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

Transition elements show variable oxidation states because the energy between their valency orbitals {(n-1)d and ns} is very less. So the both the energy levels can be used for bond formation.

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Mr Nishant Smith 3 years ago

Yes

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Rspl

Posted by N Keerthika 1920 2 years, 11 months ago

CBSE > Class 12 > Chemistry

1 answers

Na. Shakthi 3 years ago

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If 22 gm of benzene is dissolved in 122 gm of carbontetrachloride, calculate mass percentage of benzene

Posted by Kunal Patidar 3 years ago

CBSE > Class 12 > Chemistry

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To prepare 100ml is standard solution of m/20 ferrous ammonium salphate and by using thish solution find out the military and strength given kmno4 solution.(8)

Posted by Subhash Chandra 3 years ago

CBSE > Class 12 > Chemistry

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ANSWER

By which method of preparation we get purest haloalkane

Posted by Salikul Islam 3 years ago

CBSE > Class 12 > Chemistry

4 answers

Na. Shakthi 3 years ago

Socl2 because the product like so2 and hcl get escaped

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Dhanesh Pandya 3 years ago

Darzene reaction

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Shubham Baliyan 3 years ago

R_oH react with red p/x2

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Dhanesh Pandya 3 years ago

Thionyl chloride (socl2)

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to identify the anion and cation present in the given salt sample

Posted by Sriom Das 3 years ago

CBSE > Class 12 > Chemistry

1 answers

Anshul Pratap Singh 2 years, 9 months ago

Anion means negative ( a negative ion ) Cation =positive Ex Na+(cation ) ,Cl- ,(anion)

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Why zn called transition element ?

Posted by Yashveer Sharma 3 years ago

CBSE > Class 12 > Chemistry

3 answers

Vp Raghavi 3 years ago

The last electron of zn is filled in d orbital were it has fully filled d orbital 3d^10 4s^2 ,the transition element means it has valence electron but zinc is fully filled so it is not a transition element.

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Hacker Bhai 3 years ago

Zn is fully filled in last d orbital they are electronic configurations is 3d^104s^2 they are stable in common oxidation state and transition element mean a half filled in d orbital is know as transition element

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Deepika Gautam 3 years ago

Zn has fully fill d orbital present in there d subshell there electronic configuration is 3d^10 4s^2 so and transition elements means a half filled d orbital is known as transition elements. Hope it will!

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Chennai sahodya question paper

Posted by Petchimuthu P 3 years, 1 month ago

CBSE > Class 12 > Chemistry

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Salt analysis of zinc carbonate

Posted by Tripti Kumari 3 years, 1 month ago

CBSE > Class 12 > Chemistry

1 answers

Yashveer Sharma 3 years ago

Hii

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DT sahcsifzri CD tu ctek vs yocgkftocu

Posted by Deepak Chaudhary 3 years, 1 month ago

CBSE > Class 12 > Chemistry

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Posted by Paras Rekwal 3 years, 1 month ago

CBSE > Class 12 > Chemistry

0 answers

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In partical extarnal mainly which type questions ask

Posted by Ashu Goswami 3 years, 1 month ago

CBSE > Class 12 > Chemistry

2 answers

Aadyasha Giri 3 years ago

Basically they will ask you questions from the project file that has been prepared by you... they will start questioning from that only further they will start asking for the topics from the chapter related to the project.

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Akansha Rana 3 years, 1 month ago

From your books and project file by you . If he/she call in you group you know other one topic also And some question from lab manual that's it

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Practical question

Posted by Hammad Shams 3 years, 1 month ago

CBSE > Class 12 > Chemistry

3 answers

Akhya Sahay 3 years, 1 month ago

Search on Youtube

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Hishant Varshney 3 years, 1 month ago

Check in lab manual

2Thank You

Nrapendra Singh Kundoliya 3 years, 1 month ago

What is lanthanoid contraction

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Find the normality of a 250ml solution formed by 9.8 g of barium hydroxide

Posted by Samiksha Shahi 3 years, 1 month ago

CBSE > Class 12 > Chemistry

1 answers

Anjan Karthi 3 years, 1 month ago

Molarity = W 2 × 1000 / M 2 × V = 9.8 × 1000 / (137 + 17 + 17) × 250 = 9.8 × 4 / 171 = 39.2 / 171 = 0.23 M. // Therefore, normality = Molarity × n-factor = 0.23 × 2 = 0.46 N. //

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Metallurgy notes

Posted by Priya Priya 3 years, 1 month ago

CBSE > Class 12 > Chemistry

2 answers

Yashveer Sharma 3 years ago

1Thank You

Harshit Mishra 3 years, 1 month ago

Hii priya

4Thank You

ANSWER

What is d^3s hybridization

Posted by Namanjot Singh 3 years, 1 month ago

CBSE > Class 12 > Chemistry

1 answers

Akk Mii 3 years, 1 month ago

are u taking about d2sp3?

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What is nearst equation

Posted by Ashutosh Choubey 3 years, 1 month ago

CBSE > Class 12 > Chemistry

3 answers

Gurchetan Singh 3 years, 1 month ago

This equation defines the relation between the concentrations of an ion on either side of a membrane that it perfectly selective for that ion and the potential difference (voltage) that will be measured across that membrane under equilibrium conditions.

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Urvashi Kalia 3 years, 1 month ago

E=E*cell-0.059/n log (anode pdt)/(cathode pdt)

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Soumya Srivastava 3 years, 1 month ago

What is a solution

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why is cryolite added in the electrolysis of alumina?

