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Weightage of all chapters of chemistry?

Posted by Priyansh Chaudhary 8 years, 1 month ago

1 answers

Ayush Balyan 8 years, 1 month ago

Ch-1=4marks;ch-2=5marks;ch-3=5marks; Ch-4=5marks;ch-5=4marks;ch-6=3marks; Ch-7=8marks;ch-8=5marks;ch-9=3marks; Ch-10 =4marks;ch-11=4marks; Ch-12=6marks; ch-13=4marks; Ch-14=4marks; ch-15=3marks; Ch-16=3marks.

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Why in the reaction of XeF4 + H2O--------> 2 molecules of XeO3 and 3 molecules of 02 exists...!!????

Posted by Megha Sahu 8 years, 1 month ago

CBSE > Class 12 > Chemistry

0 answers

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How to make timetable for boards??

Posted by Jaya Maheshwari 8 years, 1 month ago

CBSE > Class 12 > Chemistry

0 answers

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Why are aquatic species more comfortable in cold water than in hot

Posted by Anisha Negi 8 years, 1 month ago

CBSE > Class 12 > Chemistry

0 answers

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Can I have all important topics for board exam

Posted by Prashant Kaushik 8 years, 1 month ago

CBSE > Class 12 > Chemistry

1 answers

Jaya Maheshwari 8 years, 1 month ago

All topics are important in boards.

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Please give some suggestion to study organic chemistry before February

Posted by Arya Tyagi Arya 8 years, 1 month ago

CBSE > Class 12 > Chemistry

1 answers

Rahul Gotwal 8 years, 1 month ago

Ist of you done your organic from ncert than do previous year questions papers

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How to find the value of n inelectrochemistry

Posted by Satyajeet Singh 8 years, 1 month ago

CBSE > Class 12 > Chemistry

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In which type of structure a NaCl type compound change into when subject to heat at high temperature

Posted by Puja Anand 8 years, 1 month ago

CBSE > Class 12 > Chemistry

1 answers

Kanan Joshi 8 years, 1 month ago

bcc structure

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What is cuiry law

Posted by Nitish Kumar 8 years, 1 month ago

CBSE > Class 12 > Chemistry

1 answers

Prashant Shukla 8 years, 1 month ago

Acc. To cuiry law the magnetisation of paramagnetic material is inversaly proportional to the absolute temperature of that material

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What happens when glycerol rects with KHSO4?

Posted by Saijal Rekhani 8 years, 1 month ago

CBSE > Class 12 > Chemistry

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Does penicillin has narrow spectrum antibodies ?

Posted by Sakshi Verma 8 years, 1 month ago

CBSE > Class 12 > Chemistry

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Why nitrogen don't form pentaoxide

Posted by Sagar Kumar 8 years, 1 month ago

CBSE > Class 12 > Chemistry

1 answers

Ayushi Agrawal 8 years, 1 month ago

Bcz nitrogen lacks vaccant d orbital .. so cant expand its orbital and unable to exhibit in+5 ocidation state

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Cannizaro rxn

Posted by Kalpana Shekhawat 8 years, 1 month ago

CBSE > Class 12 > Chemistry

1 answers

Vikas Chaudhary 8 years, 1 month ago

When aldehyde without alpha hydrogen reacts with conc. NaOH then one oxidised and one reduced product is formed.... This is known as canizzaro rxn

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N2 is almost chemically inert .Why?

Posted by Shreedhar Babar 8 years, 1 month ago

CBSE > Class 12 > Chemistry

2 answers

Kunal Saini 8 years, 1 month ago

Because of high bond enthalay of Ntriple bondN

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Amar Kumar 8 years, 1 month ago

Nitrogen is found as a diatomic molecule (N2) in nature. There is a triple bond between the two nitrogen atoms. The triple bond is pretty strong. Therefore, it needs a lot of energy to break those bonds and participate in a reaction. So nitrogen is commonly referred to as and used as an inert gas (high abundance & low cost.) . Nitrogen does react if the conditions are met..

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What happen when ferrimagnetic fe3o4 is heated at 850 k and why ?

Posted by Shivam Vishal 8 years, 1 month ago

CBSE > Class 12 > Chemistry