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

Eletrochemical cell: 1 it converts chemical energy to electric energy. 2 in electrochemical cell anode is negtive . 3 in electrocgemical cell cathod is postive. 4 current is flown by a spountanous reaction Electrolytic cell: 1 it converts electrically energy to chemical energy. 2 in electrolytic cell anode is postive. 3 in electrolytic cell cathod is negative. 4 non spanutones reaction is made spanutones by supplying current

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Strong ligand

Posted by Anklesh Rathod 7 years, 8 months ago

CBSE > Class 12 > Chemistry

2 answers

Amandeep Kumar 7 years, 8 months ago

Oxilate ion

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Shruti Mishra 7 years, 8 months ago

Cyanide :CN act as a strong ligand. A ligand are genreally d block element which forms coordinate complex with other compound. Ligand simply means a good electron donor

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Given that the abundance of isotopes 54 Fe,56Fe,and 57Fe are 5%,90% and 5% respectively ,the atomic mass of Fe is (a)- 55.85. (b)- 55.95 (c)- 55.75. (d)- 56.05 Plz with solution answer dena

Posted by Hina Sagar 7 years, 8 months ago

CBSE > Class 12 > Chemistry

0 answers

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Which Cataylst is used in Haber's Process?

Posted by Nitish Sharma 7 years, 8 months ago

CBSE > Class 12 > Chemistry

2 answers

Kiran Mann 7 years, 8 months ago

Fe is the catalyst being used in haber's process

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Mohit Sepat 7 years, 8 months ago

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The freezing point of pure nitrobenzene is 278.8 K. When 2.5 g of unknown substance is dissolved in 100 g of nitrobenzene the freezing point of solution is found to be 276.8 K. If the freezing point depression constant for nitrobenzene is 8.0 K kg/mol, what is the molar mass of unknown substance?

Posted by Ashok Kumar 7 years, 8 months ago

CBSE > Class 12 > Chemistry

0 answers

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the freezing point of the solution containing 0.3 g of acetic acid in 30 g of benzene is lowered by 0.45 C . Calculate Van't Hoff factor. Kf for benzene (c6h6)=5.12kg /mol

Posted by Ashok Kumar 7 years, 8 months ago

CBSE > Class 12 > Chemistry

0 answers

ANSWER

Chemistry padhne ka koi tips do mujhe ??

Posted by Amandeep Kumar 7 years, 8 months ago

CBSE > Class 12 > Chemistry

3 answers

Amandeep Kumar 7 years, 8 months ago

Thank you....Thank you very much guys

1Thank You

Rashi Rawat 7 years, 8 months ago

Chemistry sabse achi chandrahas kumar ki h it will help you to study unhone kuch tricks bhi batayi h jo helpful h you tube m search marna chandrahas kumar

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Isha Taneja 7 years, 8 months ago

Actually i also don't like chemistry but love physics and maths too. Just to get good marks in chemistry u have to focus n understand the concept clearly .But for this u have to develop some interest in it uhh just listen the lectures n u will definitely love the subject.Also refer online lectures by mlearning other than coachings it will save ur time too.

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Limitations of ellingham diagram

Posted by Abd Fan 7 years, 8 months ago

CBSE > Class 12 > Chemistry

2 answers

Vidushi Shukla 7 years, 8 months ago

1.) It does not tell how fast is the reduction process 2.)It take the reactants and products to be in equilibrium but it is not always true.

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Akhilesh Yadav 7 years, 8 months ago

Sin2 thita

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ANSWER

Example of liquid solid type solution

Posted by Piyush Bhatt 7 years, 8 months ago

CBSE > Class 12 > Chemistry

2 answers

Farah Naaz 7 years, 8 months ago

Gel

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Akhilesh Yadav 7 years, 8 months ago

Hydrate salt

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Rate constant of a first order reaction is 6.93÷10^3 per minute . If we start with 10 mol/l it is reduced to 1.25 mol /l in how many minutes

Posted by Smriti Kandpal 7 years, 8 months ago

CBSE > Class 12 > Chemistry

1 answers

Rocky Choudhary 7 years, 8 months ago

T = 3 * 10^-4 min.

