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

So u have done 9 chapters ..these r more than enough to pass if u did them thoroughly ..and if u are aiming to complete whole syllabus then it's impossible what u can do is study important points..or go for previous years questions..u can do NCERT questions for organic..do as much possible . don't rush to complete syllabus instead try to revise the chapters u studied?..i am trying to help in my way.. rest depends on you..all the best?

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Muskaan Vig 6 years, 1 month ago

NCERT back exercise ques ans are must..hope it helps

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CH2=CH-CH-OH-CH2-CH2-CH3 what will be the IUPAC name of the compound

Posted by Spade Udit754 6 years, 1 month ago

CBSE > Class 12 > Chemistry

2 answers

Tushar Banjara 6 years, 1 month ago

Tere liye khali nahi bate hai

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Vashu Yadav 6 years, 1 month ago

Hex1en2ol

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What is molar mass

Posted by Nishant Indolia 6 years, 1 month ago

CBSE > Class 12 > Chemistry

1 answers

Gaurav Seth 6 years, 1 month ago

The molar mass is the mass of one mole (or 6.023 X 10²³) particles of that substance. The molar mass of an element is equal to the numerical value of the atomic mass. However, in case of molar mass, the units change from ‘u’ to ‘g’. The molar mass of an atom is also known as gram atomic mass.
For example mass of 6.023 X 10²³atoms of sodium or molar mass of sodium is 23g, but its atomic mass is 23u

Calculation of molar mass: The molar mass of oxygen is equal to mass of one mole of oxygen. Oxygen forms a divalent molecule, so this is the mass of one mole of O_{2}.

Atomic weight of oxygen atom = 16g

Molar mass of oxygen = 2 x 16.00 g = 32.00 g

Molar mass of a molecule: Molar mass of a molecule is the mass of 1 mole of molecule.

To find the molar mass of a molecule we should add the atomic masses of all the atoms present in that molecule.

The molar mass of water is the mass of one mole of H₂O.

Now add the atomic masses of the atoms of hydrogen and oxygen in a molecule of water

= 2 x 1.008 g+ 1 x 16.00 g = 18.02 g

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Molar mass

Posted by Nishant Indolia 6 years, 1 month ago

CBSE > Class 12 > Chemistry

0 answers

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Give evidence that [Co(NH3)5Cl]SO4 are ionisation isomers

Posted by Rahul Kumar 6 years, 1 month ago

CBSE > Class 12 > Chemistry

1 answers

Aastha Saxena 6 years, 1 month ago

Cl- and SO42- are both ligands and they can exchange each other in this complex so thats why the complex showas ionisation isomers

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ANSWER

Why phenol shows pink colour while it is white crystalline solid.

Posted by Tushar Bhola 6 years, 1 month ago

CBSE > Class 12 > Chemistry

0 answers

ANSWER

Arrange the following in increasing order of their boiling point:- CH3CH2OH, CH3CHO, CH3-O-CH3

Posted by Khyati Deepak 6 years, 1 month ago

CBSE > Class 12 > Chemistry

1 answers

Tamanna Sharma 6 years, 1 month ago

Alcohol > Aldehyde >ether

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ANSWER

Explain the effect of temperature and pressure on the solubility of gas and liquid

Posted by Prerna Rasaily 6 years, 1 month ago

CBSE > Class 12 > Chemistry

1 answers

Tamanna Sharma 6 years, 1 month ago

Pressure increases solubility increase. If exothermic then on increasing temperature solubility decreases and if it is endothermic then on increasing temperature solubility increases

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What is rectified spirit ?????

Posted by Prateek Mishra 6 years, 1 month ago

CBSE > Class 12 > Chemistry

1 answers

Tamanna Sharma 6 years, 1 month ago

highly concentrated ethanol.

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Important topics for board exams

Posted by Rax Singh 6 years, 1 month ago

CBSE > Class 12 > Chemistry

0 answers

ANSWER

What is tranquilizers?

Posted by Ankit Singh 6 years, 1 month ago

CBSE > Class 12 > Chemistry

2 answers

Yogita Ingle 6 years, 1 month ago

Tranquilizers are a class of chemical compounds used for the treatment of stress, and mild or even severe mental diseases.
These relieve anxiety, stress, irritability or excitement by inducing a sense of well-being. They form an essential component of sleeping pills.
There are various types of tranquilizers.
They function by different mechanisms.
For example, noradrenaline is one of the neurotransmitters that play a role in mood changes.
If the level of noradrenaline is low for some reason, then the signal-sending activity becomes low, and the person suffers from depression.
In such situations, antidepressant drugs are required.
These drugs inhibit the enzymes which catalyse the degradation of noradrenaline.

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Shalini Roy 6 years, 1 month ago

It is a type of drug or medicine which is use to cure mental problems such as mild and stress

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What is micelle

Posted by Heena Yadav 6 years, 1 month ago

CBSE > Class 12 > Chemistry

2 answers

Sulekha Singh 6 years, 1 month ago

A spherical aggregate of molecule formed by association of polar and non polar part of soap is called micelle.

