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 5 years, 10 months 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 5 years, 10 months ago

CBSE > Class 12 > Chemistry

2 answers

Tushar Banjara 5 years, 9 months ago

Tere liye khali nahi bate hai

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Vashu Yadav 5 years, 10 months ago

Hex1en2ol

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What is molar mass

Posted by Nishant Indolia 5 years, 10 months ago

CBSE > Class 12 > Chemistry

1 answers

Gaurav Seth 5 years, 10 months 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 5 years, 10 months ago

CBSE > Class 12 > Chemistry

0 answers

ANSWER

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

Posted by Rahul Kumar 5 years, 10 months ago

CBSE > Class 12 > Chemistry

1 answers

Aastha Saxena 5 years, 10 months 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 5 years, 10 months 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 5 years, 10 months ago

CBSE > Class 12 > Chemistry

1 answers

Tamanna Sharma 5 years, 10 months 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 5 years, 10 months ago

CBSE > Class 12 > Chemistry

1 answers

Tamanna Sharma 5 years, 10 months 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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ANSWER

What is rectified spirit ?????

Posted by Prateek Mishra 5 years, 10 months ago

CBSE > Class 12 > Chemistry

1 answers

Tamanna Sharma 5 years, 10 months ago

highly concentrated ethanol.

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Important topics for board exams

Posted by Rax Singh 5 years, 10 months ago

CBSE > Class 12 > Chemistry

0 answers

ANSWER

What is tranquilizers?

Posted by Ankit Singh 5 years, 10 months ago

CBSE > Class 12 > Chemistry

2 answers

Yogita Ingle 5 years, 10 months 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 5 years, 10 months 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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ANSWER

What is micelle

Posted by Heena Yadav 5 years, 10 months ago

CBSE > Class 12 > Chemistry

2 answers

Sulekha Singh 5 years, 10 months 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 5 years, 10 months 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 5 years, 10 months ago

CBSE > Class 12 > Chemistry

3 answers

Aayushi Attri 5 years, 10 months ago

Papers*

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Aayushi Attri 5 years, 10 months ago

U can try...sample papera

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Tamanna Sharma 5 years, 10 months ago

Doing previous year questions

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

Posted by Tapan Pandey?? 5 years, 10 months ago

CBSE > Class 12 > Chemistry

5 answers

Tapan Pandey?? 5 years, 10 months ago

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

0Thank You

Gopal Mishra 5 years, 10 months 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

1Thank You

A ? 5 years, 10 months 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?? 5 years, 10 months ago

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

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A ? 5 years, 10 months ago

Study physical education...

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ANSWER

How score gud mark in chemistry plz help me

Posted by Sidhu Sidhu 5 years, 10 months ago

CBSE > Class 12 > Chemistry

1 answers

Prince Das 5 years, 10 months 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 5 years, 10 months ago

CBSE > Class 12 > Chemistry

2 answers

Siddharth Menon 5 years, 10 months ago

Yes it will

1Thank You

Mayank Patidar 5 years, 10 months ago

Yes

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syllabus of chemistry

Posted by Sameer Sameer 5 years, 10 months ago

CBSE > Class 12 > Chemistry

2 answers

Tushar Bhola 5 years, 10 months ago

Bhaut badiya ????

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Prince Das 5 years, 10 months ago

Great!!!!!???

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ANSWER

Structure of 2-(2-bromophenyl)-butane

Posted by Aditya Kumar 5 years, 10 months ago

CBSE > Class 12 > Chemistry

1 answers

Gaurav Seth 5 years, 3 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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ANSWER

Cannizo r×n name

Posted by Pratik Kumarpachahara1234 5 years, 10 months ago

CBSE > Class 12 > Chemistry

1 answers

Karan Sharma 5 years, 10 months ago

Condensation of Ketones in presence of concentrated h2so4

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What is Pyrometallury?

Posted by Manjay Jha 5 years, 10 months ago

CBSE > Class 12 > Chemistry

2 answers

Navneet . 5 years, 10 months ago

Soo gyi kya XD ?

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Navneet . 5 years, 10 months 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 5 years, 10 months ago

CBSE > Class 12 > Chemistry

0 answers

ANSWER

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

Posted by Dimple Queen 5 years, 10 months ago

CBSE > Class 12 > Chemistry

3 answers

Apoorva Rao 5 years, 10 months ago

Just follow Ncert

1Thank You

Tamanna Sharma 5 years, 10 months ago

NCERT is enough for chemistry

1Thank You

Gaurav Rawat 5 years, 10 months ago

Guide

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am i able to use Clarks table for chemistry board exam

Posted by Dimple Queen 5 years, 10 months 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 5 years, 10 months ago

CBSE > Class 12 > Chemistry

2 answers

Tapan Pandey?? 5 years, 10 months ago

Iodoform

1Thank You

Pankaj Singh 5 years, 10 months 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 5 years, 10 months ago

CBSE > Class 12 > Chemistry