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ANSWER

What is tincture of iodine??

Posted by Dilpreet Singh 7 years, 8 months ago

CBSE > Class 12 > Chemistry

1 answers

Vidushi Shukla 7 years, 8 months ago

20 g iodine, 24 g sodium iodide in 500 ml alcohol and purified water to make it 1000 ml. Its an antiseptic.

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Definition of F-centres

Posted by Farah Naaz 7 years, 8 months ago

CBSE > Class 12 > Chemistry

2 answers

Amandeep Kumar 7 years, 8 months ago

The vacant space occupied by the electrons are called f centers

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Aakash Chauhan 7 years, 8 months ago

The anionic site occupied by unpaired electron is called F centre

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Define molal elevation constant

Posted by Palaksh Patil 7 years, 8 months ago

CBSE > Class 12 > Chemistry

1 answers

Deepa Singh Parihar 7 years, 8 months ago

molal elevation constant is defined as the elevation in boiling point when the concentration is unity or 1molal.

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ANSWER

Why gibbs free energy is positive in electrolytic cell while negative in galvanic cell?

Posted by Vidushi Shukla 7 years, 8 months ago

CBSE > Class 12 > Chemistry

1 answers

Gaurav Tiwari 7 years, 8 months ago

Go to you tube chanel "keep educating yourself" here you can find your all chemistry questions answer.

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ANSWER

Gas A is more stable in water than gas B at same temperature which one will have the higher value of kH (Henry's constant) and why

Posted by Tanu Tanu 7 years, 8 months ago

CBSE > Class 12 > Chemistry

1 answers

Akhilesh Yadav 7 years, 8 months ago

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ANSWER

Frankle's defect

Posted by Lakshay Panwar 7 years, 8 months ago

CBSE > Class 12 > Chemistry

1 answers

Tanu Tanu 7 years, 8 months ago

When cation are missing from lattice sites and occupy interstitial sites. It occurs in compounds with low coordination number and large difference in size of cations and anions

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Salphonation reaction. Give reaction for following

Posted by Balbir Singh Kurrey 7 years, 8 months ago

CBSE > Class 12 > Chemistry

0 answers

ANSWER

What happen when aluminium reacts with tertiary butyl alcohol ??

Posted by Ayush Ar Shrivastava 7 years, 8 months ago

CBSE > Class 12 > Chemistry

0 answers

ANSWER

How can we breakup the H2SO4 in ions

Posted by Sandeep Singh 7 years, 8 months ago

CBSE > Class 12 > Chemistry

1 answers

Dilshad Malik 7 years, 8 months ago

2H+ +SO4 2-

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Give some tips to study chemistry

Posted by Amandeep Kumar 7 years, 8 months ago

CBSE > Class 12 > Chemistry

1 answers

Satyam Chimaniya 7 years, 8 months ago

रोज़ दिन में 25.21 घंटे रट्टा लगाओ और अगले साल देखो कमाल। साला chemistry क्या chemistry का बाप भी नहीं रोक सकता

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ANSWER

Why bond angle in PH4+ is higher than in Ph3

Posted by Ajay Singh 7 years, 8 months ago

CBSE > Class 12 > Chemistry

2 answers

Farah Naaz 7 years, 8 months ago

PH4+ and PH3 both are sp3 hybridised but PH4+ do not have lone pair so its bond angle is109 whereas PH3 have lone pair which decrease its bond angle from 109to 107.

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Satyam Chimaniya 7 years, 8 months ago

पता नहीं

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ANSWER

Phmgbr reactivity order

Posted by Umang Jain 7 years, 8 months ago

CBSE > Class 12 > Chemistry