CBSE > Class 12 > Chemistry | CBSE Board | Homework Help

Refractive index of a solid is observed to have the same value along all directions indicates that it is isotropic in nature thus it must be an amorphous solid. Amorphous solids do not undergo clean clevage so, this solid will also not undergo sharp cleavage.

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I Have problem in NCERT CHEMISTRY chapter 10 Q NO 10.19

Posted by Om Digital Graphic And Animation 3 years, 2 months ago

CBSE > Class 12 > Chemistry

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Cl2 is more reactive than icl .? Why

Posted by Himanshi Sharma 3 years, 2 months ago

CBSE > Class 12 > Chemistry

1 answers

Benson E B 3 years, 2 months ago

Due to interhalogen bonding being weaker than X-X bonding

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Why is pidilite added in the electrolysis of almunia

Posted by Sahil Shrivastav 3 years, 2 months ago

CBSE > Class 12 > Chemistry

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What is the effect of temperature on the rate of reaction

Posted by Sahil Shrivastav 3 years, 2 months ago

CBSE > Class 12 > Chemistry

2 answers

Vishwa Pratap 3 years, 2 months ago

If the reaction is endothermic the reaction process time would be minimised whereas if it's a exothermic reaction the time in reaction would eventually increase....in gernal scenario it's said as temperature is directly proportional to the rate of change of reaction but throughly it's not completely true

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Bhumika Agrawal 3 years, 2 months ago

In endothermic the rate of reaction will increase. In exothermic the rate of reaction will decrease

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I have selected 2 subjects(Maths and chemistry) for improvement exam in cbse 2021 if I absent in one of them subject and present in second subject then what will happen to the subject marks in which I was absent?

Posted by Ayush Tripathi 3 years, 2 months ago

CBSE > Class 12 > Chemistry

2 answers

Vishwa Pratap 3 years, 2 months ago

The subject marks would be evaluated as last attempt

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Bhumika Agrawal 3 years, 2 months ago

May be zero

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What are double salts?

Posted by Arunav Chatterjee 3 years, 3 months ago

CBSE > Class 12 > Chemistry

2 answers

Bharaman Jha 3 years, 3 months ago

When two single salts like Nacl and bacl2 are mixed then double salt are formed for eg kcl.mgcl2 .6H2O

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Arunav Chatterjee 3 years, 3 months ago

Double salts are the mixture of Tu salts we can dissolve in aquatic medium shows the the test of all the ions present in the solution ex K2SO4.Al2(SO4)3.24 H2O

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When I need solids take part in packaging , then octahedral or tetrahedral voids fraction depend on what factors ?

Posted by Miss Ritika 3 years, 3 months ago

CBSE > Class 12 > Chemistry

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What is the meaning of efficient packing ?

Posted by Miss Ritika 3 years, 3 months ago

CBSE > Class 12 > Chemistry

2 answers

Tec Om 3 years, 3 months ago

It means the maximum volume is occupied by atoms or molecules in a unit cell

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Manpreet Kaur 3 years, 3 months ago

It is the fraction of the crystal (or unit cell) actually occupied by atoms . It must always be less than 100% because it is impossible to pack spheres without having some empty spaces between them.

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TiO is an example of which solid ?

Posted by Miss Ritika 3 years, 3 months ago

CBSE > Class 12 > Chemistry

2 answers

Unnati Ag. 3 years, 2 months ago

Para-magnetic solids

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Manpreet Kaur 3 years, 3 months ago

Crystalline solid

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Vicinal dihalide is

Posted by Asvath A 3 years, 3 months ago

CBSE > Class 12 > Chemistry

2 answers

Tec Om 3 years, 3 months ago

Do pas pas wale carbon atom par ek ek halogen atom ho vahi hai vicinal dihalide

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Tec Om 3 years, 3 months ago

Compounds in which halogen atom are attached to two adjacent carbon

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Is their were only 3 isomer of hexene ???or their were more

Posted by Karan Bhatt 3 years, 3 months ago

CBSE > Class 12 > Chemistry

2 answers

Atharva Verma 3 years, 3 months ago

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Bhumika Agrawal 3 years, 3 months ago

