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Trends in chemical reactivity of group 15

Posted by Sheetal Malik 8 years, 4 months ago

CBSE > Class 12 > Chemistry

0 answers

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What is n-type semicoductors?

Posted by Tarun Thakur 8 years, 4 months ago

CBSE > Class 12 > Chemistry

2 answers

Tanmay Joshu 8 years, 4 months ago

In case of answer in chemistry.. When elements of group 15 are dopped with elements of group 14, the mixture or a type of compound we get is n-type semiconductor. They are electron rich semiconductor and these electron flows the cirrent in them.

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Nipu Jeet Rajbongshi 8 years, 4 months ago

When pentavelent atom are doped in a semiconductor,it release an electron and thus typ of semiconductor are called n-semiconductor.

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What is role of depressant in froth flotation process?

Posted by Siya Bishnoi 8 years, 4 months ago

CBSE > Class 12 > Chemistry

1 answers

Malkeet Singh 8 years, 4 months ago

Depressant are substances which are used to seperate two sulphide ores in froth floatation ex.NACN for pbS and ZnS ores

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What is edima

Posted by Priyanshu Kumar 8 years, 4 months ago

CBSE > Class 12 > Chemistry

1 answers

Kritika Trehan 8 years, 4 months ago

Edema (or Oedema) is the abnormal accumulation of fluid in certain tissues within the body. The accumulation of fluid may be under the skin - usually in dependent areas such as the legs (peripheral edema, or ankle edema), or it may accumulate in the lungs (pulmonary edema).

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Which compound has higher BP NH3,PH3,AsH3,SbH3BiH3

Posted by Tushar Batra 8 years, 4 months ago

CBSE > Class 12 > Chemistry

3 answers

Tanmay Joshu 8 years, 4 months ago

I thing BiH3 . As per my memory ..,,B.P are 238,185,210,255,289 rspctively as asked in ques.. check it.

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Prajjwal Gupta 8 years, 4 months ago

NH3

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Chirag Khandelwal 8 years, 4 months ago

NH3. ...........as it forms hydrogen bonding which is difficult to break n hence results in increase boiling point.......

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Why is glass consider a super cooled liquid

Posted by Amrit Prakash 8 years, 4 months ago

CBSE > Class 12 > Chemistry

2 answers

Chirag Khandelwal 8 years, 4 months ago

As glass has the tendency to Flow though very slowly like a liquid hence known as super cooled liquid....... (bt it takes millions of years to flow)

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Kritika Trehan 8 years, 4 months ago

Glass is sometimes called a supercooled liquid because it does not form a crystalline structure, but instead forms an amorphous solid that allows molecules in the material to continue to move. However, Scientific American indicates that amorphous solids are neither supercooled liquids nor solids.

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n-butyl bromide has higher boiling point than t-butyl bromide .why?

Posted by Rashi Sharma 8 years, 4 months ago

CBSE > Class 12 > Chemistry

1 answers

Malkeet Singh 8 years, 4 months ago

Because boiling point inversly proportional to branching since tbutylbromide has branching so it has lower boiling point

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What is spectrochemical series

Posted by Poonam Singha 8 years, 4 months ago

CBSE > Class 12 > Chemistry

1 answers

Kritika Trehan 8 years, 4 months ago

A spectrochemical series is a list of ligands ordered on ligand strength and a list of metal ions based on oxidation number, group and its identity

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How would u account for. Following. A transition metals exhibit variable oxidation state. B ZR and HF have identical radii. C transition metals are. use as catalyst.

Posted by Pranay Thakre 8 years, 4 months ago

CBSE > Class 12 > Chemistry

0 answers

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Name of this compound NH4OH

Posted by Gouravi Gupta 8 years, 4 months ago

CBSE > Class 12 > Chemistry

2 answers

Rahul Dubey 8 years, 4 months ago

Ammonium hydroxide

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Sadia Salim 8 years, 4 months ago

Ammonium hydroxide

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Complete the equation ... Ag reacts with pcl 5

Posted by Xxxxx Xxxx 8 years, 4 months ago

CBSE > Class 12 > Chemistry

1 answers

Rahul Dubey 8 years, 4 months ago

2Ag + PCl5 ---------> 2AgCl + PCl3.

