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The osmotic pressure of a 0.0103 molar solution of an electrolyte is found to be 0.70atm at 27°C calculate i=? Take R=0.082

Posted by Ananya Shukla 7 years, 7 months ago

CBSE > Class 12 > Chemistry

1 answers

Tannu Bhardwaj 7 years, 7 months ago

P =MRT i 0.70 = 0.0103 ×0.082 × 300 i i = 2.7

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Why freezing point decreases on adding non volatile solute to a pure solvent ??

Posted by Alok Sharma 7 years, 7 months ago

CBSE > Class 12 > Chemistry

0 answers

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How to do log table calculations ?

Posted by Sandeep Singh 7 years, 7 months ago

CBSE > Class 12 > Chemistry

1 answers

Lekha Raj 7 years, 7 months ago

This is not included in cbse syllabus...

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ANSWER

What is mean of stoichiometry

Posted by पूरा राम गुर्जर 7 years, 7 months ago

CBSE > Class 12 > Chemistry

1 answers

Rishabh Sahu 7 years, 7 months ago

Stoichiometry is made up of 2 word roots stoichion meaning element metron means to measure. It deals with the calculation of masses ( sometimes volumes also ) of the products and reactants involved in a chemical reaction.

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Derive expression for first order reaction of rate constant

Posted by Ritik Raushan 7 years, 7 months ago

CBSE > Class 12 > Chemistry

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What is coordination number of the Ca2+ and the F- ions in CaF2 crystal lattice?

Posted by Anubhooti Saxena 7 years, 7 months ago

CBSE > Class 12 > Chemistry

1 answers

Manpreet Kaur 7 years, 7 months ago

Co ordination no. of Ca2+ ions is 8 and F- ions is 4

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Diamond and solid rhombic sulphur both are covalent solids but the latter has very low melting point then former. Explain why?

Posted by Anubhooti Saxena 7 years, 7 months ago

CBSE > Class 12 > Chemistry

0 answers

ANSWER

Polonium adopts cubic structure

Posted by Snigdha Mukherjee 7 years, 7 months ago

CBSE > Class 12 > Chemistry

1 answers

Divoj Setia 5 years, 8 months ago

Arey aisa kuchh nhi aana yaar paper mein kya fayada...ye sab pagal bana rhe h ______ Chill maar kuchh ni hota ??

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what is meaning of E°cell?Difference btw Ecell or E°.

Posted by Minal Ansari 7 years, 7 months ago

CBSE > Class 12 > Chemistry

0 answers

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Find freezing point of solution containing 60g of glucose in 250ml of water

Posted by Pratibha Srivastava 7 years, 7 months ago

CBSE > Class 12 > Chemistry

2 answers

Tannu Bhardwaj 7 years, 7 months ago

Tf =kf m i T -T' =1.86 × (( 60 ÷ 180 )÷ 0.250) ×1 0 -T' = 1.86 ×4/3 -T' = 2.48 T' = - 2.48 °c

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Anubhav Bhatnagar 7 years, 7 months ago

Solve the eq. Tb-273.15=kb×60×1000/180×250 kB of water=1.83

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What type of substance would make better parmanent magnent ferromagnent or ferrimagnent justify your answer?????

Posted by Sakshi Tiwari 7 years, 7 months ago

CBSE > Class 12 > Chemistry

1 answers

Tannu Bhardwaj 7 years, 7 months ago

Ferromagnetic subs. bcoz they ate strongly attracted by a magnetic field. While ferrimagnetic subs. show less magnetic than expected. The ferromagnetic behaviour ofca subs in solid state is by the metal ions which are grouped in small region called domain. When this subs is placed in magnetic field produce a large magnetic moment as all domains get oriented in direction of magnetic field

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Properties of liquid

Posted by Deep Darshan Deka 7 years, 7 months ago

CBSE > Class 12 > Chemistry

2 answers

Payal Verma 7 years, 7 months ago

1. It can take the shape of the container in which it is kept. 2. It is the intermediate phase between solid and liquid. 3. More intermolecular space. 4.

2Thank You

Mansee Saini 7 years, 7 months ago

It's molecules are not closely packed It can flow freely

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What is the difference between first ionisation enthalpy and second ionisation enthalpy?

