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define the polysaccharides

Posted by R@V¡Ndr@ R@V¡Ndr@ 6 years, 10 months ago

CBSE > Class 12 > Chemistry

1 answers

Kamal Pandey 6 years, 10 months ago

Those saccharides which produces large no of mono saccharide on hydrolysis.

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Ionic solids conduct electricity in molten state but not in solid state. Explain

Posted by Sahil Bhagat 6 years, 10 months ago

CBSE > Class 12 > Chemistry

1 answers

Silent Punk 6 years, 10 months ago

Ionic solid conduct electricity in molten state but not in solid stalid Because in molten state , electron can flow easily but in solid electron can not move freely.

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A compound forms hexagonal close packed structure. What is total number of voids in 0.5mol it

Posted by Alok Yadav 6 years, 10 months ago

CBSE > Class 12 > Chemistry

1 answers

Gurleen Kaur 6 years, 10 months ago

18.069×10^23

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How to find coordinate number of a face centered cubic unit cell

Posted by Aditi Keshri 6 years, 10 months ago

CBSE > Class 12 > Chemistry

0 answers

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Amorphous solid why show milky in looking?

Posted by Sachin Kumar 6 years, 10 months ago

CBSE > Class 12 > Chemistry

2 answers

Lalit Tiwari 6 years, 10 months ago

But is should be crystalline solids.

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Lalit Tiwari 6 years, 10 months ago

Due to regular heating and cooling. This process is annealing.

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Explain the following : (i) tert butylbenzene does not give benzoic acid on oxidation with acidic KMnO4 (ii) the carbonyl oxygen atom of a carboxylic acid is more basic than hydroxyl oxygen

Posted by Ramya Sri 6 years, 10 months ago

CBSE > Class 12 > Chemistry

0 answers

ANSWER

How to write salt analysis in practical exam? Do we have to write theory and apparatus used?

Posted by Noor Hurerah 6 years, 10 months ago

CBSE > Class 12 > Chemistry

1 answers

Neha ?? 6 years, 10 months ago

In salt analysis we need to write aim and the tests for anionic and cationic radical in tabular form and at last the result

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Why iron dissolves in HCl to form FeCl2 and FeCl3

Posted by Muskan Deshmukh 6 years, 10 months ago

CBSE > Class 12 > Chemistry

1 answers

Rahul Arya 6 years, 10 months ago

Because HCl is a reducing agent so it oxidise the Fe

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P-nitrochlorobenzene undergoes nucleophilic substitution faster than chlorobenzene. Explain structures as well.

Posted by Shiny Isha 6 years, 10 months ago

CBSE > Class 12 > Chemistry

1 answers

Lalit Tiwari 6 years, 10 months ago

It is because nitro group acts as electron withdrawing group.

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Define all magnetic properties

Posted by Hiva Ansari 6 years, 10 months ago

CBSE > Class 12 > Chemistry

1 answers

Gaurav Seth 6 years, 10 months ago

ome basic properties of magnets are as follows:

(i) Attractive property: Magnet attracts small pieces of iron, cobalt, nickel, etc. and this is attributed to it's attractive property.

(ii) Directive property: A freely suspended magnet aligns itself in the north-south direction.

(iii) Law of magnetic poles: Like poles repel and unlike poles attract each other.

(iv) Magnetic poles exist in pairs: It is impossible to obtain an isolated N-pole or South-pole. Whenever we break magnet into two pieces, we get two small dipole magnets.

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Is crystal field theory and valence bond theory imp?

Posted by Krishnendu S K 6 years, 10 months ago

CBSE > Class 12 > Chemistry

1 answers

Kunjika Singh Rajput 6 years, 10 months ago

Yes,if you're from cbse board then both questions are very imp but if you're from cg board then only vbt is more imp than cft....

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Explain the extraction of zinc from zinc blend?

Posted by Hemani Kamboj 5 years, 8 months ago

CBSE > Class 12 > Chemistry

0 answers

ANSWER

Which Chemical is the king of Chemical?

Posted by Prabhu Singh 6 years, 10 months ago

CBSE > Class 12 > Chemistry

1 answers

Srujan Devineni 6 years, 10 months ago

Sulphuric acid is also known as king of chemicals...it is used in automobiles to electrolyte lead batteries...?✌

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Describe a method of determining molar mass of a non volatile solute from vapour pressure lowering.

Posted by Vishal Vaibhav 6 years, 10 months ago

CBSE > Class 12 > Chemistry

0 answers

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Prove that rate of reaction becomes double for every 10° rise in temperature.

Posted by Shalu Kashyap 6 years, 10 months ago

CBSE > Class 12 > Chemistry

1 answers

Sneha Bansal 6 years, 10 months ago

Temperature coefficient ...