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Lokesh Prajapati 6 years, 1 month ago

an aggregate of molecules in a colloidal solution, such as those formed by detergents.

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How can be prepared p block, dblock or organic chapter help me

Posted by Vishal Attri 6 years, 1 month ago

CBSE > Class 12 > Chemistry

3 answers

Aayushi Attri 6 years, 1 month ago

Papers*

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Aayushi Attri 6 years, 1 month ago

U can try...sample papera

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Tamanna Sharma 6 years, 1 month ago

Doing previous year questions

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I am not getting chemistry guys ☹️???☹️??? What should I do?

Posted by Tapan Pandey?? 6 years, 1 month ago

CBSE > Class 12 > Chemistry

5 answers

Tapan Pandey?? 6 years, 1 month ago

I don't have doubts in chemistry, all concepts are getting mixed up....

0Thank You

Gopal Mishra 6 years, 1 month ago

I also suggest u go on utube search. Bharat panchal. One shot vdos of all chapter,. Its. Best for u. Bcz. In one vdos your all doubts are clear. So i request to u go. Utube and watch vdos. Of bharat panchal

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A ? 6 years, 1 month ago

Okk then do one think.....check Aman dhattrawal chemistry videos on you tube....it will definitely help u to understand chemistry

4Thank You

Tapan Pandey?? 6 years, 1 month ago

I have IP an my optional subject so, you study PE

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A ? 6 years, 1 month ago

Study physical education...

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How score gud mark in chemistry plz help me

Posted by Sidhu Sidhu 6 years, 1 month ago

CBSE > Class 12 > Chemistry

1 answers

Prince Das 6 years, 1 month ago

Check previous years ques... Then prepare... Use day 1 for it and the nxt three fir preparation

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Assertion and reason will come in 2020 cbse paper

Posted by Manav Dua 6 years, 1 month ago

CBSE > Class 12 > Chemistry

2 answers

Siddharth Menon 6 years, 1 month ago

Yes it will

1Thank You

Mayank Patidar 6 years, 1 month ago

Yes

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syllabus of chemistry

Posted by Sameer Sameer 6 years, 1 month ago

CBSE > Class 12 > Chemistry

2 answers

Tushar Bhola 6 years, 1 month ago

Bhaut badiya ????

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Prince Das 6 years, 1 month ago

Great!!!!!???

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Structure of 2-(2-bromophenyl)-butane

Posted by Aditya Kumar 6 years, 1 month ago

CBSE > Class 12 > Chemistry

1 answers

Gaurav Seth 5 years, 6 months ago

<th>Molecular Formula:</th> <th>Synonyms:</th>

C₈H₇BrO

2-(2-bromophenyl)acetaldehyde

96557-30-1

(2-Bromophenyl)acetaldehyde

Benzeneacetaldehyde, 2-bromo-

2-bromophenyl acetaldehyde

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Cannizo r×n name

Posted by Pratik Kumarpachahara1234 6 years, 1 month ago

CBSE > Class 12 > Chemistry

1 answers

Karan Sharma 6 years, 1 month ago

Condensation of Ketones in presence of concentrated h2so4

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What is Pyrometallury?

Posted by Manjay Jha 6 years, 1 month ago

CBSE > Class 12 > Chemistry

2 answers

Navneet . 6 years, 1 month ago

Soo gyi kya XD ?

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Navneet . 6 years, 1 month ago

use of high temperatures to extract and purify metals.

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Why at isoelectric point ,amino acids have least viscosity? Please answer it....

Posted by Tamanna Sharma 6 years, 1 month ago

CBSE > Class 12 > Chemistry

0 answers

ANSWER

do i need to look guides or is ncert is enough?

Posted by Dimple Queen 6 years, 1 month ago

CBSE > Class 12 > Chemistry

3 answers

Apoorva Rao 6 years, 1 month ago

Just follow Ncert

1Thank You

Tamanna Sharma 6 years, 1 month ago

NCERT is enough for chemistry

1Thank You

Gaurav Rawat 6 years, 1 month ago

Guide

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am i able to use Clarks table for chemistry board exam

Posted by Dimple Queen 6 years, 1 month ago

CBSE > Class 12 > Chemistry

0 answers

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Conversion of aniline to clorobenzene And Give test to distinguish between ethanol and pentanone

Posted by Himam Jani 6 years, 1 month ago

CBSE > Class 12 > Chemistry

2 answers

Tapan Pandey?? 6 years, 1 month ago

Iodoform

1Thank You

Pankaj Singh 6 years, 1 month ago

Aniline is treated with sodium nitrate and hclat 273 K.than give cuprous chloride(sandmeyer reaction) - chlorobenzene is formed Ethanol and pentanone can be distinguished by iodoform test (NaOI)

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Arrange following in increasing order of boiling points. (CH3) 3N ,C2H5OH, C2H5NH2

Posted by Nakshathara Suresh 6 years, 1 month ago

CBSE > Class 12 > Chemistry