Posted by Sandra B 7 years, 7 months ago

CBSE > Class 12 > Chemistry

2 answers

Rohit Kumar 7 years, 7 months ago

1st ionisation enthalpy is energy required to remove 1 electron from outermost shell and 2nd ionisation enthalpy is energy required to eject 2nd electron from outermost shell

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Ashita Laxami 7 years, 7 months ago

First ionization enthalphy is the energy required to pull out 1 valanced electron from atom to form ion..and 2nd I.E is energy required to pull out electron from the ion(atom which has become ion)..these I.E vary in magnitudes in different type of elements..eg in alkali metals 1 I.E is more than 2 I.E

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Numerical based on chapter 2

Posted by Harjap Singh 7 years, 7 months ago

CBSE > Class 12 > Chemistry

0 answers

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Unit cell

Posted by Mohd Bilal 7 years, 7 months ago

CBSE > Class 12 > Chemistry

1 answers

Salvey Choudhary 7 years, 7 months ago

The smallest basic repeating unit which is repeated over and over again in 3 dimensional space to generate crystal of a given substance.

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Why racemisation is not for optically inactive?

Posted by Rishi Rajput 7 years, 7 months ago

CBSE > Class 12 > Chemistry

1 answers

Rhitika Rai 7 years, 7 months ago

becoz in optically inactive either d or l are not present

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A solution prepared from 1.25g of oil in wintergreen in 99g of benzene has a boiling point of 80.31C. Determine the molar mass of this compound.

Posted by Hadiya Tahir 7 years, 7 months ago

CBSE > Class 12 > Chemistry

1 answers

Mahima Verma 7 years, 7 months ago

By using the formula for molar mass of boiling point . We can calculate for molar mass

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Mass percentage of elements present in Na2SO4

Posted by Lakhan Jethani 7 years, 7 months ago

CBSE > Class 12 > Chemistry

0 answers

ANSWER

Why hydrogen burns with only pop sound??

Posted by Durgesh Kumar 7 years, 7 months ago

CBSE > Class 12 > Chemistry

0 answers

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Heyyy ☺ Calculate the molality of H2SO4 soln in which mole fraction of water is 0.85 ?????

Posted by Nikita Kumari 7 years, 7 months ago

CBSE > Class 12 > Chemistry

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Conductivity of 0.12 M CuSO4 solution at 298 k is 1.8×10^-4 S/cm. Calculate its equivalent conductivity

Posted by Aryan Bajpai 7 years, 7 months ago

CBSE > Class 12 > Chemistry

0 answers

ANSWER

Henrys constant

Posted by Pankti Patel 7 years, 7 months ago

CBSE > Class 12 > Chemistry

2 answers

Chirag Gupta 7 years, 7 months ago

Mole fraction or solubility is directly proportional to partial pressure of gas

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Princesses Kaur 7 years, 7 months ago

Mass of solution directly proportional to pressure of solution

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Sodium

Posted by Phakon Hazowary 7 years, 7 months ago

CBSE > Class 12 > Chemistry

4 answers

Jin Kazama 7 years, 7 months ago

K really ???

0Thank You

Shivam Pandey 7 years, 7 months ago

1Thank You

Sanjeev Jain 7 years, 7 months ago

1. A soft metal which is highly reactive with water. 2 It can easily be cut by knife. 3. Its hydroxide made from water is highly basic in nature.

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Pankti Patel 7 years, 7 months ago

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What is orgel diagram

Posted by Phakon Hazowary 7 years, 7 months ago

CBSE > Class 12 > Chemistry

1 answers

Payal Verma 7 years, 7 months ago

It is a correlation diagram which shows the relative energies of electronic terms.

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Carbon tetrachloride and water are immiscible whereas alcohol and water are miscible.explain on the basis of molecular structures of there compunds.

Posted by Pankti Patel 7 years, 7 months ago

CBSE > Class 12 > Chemistry

1 answers

Rishabh Sahu 7 years, 7 months ago

H bonding in alcohol with water is possible but not in carbon tetrachloride. Also CCl4 is non polar due to symmetry so no vanderwall interactions. Therefore water is miscible in alcohol and not in CCl4.

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How are solid is rigid

Posted by Govinda Sharma 7 years, 7 months ago

CBSE > Class 12 > Chemistry

3 answers

Sanjeev Jain 7 years, 7 months ago

1. The intermolecular space between the particles of solid is very minute. 2. The force of attraction between the particles is very strong. 3. These particles of solid only vibrate at their mean position. So solids are rigids.

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Rajneesh Pandey 7 years, 7 months ago

No intermolecular space..they are being kept tightly by inter molecular attration

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Princesses Kaur 7 years, 7 months ago

Intermucler forces are strong

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How to read chapter electrochemistry??

Posted by Saurav Singh 7 years, 7 months ago

CBSE > Class 12 > Chemistry