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

Halogens have an impaired electron that is present in the outermost shell (valence shell) of the atom . When photons (light particles ) of suitable energy hit the atom , the electron get excited and moves of higher energy states in the atom .

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Reaction of ethanol

Posted by Aqib Malik 7 years, 4 months ago

CBSE > Class 12 > Chemistry

1 answers

Deepti Malik 7 years, 4 months ago

C2H5OH

0Thank You

ANSWER

In a first order reaction the concentration of reactant is reduced from 0.6 mole per litre to 0.2 mole per litre in 5 minutes calculate the rate constant of the reaction.

Posted by Kartikeya Singh 7 years, 4 months ago

CBSE > Class 12 > Chemistry

2 answers

Mandeep Kaur 7 years, 4 months ago

3.6*10 raise to the power 3

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Mandeep Kaur 7 years, 4 months ago

0.08

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A match box exhibit

Posted by Nagesh Kundaragi 7 years, 4 months ago

CBSE > Class 12 > Chemistry

1 answers

Nagesh Kundaragi 7 years, 4 months ago

Orthorombic geomtry

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How coal n petroleum are formed? Why they are called fossil fuels??

Posted by Nonu Kaushik 7 years, 4 months ago

CBSE > Class 12 > Chemistry

1 answers

Lipak Mohapatra 7 years, 4 months ago

Refer to class 8 science book.

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Can we say that vicinal dihalides are the special form of Terminal dihalides???

Posted by Prince Roy 7 years, 4 months ago

CBSE > Class 12 > Chemistry

0 answers

ANSWER

Why amorphous solid are known as super cooled liquids

Posted by Gurpreet Singh Guri 7 years, 4 months ago

CBSE > Class 12 > Chemistry

1 answers

Utkarsh Yadav 7 years, 4 months ago

Because it has a property of slowly flow in heating.ex. that "glass" in ancient builidng it bottom edge is thick compare then top edge because of its property to flow in heating

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Convert ethyl to alcohol

Posted by Sneha Kumari 7 years, 4 months ago

CBSE > Class 12 > Chemistry

1 answers

Monalisha Priya 7 years, 4 months ago

Bgffgj

1Thank You

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Distinguish between ethylamine and aniline by hinsberg's reagent and NaOH.

Posted by Lurshai Dohling 7 years, 4 months ago

CBSE > Class 12 > Chemistry

0 answers

ANSWER

Calculate molarity of the solution obtained on mixing 100 ml of 0.1M H2SO4 with 50 ml of 0.1 M NaOH

Posted by Nikhil Kesharwani 7 years, 4 months ago

CBSE > Class 12 > Chemistry

0 answers

ANSWER

How to learn whole syllabus in such a short time plz tell me the trick and time table such that all subjects can be ?

Posted by Piyush Bhatt 7 years, 4 months ago

CBSE > Class 12 > Chemistry

1 answers

Samir Mughal??????️? 7 years, 4 months ago

Make notes in the manner u learn the topics.. N revise them at the tume of exam

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Why in the electrochemical cell anode is -ve ?

Posted by Piyush Bhatt 7 years, 4 months ago

CBSE > Class 12 > Chemistry

2 answers

Lipak Mohapatra 7 years, 4 months ago

Could not get the question.plese do refer the cell whether it is galvanic or electrolytic cell.

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Harsimran K 7 years, 4 months ago

Anode is positively charged due to this negatively charged particles attract towards positively charged anode and therefore it is negative.

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What is the size of particles in a collidal solution?