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Is there is chemistry invetigatory project going on ,In any school . Where can i get help for that

Posted by Kshitij Mathur 8 years, 4 months ago

CBSE > Class 12 > Chemistry

0 answers

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How to learn P block elements? P block is too large and it is very difficult to learn structures.

Posted by Rahul Agrawal 8 years, 4 months ago

CBSE > Class 12 > Chemistry

3 answers

Tanmay Joshu 8 years, 4 months ago

Grp 17..... Fir kal bahr aai anty.. F....Cl...Br...I......At

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Tanmay Joshu 8 years, 4 months ago

Grp 18 Hena Nena Aur Karina Sare Rangin.. 'He' 'Ne' 'Ar' 'kr' 'Xe' 'Rn' Helium,neon,argon,krypton,xenon,radon

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Sagar Sagar 8 years, 4 months ago

Try scanner in which you practice lots and lots structures and conceptual questions

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What is gangue?

Posted by Siya Bishnoi 8 years, 4 months ago

CBSE > Class 12 > Chemistry

2 answers

Pawan Kumar 8 years, 4 months ago

The unwanted material which are found in minirals arw called gangue

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Rahul Agrawal 8 years, 4 months ago

Unwanted matrials found in minerals are calle gangue

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The melting points and solubility in water of amino acid are generally higher than that of the corresponding halo acids.Explain

Posted by Hiral Jain 8 years, 4 months ago

CBSE > Class 12 > Chemistry

0 answers

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Why can not primary aliphatic amine be prepare directly

Posted by Hritik Sharma 8 years, 4 months ago

CBSE > Class 12 > Chemistry

0 answers

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What are mild oxidising agent

Posted by Manav Deol 8 years, 4 months ago

CBSE > Class 12 > Chemistry

1 answers

Rajesh Kashyap 8 years, 4 months ago

Br2 aq.

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d4Or d7 which orbital is more stable and why

Posted by Shagun Sharma 8 years, 4 months ago

CBSE > Class 12 > Chemistry

0 answers

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Why are hydrogen halide not halogen acid preferred for preparing haloalkane from alkanes

Posted by Amisha Deswal 8 years, 4 months ago

CBSE > Class 12 > Chemistry

0 answers

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what is hybridization

Posted by Manjeet Singh 8 years, 4 months ago

CBSE > Class 12 > Chemistry

0 answers

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Why picric aci is a acid

Posted by Akshay Panwar 8 years, 4 months ago

CBSE > Class 12 > Chemistry

2 answers

Mini Singhal 8 years, 4 months ago

U r not uttam thakur u r anuttam

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Uttam Thakur 8 years, 4 months ago

when phenol is treated with conc. nitric acid then the picric acid is formed.

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Distinguish between n type semiconductor & p-type semiconductor

Posted by Garina Jakhar 8 years, 4 months ago

CBSE > Class 12 > Chemistry

1 answers

Lisa Yadav 8 years, 4 months ago

In n-type semiconductors conductivity develops due to extra electron. It can be occur by doping or adding impurities like P and As to Silicon. In p-type semiconductors conductivity develops due to extra holes. It can be occur by doping B and AL to silicon.

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What is the reaction for Hoffman ammonolysis

Posted by Garina Jakhar 8 years, 4 months ago

CBSE > Class 12 > Chemistry

1 answers

Mansi Kaushal 8 years, 4 months ago

R-CONH2 + Br2 + KOH ➡RNH2+ KBr+ K2CO3

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How to attempt conversion I studied the whole chapter and wasn't able to do it

Posted by Nitin Sharma 8 years, 4 months ago

CBSE > Class 12 > Chemistry

1 answers

Mansi Kaushal 8 years, 4 months ago

Learn the basics like what'd u need to add a carbon or for descending or ascending of chain or some basic concepts like that. While attempting the conversion just observe the reactant and product then see what u need to add or subtract and use the reagent accordingly. It's easy just ensure the path to be followed is right. ?

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Melting point of mercury

Posted by Elan Ayrkpam 8 years, 4 months ago

CBSE > Class 12 > Chemistry