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Haloalkanes are immiscible in water. Why?

Posted by Manisha Sagar 5 years, 8 months ago

CBSE > Class 12 > Chemistry

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Pcl5 is ionic in solid state.why?

Posted by Navjot Singh 7 years, 3 months ago

CBSE > Class 12 > Chemistry

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Deepak Jindal 7 years, 3 months ago

PCl5 conducts electricity in the molten state. This means that in the solid state it exists as {PCl4} positive and {PCl6} negative in which the cation is tetrahedral and the anion is octahedral

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How urotropine is prepared ?

Posted by Rishabh Nigam 7 years, 3 months ago

CBSE > Class 12 > Chemistry

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coordination compounds VBT [Ti(H2O) 6]^+3

Posted by Madhusudan Dhakad 7 years, 3 months ago

CBSE > Class 12 > Chemistry

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The heza

Posted by Tilak Raj 7 years, 3 months ago

CBSE > Class 12 > Chemistry

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what is electrochemical series

Posted by Abhishek Raj 7 years, 3 months ago

CBSE > Class 12 > Chemistry

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Anuj Jaiswal 7 years, 3 months ago

Jjuo

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What is kohraucsh law

Posted by Anamika Verma 7 years, 3 months ago

CBSE > Class 12 > Chemistry

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Mariyam Fidha 7 years, 3 months ago

Limiting molar conductivity of an electrolyte can be represented as the sum of the individual contribution of anion and cation of the electrolyte

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What is the difference between sol and colloidal solution

Posted by Aryan Rajput 7 years, 3 months ago

CBSE > Class 12 > Chemistry

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Pranava Raman Bms 7 years, 3 months ago

Sols are a special case of colloidal solutions where the dispersion medium is a liquid.

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What is point defect?

Posted by Akash Brar Brar 7 years, 3 months ago

CBSE > Class 12 > Chemistry

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Bharvi Dani 7 years, 3 months ago

Deviation or irregularities from the original structure of the atom is a point defect.

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An element has a BCC structure with cell edge of 288 pm the density of the elment is 7.2g/cmcube how many atoms are present in 208g of the element

Posted by Manvinder Singh 7 years, 3 months ago

CBSE > Class 12 > Chemistry

1 answers

Anjana Sherawat 7 years, 3 months ago

Firstly find out molar mass by density formula. Then use 6.022 × 10^23 to find no of atoms in 208g

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In what way is a solid different from a gel

Posted by A M 7 years, 3 months ago

CBSE > Class 12 > Chemistry

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Anjana Sherawat 7 years, 3 months ago

Gel is a colloidal solution of liquid in solid

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Why are solids are rigid

Posted by Zeba Gulrez 7 years, 3 months ago

CBSE > Class 12 > Chemistry

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Yogita Ingle 7 years, 3 months ago

Solids are rigid because the intermolecular forces of attraction that are present in solids are very strong. The constituent particles of solids cannot move from their positions they can only vibrate from their mean positive.

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la+3 and lu+3 don't show any colour in sol why

Posted by Alisha Panwar 5 years, 8 months ago

CBSE > Class 12 > Chemistry

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Reaction with butan 1. Ol in presence of lukas reagent macanisum

Posted by Vicky Verma 7 years, 3 months ago

CBSE > Class 12 > Chemistry

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Explain leaching of alumina from bauxite?

Posted by Ashu Yadav 7 years, 3 months ago

CBSE > Class 12 > Chemistry

1 answers

Deepika Dahiya 7 years, 3 months ago

Pure alumina( Al2O3) is obtained from bauxite ore by baeyer's process . The bauxite ore is usually contains impurities of iron oxide (Fe2O3 ),silica( SiO3) and titanium oxide (TiO3).the powdered ore is heayedwith a concentrated 45%solution of NaOH at 573-523k and 35-36 bar pressure .under these conditions alumina (Al2O3) dissolves forming sodium meta aluminate and silica as sodium silicate leaving behind the impurities. The resulting solution is filtered cooled and its ph adjusted downwards either by dilution or by neutralization with carbon dioxide.thereafyer the solution is seeded with freshly prepared samples of hydrated alumina when hydrated alumina gets precipitated leaving sodium silicate in the solution. Hydrated alumina obtained as above is filtered washed and finally heated to about 1473k to get pure alumina

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What is conductance of electrolytic solution

Posted by Satakshi Srivastava 7 years, 3 months ago

CBSE > Class 12 > Chemistry

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Anjana Sherawat 7 years, 3 months ago

Conductance is resiprocal of resistance

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Find molarity of 15% solution of H2SO4 density 1.020gcm^-3

Posted by Pinky Verma 7 years, 3 months ago

CBSE > Class 12 > Chemistry

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Jeetu Sharma 7 years, 3 months ago

14.70gm/mol

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Why + 5 Oxidation state of Bismuth is less stable than + 3

Posted by Ashish Rajput 7 years, 3 months ago

CBSE > Class 12 > Chemistry

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Deepika Dahiya 7 years, 3 months ago

Due to inert pair effect.therefore its +5 oxidation state is much less stable than its +3 oxidation state. Bismuth in the pentavalent state can easily accept two electrons and thus get reduced to more stable trivalent bismuth

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Mathile alchol change to athile alchol

Posted by Rohit Yadav 7 years, 3 months ago

CBSE > Class 12 > Chemistry