U can draw more than 5 isomer of hexene

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From our earlier studies, we know that liquids and gases are called (a) amorphous solid (b) fluids (c) crystalline solid (d) mixture (e) none of these

Posted by Bhumika Agrawal 3 years, 3 months ago

CBSE > Class 12 > Chemistry

3 answers

Atharva Verma 3 years, 3 months ago

Fluids

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Shiva Jaiswal 3 years, 3 months ago

Fluids (option B)

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Shashank 11 3 years, 3 months ago

Fluids

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Helloo girlsss and boyss

Posted by Scientist ..????? 3 years, 3 months ago

CBSE > Class 12 > Chemistry

5 answers

Scientist ..????? 3 years, 3 months ago

How are u

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Atharva Verma 3 years, 3 months ago

Hlo

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Bhumika Agrawal 3 years, 3 months ago

Hlo

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Levin Yadav 3 years, 3 months ago

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Manish Singh Yadav 3 years, 3 months ago

Hii

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An antifreeze solution is prepared from 222.6 g of ethylene glycol (C 2 H 6 O 2 ) and 200 g of water. Calculate the molality of the solution. If the density of the solution is 1.072 g mL −1 , then what shall be the molarity of the solution?

Posted by Krishna Kaushik 3 years, 3 months ago

CBSE > Class 12 > Chemistry

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In a laboratory experiment, 50 cc of a solution originally 0.2 M in CH3COOH was permitted to come to equilibrium with a 5g of charcoal. At equilibrium, 25 cc of CH3COOH required 30 cc of 0.1 M NaOH neutralization. Find equilibrium concentration of the acid & the amount of CH3COOH adsorbed (in g) per gram of the charcoal

Posted by Abc Def 3 years, 1 month ago

CBSE > Class 12 > Chemistry

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When CBSE will release sample paper for 2021-22 batch

Posted by Kumari Prity 3 years, 3 months ago

CBSE > Class 12 > Chemistry

1 answers

Atharva Verma 3 years, 3 months ago

Soon

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expain van't hoff factor?

Posted by Tec Om 3 years, 3 months ago

CBSE > Class 12 > Chemistry

4 answers

Vishwa Pratap 3 years, 2 months ago

This is removed from the current class 12th syllabus

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Bharaman Jha 3 years, 3 months ago

It's a correction term used to solve question of colligative properties ..

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Dhilleswara Rao 3 years, 3 months ago

Van't hoff factor is denoted by i which is multipled by colligative properties to get the accurate answer

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Pramod Yadav 3 years, 3 months ago

P block element

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Why sulphur shows more catenation than oxygen?

Posted by Atharva Verma 3 years, 3 months ago

CBSE > Class 12 > Chemistry

3 answers

Vidhi Kamboj 3 years, 2 months ago

Due to smaller size and lone pair repulsion in the oxygen atom, it is not able to show catenation property while sulphur due it's larger size than oxygen and less repulsion between lone paire due to distance between them , it can exist as S8 in nature and hence shows catenation property.

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Bharaman Jha 3 years, 3 months ago

Elctronegativity is one of the cause

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Shashank 11 3 years, 3 months ago

Because oxygen is more electronegative than sulphur due to which repulsion b/w oxygen molecules is high..

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2H² + O²

Posted by Sarthak Gupta 3 years, 3 months ago

CBSE > Class 12 > Chemistry

2 answers

Sher Singh 3 years, 3 months ago

2 H20

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Sarthak Gupta 3 years, 3 months ago

2H²O

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Why H2S is acidic while H2O is neutral?

Posted by Atharva Verma 3 years, 3 months ago

CBSE > Class 12 > Chemistry

2 answers

Tanishqa Arora 3 years, 3 months ago

As we go down the group of halides the tendency to lose hydrogen increases. Therefore acidity increases.

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Akash Soni 3 years, 3 months ago

Becacuse in H2O H bond occurs which make them strong bond so bond doesn't dissociate easily and not give H+ In H2S H bond not occur so easily dessociate to give H+. H2O is not neutral it is weak acidic

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Halide react with amine

Posted by Anchal Maurya 3 years, 3 months ago

CBSE > Class 12 > Chemistry