Posted by Piyush Bhatt 7 years, 4 months ago

CBSE > Class 12 > Chemistry

1 answers

Harsimran K 7 years, 4 months ago

B/w 1nm-1000nm

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What type of highlights and ketones undergo hello from reaction. Mention the oxidizing agent in this reaction

Posted by Tejas S 7 years, 4 months ago

CBSE > Class 12 > Chemistry

1 answers

Sarv Verma 7 years, 4 months ago

Sodium hypohalite is the oxidising agent

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What iscarbon

Posted by Hiba Khatoon 7 years, 4 months ago

CBSE > Class 12 > Chemistry

3 answers

Kiara Khurrana 7 years, 4 months ago

u r caarbon means koyla

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Harsimran K 7 years, 4 months ago

Carbon is a non metal

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Harsh Singh 7 years, 4 months ago

Carbon is a group 14 element

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Hello guys an question irritates me too much. such as ZnCO3 exists or not . Plz tell how we can know that any compound will exists or not exists plz

Posted by Abhat Singh 7 years, 4 months ago

CBSE > Class 12 > Chemistry

3 answers

Kiara Khurrana 7 years, 4 months ago

u crezy person Abhat singh see your face n u go to hell and idiot bustad

0Thank You

Abhat Singh 7 years, 4 months ago

Just go to hell Sadhvi Narayan . Idiot

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Kiara Khurrana 7 years, 4 months ago

go n ask ZnCo3 wheather it exist or not

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ANSWER

Name the ores rich in radioactive elements

Posted by Kapil Negi 7 years, 4 months ago

CBSE > Class 12 > Chemistry

1 answers

Hiba Naqvi 7 years, 4 months ago

Uranium

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What happen when dimethyle mercury is dropped on human skin if something happens then why

Posted by Akash Seth 7 years, 4 months ago

CBSE > Class 12 > Chemistry

0 answers

ANSWER

Sadhavi narayan just i am discussing about syllabus it not apersonal problem. but thanks for your suggestion. here we should ask only about our question doubts

Posted by Manvik Malhotra 7 years, 4 months ago

CBSE > Class 12 > Chemistry

1 answers

Kiara Khurrana 7 years, 4 months ago

l think u dont know how to speak before a teacher u foolish girl

2Thank You

ANSWER

Radius ratio and structural arrangement of NH4Br ?

Posted by Sakshi Malik 7 years, 4 months ago

CBSE > Class 12 > Chemistry

0 answers

ANSWER

At 291k the molar conductivities at infinite dilution of NH4Cl NaOH and NaClare 129.8 217.4 and 108.9Scmsq per mol respectively if the molar conductivity of cent molar solution of NH4Cl is 9.33ScmSq per mol what will be percentage dissociation of NH4OH at this temperature ? Also calculate the dissociation constant of NH4OH

Posted by Babita Khatik 7 years, 4 months ago

CBSE > Class 12 > Chemistry

1 answers

Ashok Kumar 5 years, 8 months ago

3.92%, 1.599×10-3

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What are representative elements

Posted by Mehakpreet Kaur 7 years, 4 months ago

CBSE > Class 12 > Chemistry

2 answers

G K 7 years, 4 months ago

s and p block except inert gas i.e. 18th group....

2Thank You

Anjana Sherawat 7 years, 4 months ago

I think elements of s and p blocks

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Chlorine is electron withdrawing bt it give electron in resonance of chloro benzene why

Posted by Ajay Anthwal 7 years, 4 months ago

CBSE > Class 12 > Chemistry

1 answers

Anjana Sherawat 7 years, 4 months ago

Because it has lone pair of electrons so it shows + R effect

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ANSWER

Always when i asked about syllabus this particular student always write that total syllabus complete. total lie.?? you all are agree that our half syllabus completed ???

Posted by Manvik Malhotra 7 years, 4 months ago

CBSE > Class 12 > Chemistry

3 answers

Parneet Bassi 7 years, 4 months ago

I also agree dear everyone syllabus would be completed the important is understanding the concepts ?

0Thank You

Manan Bedi 7 years, 4 months ago

We have completed 12 chapters in chemistry,10 in physics,10 in maths,full book in computer science

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Kiara Khurrana 7 years, 4 months ago

l think my dear this is place where we discuss only our problems related to subject not our personal problems so just ask only your problem ........??☺️??

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a student completed all the syllabus. this student allways write that total syllabus is completed. very good????you will crack cbse exam. best wishes. this student also joined cbse guide.com

Posted by Manvik Malhotra 7 years, 4 months ago

CBSE > Class 12 > Chemistry