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

It's in ncert. If you want to understand the topic then you may see online videos based on it. However first ,insist your teachers to explain it once again clearly.

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Which have the following contain odd number of electrons. 1.paramagnetic 2.dimagnetic 3.ferimagnetic 4.fericmagnetic

Posted by Sunny Dev Anand 7 years, 6 months ago

CBSE > Class 12 > Chemistry

3 answers

Sunny Dev Anand 7 years, 6 months ago

Yes but why

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Shubham Dubey 7 years, 6 months ago

Para

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Kusum Rani 7 years, 6 months ago

Paramagnetic

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Q. Which method is used for concentration of sulphide ores ?

Posted by Amreen Fatma 7 years, 6 months ago

CBSE > Class 12 > Chemistry

1 answers

Xyz Xyz 7 years, 6 months ago

froth flotation

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Does ceric ammonium nitrate is base or acid?

Posted by Keshav Twelve Class 7 years, 6 months ago

CBSE > Class 12 > Chemistry

1 answers

Sahil Khan 7 years, 6 months ago

Base

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Write the relationship between E0 and kc G0and E0 Go and kc

Posted by Sai Sreenivas 7 years, 6 months ago

CBSE > Class 12 > Chemistry

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What is electrophilic agent

Posted by Lovely Choudhary 7 years, 6 months ago

CBSE > Class 12 > Chemistry

1 answers

Anand Kumar 7 years, 6 months ago

It's Electrophilic Reagent . In organic chemistry, an electrophile is a reagent attracted to electrons. Electrophiles are positively charged or neutral species having vacant orbitals that are attracted to an electron rich centre. It participates in a chemical reaction by accepting an electron pair in order to bond to a nucleophile. Because electrophiles accept electrons, they are Lewis acids (see acid-base reaction theories). Most electrophiles are positively charged, have an atom that carries a partial positive charge, or have an atom that does not have an octet of electrons.

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In nacl crystal how many schotlky pains are present per cm3 of the solid

Posted by Prerna Pal 7 years, 6 months ago

CBSE > Class 12 > Chemistry

2 answers

Niharika Srivastav 7 years, 6 months ago

In NaCl there are approximately 10^6 Schottky pairs per cm3.

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Aisha Gupta 7 years, 6 months ago

Approximately 10³.10³ i.e 10 tothe power 6

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In nacl crystal how many schotlky pains are present per cm 3 of the solid

Posted by Prerna Pal 7 years, 6 months ago

CBSE > Class 12 > Chemistry

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What is solid state

Posted by Patel Abdulla Ahmad 7 years, 6 months ago

CBSE > Class 12 > Chemistry

1 answers

Nitin Kumar 7 years, 6 months ago

It's a chapter in which we can get more knowledge about the solids. How they are held with each other and etc.....

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Food is a source of energy and coal is also a source of energy. Can we take coal instead of food as a energy

Posted by Ashish Shrivas 7 years, 6 months ago

CBSE > Class 12 > Chemistry

1 answers

Hakaishin Manan San 7 years, 6 months ago

No we can't take coal as a source of energy for our body ...as won't break down by our digestive system

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what is the half life period for a zero order reaction?

Posted by Garvit Pandey 7 years, 6 months ago

CBSE > Class 12 > Chemistry

1 answers

Wani Rao 7 years, 6 months ago

T1/2=Ro /2k

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What are the uses of Nickel-cadmium cell?

Posted by Pratap Dash 7 years, 6 months ago

CBSE > Class 12 > Chemistry

1 answers

Sunanda Singh 7 years, 6 months ago

The active components of a rechargeable NiCd battery in the charged state consist of nickel hydroxide (NiOOH) in the positive electrode and cadmium (Cd) in the negative electrode. For the electrolyte, usually caustic potash solution (potassium hydroxide) is used. Due to their low internal resistance and the very good current conducting properties , Ni-Cd cells can supply extremely high currents and can be recharged rapidly.

These cells are operating in a large temperature range, from +60°C down to -20°C. The selection of the separator (nylon or polypropylene) and the electrolyte (KOH, LiOH, NaOH) is also of great importance. These constituents influence the voltage conditions in the case of a high current discharge, the service life and the overcharging capability of the cell. In the case of misuse, a very high-pressure may arise quickly.

For this reason these cells are equipped with a reversible safety valve, which can act several times. NiCd cells offer a long service life (depending on the type of application and charging unit up to 2000 cycles) thereby ensuring a high degree of the economy.

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What is the iupac name of Fe(CO)5

Posted by Nikita Das 7 years, 6 months ago

CBSE > Class 12 > Chemistry

2 answers

Vaibhav Sharma 7 years, 6 months ago

Pentacorbonyl iron

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Vaibhav Malik 7 years, 6 months ago

Pentacarbonyl iron

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What is positive deviation and how it occurs??

Posted by Amit Dubey 7 years, 6 months ago

CBSE > Class 12 > Chemistry

1 answers

Sunanda Singh 7 years, 6 months ago

In mixtures showing a positive deviation from Raoult's Law, the vapour pressure of the mixture is always higher than you would expect from an ideal mixture. The deviationcan be small - in which case, the straight line in the last graph turns into a slight curve.

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Plz state Kohlsaursch law

Posted by Tamoghna Roy 7 years, 6 months ago

CBSE > Class 12 > Chemistry