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

It is the water which is free from ions . This is done to reduce its electric conductance . it is not much beneficial for drinking as ions are important for us. It is needed to perform experiments in a better way.

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Is class 12chemistry tough

Posted by Swetha Sri 8 years ago

CBSE > Class 12 > Chemistry

2 answers

Vipin Pandey 8 years ago

So small yr ......ncert eek eek word pd do phir Dekho.....

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Deepanshu Chauhan 8 years ago

2 book is tough

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Why layer of hexagonal planar in three dimension cannnt be arranged parallel to each other

Posted by Nishant Singh 8 years ago

CBSE > Class 12 > Chemistry

1 answers

Swetha Sri 8 years ago

Because it has lone pair , more repulsion ..

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Atomic mas of As element

Posted by Zeenat Rizvi 8 years ago

CBSE > Class 12 > Chemistry

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Percentage mass fraction is 8% and percentage mass by volume fraction is 10% .Then, calculate density of solution.

Posted by Kiran Bala 8 years ago

CBSE > Class 12 > Chemistry

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What is acetophenone?

Posted by Shreyas Trivedi 8 years ago

CBSE > Class 12 > Chemistry

2 answers

Addy Singh 8 years ago

In para

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Himanshu Shukla 8 years ago

Ch3co in.benzene ring

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What are wrutz and sandmeyer reactions

Posted by Shreyas Trivedi 8 years ago

CBSE > Class 12 > Chemistry

1 answers

Akash Agarwal 8 years ago

Visit anirudh walia YouTube channel....u will get all naming reactions..

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A compound forms hexagonal closed packed structure.what is the total number of voids in 0.5mol of it and in which how many tetrahedral voids

Posted by Mack Jissi Mack 8 years ago

CBSE > Class 12 > Chemistry

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What is the difference between dislocation defect and hexagonal voids

Posted by Sumit Kandhil 8 years ago

CBSE > Class 12 > Chemistry

1 answers

Vipin Pandey 5 years, 11 months ago

Tera sir .......ncert pd...

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Drug's

Posted by Sheikh Alina 8 years ago

CBSE > Class 12 > Chemistry

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Does sulphur trioxide shows dative bond ? If yes then explain

Posted by Muskaan Garg 8 years ago

CBSE > Class 12 > Chemistry

1 answers

Minal Sinha 8 years ago

Yes, it has a dative bond. The central sulphur atom is connected to one oxygen by a double bond, and to the other oxygen by a dative bond. The SO2 molecule has a bent (angular) shape.

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While calculating the no. Of atoms of the face of the cube we use the formula 6*1/2 so here why we use 1/2

Posted by Aman Chhillar 8 years ago

CBSE > Class 12 > Chemistry

1 answers

Siddhant Singh 8 years ago

Each atom present at the centre of the face is shared equally by two unit cells.That's why we use 1/2 here.

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Example of sol

Posted by Aayush Subba 8 years ago

CBSE > Class 12 > Chemistry

2 answers

Shreyas Trivedi 8 years ago

Mixture*Mixture

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Shreyas Trivedi 8 years ago

Solutions Moist air minute of air nd water

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What are transistors?

Posted by Soumya Khandal 8 years ago

CBSE > Class 12 > Chemistry

1 answers

Dhananjay Pundhir 8 years ago

A transistor is a semiconductor device used to amplify or switch electronic signals and electrical power. It is composed of semiconductor material usually with at least three terminals for connection to an external circuit.

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The unit cell of an element having the atomic mass 108 and its density s 10.5 g/cm-3 has an edge length 409pm deduce the type of crystal latlice

Posted by Mayank Yadav 8 years ago

CBSE > Class 12 > Chemistry