Posted by Shubham Kumar 3 years, 1 month ago

CBSE > Class 12 > Chemistry

1 answers

Preeti Dabral 3 years, 1 month ago

Cryolite is added to alumina as to lower the fusion temperature and make the mass good conductor of electricity.

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structure of compound Di-sec. butyl ketone

Posted by Tanishka Sharma 3 years ago

CBSE > Class 12 > Chemistry

4 answers

Tanishka Sharma 3 years, 1 month ago

I don't know in which school you study

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Yash Maheshwari 3 years, 1 month ago

Copy this link and you will get the structure in he form of image https://uploadnow.io/f/70w8G8n

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Yash Maheshwari 3 years, 1 month ago

MJ170403 10 9 0 0 0 0 0 0 0 0999 V2000 -1.3272 0.5022 0.0000 C 0 0 0 0 0 0 0 0 0 0 0 0 -1.3158 1.3645 0.0000 C 0 0 0 0 0 0 0 0 0 0 0 0 -1.3272 -0.3227 0.0000 C 0 0 0 0 0 0 0 0 0 0 0 0 -2.1522 0.5022 0.0000 C 0 0 0 0 0 0 0 0 0 0 0 0 0.3514 -0.3770 0.0000 C 0 0 0 0 0 0 0 0 0 0 0 0 0.3891 1.5044 0.0000 C 0 0 0 0 0 0 0 0 0 0 0 0 1.1292 0.5136 0.0000 C 0 0 0 0 0 0 0 0 0 0 0 0 -0.5022 0.5022 0.0000 C 0 0 0 0 0 0 0 0 0 0 0 0 -0.5361 1.4678 0.0000 O 0 0 0 0 0 0 0 0 0 0 0 0 0.3785 0.5022 0.0000 C 0 0 0 0 0 0 0 0 0 0 0 0 1 2 1 0 0 0 0 1 3 1 0 0 0 0 1 4 1 0 0 0 0 1 8 1 0 0 0 0 10 5 1 0 0 0 0 10 6 1 0 0 0 0 10 7 1 0 0 0 0 8 10 1 0 0 0 0 8 9 2 0 0 0 0 M END

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Prashant Sher Yadavanshi 3 years, 1 month ago

Tanishaka Sharma ap mere school may padhti ho kya

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If a chain of 4 single bonded Carbon is there , and from left to right on 2nd position there is 1 Bromine and at 3rd position there are 2 methyl groups . So from where will be the correct numbering given to Carbon

Posted by Prateek Verma 3 years, 1 month ago

CBSE > Class 12 > Chemistry

2 answers

Anjan Karthi 3 years, 1 month ago

From right to left. So, the name would be 3-bromo-2,2-dimethyl butane.

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Tanishka Sharma 3 years, 1 month ago

1-Bromine, 3,3-dimethylbutyraldehyde

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Sample paper o1 CBSE guide line ka

Posted by Sandhya Rajput 3 years, 1 month ago

CBSE > Class 12 > Chemistry

2 answers

Prashant Sher Yadavanshi 3 years, 1 month ago

Mujhe pat hay

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Mukta Joshi 3 years, 1 month ago

Don't know

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Explain physical significance of (psi)2

Posted by Shailesh Vats 3 years, 1 month ago

CBSE > Class 12 > Chemistry

0 answers

ANSWER

Difference between Electrolytic conductance and Electronic conductance

Posted by R.Sasi Kumar 3 years, 1 month ago

CBSE > Class 12 > Chemistry

1 answers

Anjan Karthi 3 years, 1 month ago

Electrolytic conductance is caused by the mobility of IONS in their AQUEOUS electrolytic solutions. But, electronic conductance is caused by the mobility of ELECTRONS within the lattices of METALS or other similar ELECTRONIC CONDUCTORS (like graphite).

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Formic acid is stronger than acetic acid.

Posted by Shubham Kumar 3 years, 1 month ago

CBSE > Class 12 > Chemistry

1 answers

Anjan Karthi 3 years, 1 month ago

The main reason for stability of carboxylate anion formed by acidic property of carboxylic acids is resonance. But, even under such stability there does exist a possibility that the carboxylic carbon have some residual deficit of negative charge (not actually positive charge) , and this may be caused by the +I effect of alkyl groups connected to the carbon. But, since formic acid has no alkyl group connected to the acid group, it is the stronger than acetic acid.

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What is amino acid

Posted by Ajitha Kumari 3 years, 1 month ago

CBSE > Class 12 > Chemistry

4 answers

Ashutosh Mishra 3 years, 1 month ago

2Thank You

Hitanshu Mathur 3 years, 1 month ago

Hello

1Thank You

Anjan Karthi 3 years, 1 month ago

Chemically, an amino acid is a substituted methane molecule wherein three of the hydrogens around the central carbon are replaced by an amino group, an acid group and an alkyl group. Whether an amino acid is actually acidic, basic or neutral depends on the alkyl group. If the alkyl group has an amino substituent branch, the amino acid is basic, if the group has a - COOH substituent, the amino acid is acidic and if it has no other functional group, the amino acid is neutral. These amino acids undergo polymerisation to form heteropolymers known as proteins.

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Sakshi Gupta 3 years, 1 month ago

Protein

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What are alcohols and phenols?

Posted by Ayushi Dasar 3 years, 2 months ago

CBSE > Class 12 > Chemistry