-(1/4) mole fraction of H2O=3/4

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Rohit 1 year, 6 months ago

1/4

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Anshul Pratap Singh 1 year, 6 months ago

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CH3CH2CH2CH3 CI/UV light --->>CH3CH2CH2CH2Cl + CH3CH2CHClCH3 What would be major and minor product in this reaction?

Posted by Bibek Chakraborty 1 year, 6 months ago

CBSE > Class 12 > Chemistry

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What i electrolytes?

Posted by Abhik Sarkar 1 year, 6 months ago

CBSE > Class 12 > Chemistry

1 answers

Anshul Pratap Singh 1 year, 6 months ago

Electrolyte are those which dissociate into their ions Ex NaCl . Na+ ,Cl-

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An aqueous solution contain 5 percent and 10 percent of urea and glucose respectively btao wt. If kF for water is 1.86, the FP of the solution is

Posted by Ujjwal Raj 1 year, 6 months ago

CBSE > Class 12 > Chemistry

1 answers

Ujjwal Raj 1 year, 6 months ago

glucose respectively by* wt

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Difference between homogeneous mixture and heterogeneous mixture?

Posted by Aryujardhan Singh 1 year, 6 months ago

CBSE > Class 12 > Chemistry

1 answers

Anjan Karthi 1 year, 6 months ago

HOMOGENOUS MIXTURES = The components of such mixtures are evenly distributed across the volume of the mixture. As no boundary of separation exist between these components, they can't be separated by simple physical methods. HETEROGENOUS MIXTURES = These mixtures actually have a concrete boundary of separation between it's components and are not so evenly distributed. They can be separated physically.

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What do the terms positive and negative refers to?

Posted by Ruhana Parvin 1 year, 6 months ago

CBSE > Class 12 > Chemistry

2 answers

Suraj Kumar 1 year, 6 months ago

Homogenous mixture = it's means composition and property are uniform throughout the mixture Example = acid + water Common examples = lemon water Heterogeneous mixture = it's means composition and property are non uniform thorougout the mixture Common example = sand + water

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Jaspreet Kaur 1 year, 6 months ago

In the simplest sense positive means good or the opposite of negative .if you have a positive attitude about homework, for example , you are more likely to get positive feedback on your report card.

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Henry's law depend upon?

Posted by Daya Au 1 year, 6 months ago

CBSE > Class 12 > Chemistry

5 answers

Shreya Sinha 1 year, 5 months ago

Temperature and nature of gas

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Suraj Kumar 1 year, 6 months ago

Henry's law depends = temperatures, nature of liquid

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Mannat Thukral 1 year, 6 months ago

It is dependent on mole fraction and partial pressure of the liquid liquid mixture

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Piyush Kumar Piyush Kumar 1 year, 6 months ago

Partial Pressure of gas

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Anjan Karthi 1 year, 6 months ago

Persistent temperature and enthalpy conditions. Even the reaction underlying the dissolution.

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Why leanne is storing aspirin for medical use?Is her this act correct?Give reason

Posted by Praveen Prem 1 year, 6 months ago

CBSE > Class 12 > Chemistry

1 answers

Anjan Karthi 1 year, 6 months ago

Aspirin is a good antipyretic and requires to be stored under low temperatures (preferably 273K - 278K). It is also found to have analgesic properties and unlike other aromatic compounds, it is not mostly carcinogenic (reduced risk to cancer). Thus, her act is definitely correct considering her intentions.

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A mixture of chlorobenzene & bromobenzene is nearly an ideal solution but a mixture of chloroform & acetone is not. explain?

Posted by Ruhana Parvin 1 year, 6 months ago

CBSE > Class 12 > Chemistry

1 answers

Anjan Karthi 1 year, 6 months ago

In chloroform and acetone mixture, the double bonded oxygen of acetones get hydrogen bonded with the hydrogen of chloroform. Thus, there is a significant change in the strength of bonding in chloroform - acetone mixtures, than in individual chloroform and acetone solutions. Thus, vapour pressure also changes during dissolution and consequently, the solution does not follow Raoul's law for ideal solutions.

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Ch 4 chemical kinetics differentiated graph

Posted by Shrayansh Jain 1 year, 6 months ago

CBSE > Class 12 > Chemistry

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How to study

Posted by Khushi Joshi 1 year, 7 months ago

CBSE > Class 12 > Chemistry

5 answers

Parush Chaudhary 1 year, 6 months ago

🤔😊🫡

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Sunanda Nandu 1 year, 6 months ago

First have the thought of studying from heart

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Official King 1 year, 6 months ago

Ye toh nhi pta yrr

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Aseem Mahajan 1 year, 6 months ago

<font face ="Times New Roman">As you did in past 13 years

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Account Deleted 1 year, 6 months ago

from your books 📚

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Why delta TB of aq solution of Nacl is nearly twice to that 1m aq solution of glucose

Posted by Ankit. Kishor 1 year, 7 months ago

CBSE > Class 12 > Chemistry

2 answers

Anjan Karthi 1 year, 7 months ago

Hope this was useful !!!!

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Anjan Karthi 1 year, 7 months ago

In aqueous solution, there is a very prominent possibility (which is 100%, theoretically) that NaCl may dissociate into Na+ and Cl- ions. So, since it is the number of particles of the solute in the solvent that tends to cause an elevation in the BP of the latter, NaCl an ionisable solute (with its two constituent ions) can produce double the impact (∆Tb) than in the case of glucose (a non ionisable organic solute).

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Molarity formula

Posted by Abhinav 1 1 year, 7 months ago

CBSE > Class 12 > Chemistry