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Three antidepresent medicine

Posted by Ankita Singh 6 years, 10 months ago

CBSE > Class 12 > Chemistry

0 answers

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Role of co in extraction

Posted by Kk Shriram 6 years, 10 months ago

CBSE > Class 12 > Chemistry

1 answers

Harshit Rathi 6 years, 10 months ago

It acts as reducing agent It forms complex with the given compound and further decomposes to give back the pure metal

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The molality of 15%(wt./vol.)solution of sulphuric acid of density 1.1g/cm^3 is approximately--

Posted by Rakshanda Chandwani 6 years, 10 months ago

CBSE > Class 12 > Chemistry

0 answers

ANSWER

Nitrogen is much less reactive than phosphorus, why?

Posted by Sarpreet Singh Sidhu 6 years, 10 months ago

CBSE > Class 12 > Chemistry

2 answers

Sahil Saini 6 years, 10 months ago

When nitrogen forms triple bond with another nitrogen atom.this triple bond have very high bond strength.which is very difficult to break , nitrogen has a small size,forms pπ-pπ bond.this property is not exhibit by phosphorus.thus phosphorus is more reactive than nitrogen.

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Gangeshver Sharma 6 years, 10 months ago

Due to high electronegativity of N and absence of vacant d-orbital

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Hydrogen and oxygen gas can be stored for long time at room temperature without reaction; why?

Posted by Binod Kumar 5 years, 8 months ago

CBSE > Class 12 > Chemistry

0 answers

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Reactions

Posted by Vikrant Singh 6 years, 10 months ago

CBSE > Class 12 > Chemistry

1 answers

Shaurya Omar 6 years, 10 months ago

Name them?

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Cr+3 and Co+2 have same no. Of unpaired electrons but yet they have different magnetic momoent??

Posted by Sahil Dawara 6 years, 10 months ago

CBSE > Class 12 > Chemistry

2 answers

Sahil Dawara 6 years, 10 months ago

No cr+3 has 3 unpaired electrons

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Shaurya Omar 6 years, 10 months ago

Co+2 has 3 unpaired electrons and Cr+3 has 4 unpaired electrons.

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Respected Teacher....... Plzz tell me that what advantage would i get for having 6 subjects i.e i had physics, chemistry, mathematics, English, music, biology Plzz tell me...... Thanks

Posted by Anshika Babbar 6 years, 10 months ago

CBSE > Class 12 > Chemistry

1 answers

Piyush Bhatt 6 years, 10 months ago

No. Of best five subjects will be counted

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Name a compound in which oxidation state of transition metal is zero

Posted by Mohit Sepat 6 years, 10 months ago

CBSE > Class 12 > Chemistry

2 answers

Harshit Jindal 6 years, 10 months ago

[Fe(CO)5]

3Thank You

Rajat Singh 6 years, 10 months ago

[Cu(CN)]Cl

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When a benzene is connected with cooh group and aniline what will be its IUPAC name

Posted by Sweata Acharjee 6 years, 10 months ago

CBSE > Class 12 > Chemistry

1 answers

Shaurya Omar 6 years, 10 months ago

2Amino Benzoic Acid

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what are the topics which are not included in cbse exam thics year for class 12

Posted by Dharshika As 6 years, 10 months ago

CBSE > Class 12 > Chemistry

1 answers

Sneha Bansal 6 years, 10 months ago

Refer to syllabus -2019

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During the salt analgies ammonium chloride .how will be prepare soda extract and water extract how will be prepared original test.given on confirmately for each ions (dry test is not extable)

Posted by Ansh Yadav 6 years, 10 months ago

CBSE > Class 12 > Chemistry

0 answers

ANSWER

Plz anyone tell all distinguishing test and mechanism given in ncert plz

Posted by Kim Jong 6 years, 10 months ago

CBSE > Class 12 > Chemistry

0 answers

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Why h2o is liquid but h2s is gas

Posted by Priyanshu Dubey 6 years, 10 months ago

CBSE > Class 12 > Chemistry

3 answers

Gangeshver Sharma 6 years, 10 months ago

Due to hydrogen bonding in h2o

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H!Mαη$Hμ Ұαδαυ ✔️ 6 years, 10 months ago

Due to hydrogen bonding in H2O

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Yogita Ingle 6 years, 10 months ago

Whether a compound will be a solid, liquid or gas at a given temperature can be explained by the attractive forces between its molecules.
H₂S (hydrogen sulfide) is a gas because at room temperature the forces and interactions between the molecules of hydrogen sulfide are very weak.
The water molecule has a stronger dipole (a negatively and positively charged end to the individual molecule) so these negative and positive ends continually attract each other like magnets of opposite poles, creating more cohesion between the molecules of water--explaining the liquid phase.

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What is the smell of ferrous sulphate salt

Posted by Aryan Gaur 6 years, 10 months ago

CBSE > Class 12 > Chemistry