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How many chapter in which consists numerical questions. .and only numerical questions comes in board exam??????

Posted by Kunal Adhana 7 years ago

2 answers

No it is not possible that only numericals are there in exams. Only 10 to 12 marks numerical questions are to be asked in our chemistry exam .

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Mansi Sharma 7 years ago

First four chapters are having numericals ...

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Benzene to methyl benzoate

Posted by Dikshita Shah 7 years ago

CBSE > Class 12 > Chemistry

1 answers

Robinson Oranges 7 years ago

1.convert benzene to benzaldehyde by gatterman koch rxn2. Oxidise benzaldehyde to benzoic acid by using alk KMnO4 3. Esterification : add methanol to benzoic acid we get methyl benzoate.this is one of the easiest methods

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???OPEN CHALLANGE??? Convet ethanoic acid into glycine in at least 5 steps .....if you don't know what is glycine refer NCERT or google......

Posted by H!Mαη$Hμ Ұαδαυ ✔️ 7 years ago

CBSE > Class 12 > Chemistry

3 answers

H!Mαη$Hμ Ұαδαυ ✔️ 7 years ago

Listen if you use NH3 it will form complex with COOH group

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H!Mαη$Hμ Ұαδαυ ✔️ 7 years ago

This is wrong

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Nitika Neb 7 years ago

Through HVZ reaction , chloroacetic acid ( ClCH2COOH ) can be prepared and next adding some ammonia solution to the product yields glycine , Note that it is only the inorganic way for conversion of acetic acid to glycine , while in reality , glycine is synthesised in our body by organic reactions ClCH2COOH + 2 NH3 → H2NCH2COOH + NH4Cl

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Conversion of ethanol into propenal

Posted by Vikas Nain 7 years ago

CBSE > Class 12 > Chemistry

5 answers

Ankush Sharma 7 years ago

First we will convert ethanol into ethylhalide than we will add grignard reagant than we will get propane then we will add aq KOH and get propanol than do its oxidation

1Thank You

Arsh Sidhu 7 years ago

yes you are right after doing oxidation with a oxidising agent such as kmno4

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H!Mαη$Hμ Ұαδαυ ✔️ 7 years ago

Answer is (1) first use Cu 573K to oxidise ethanol to form ethanal .......(2) then add methnol in ethanal with dil NaOH { Aldol Condensation } and heat it ...you will get propenal... ....

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H!Mαη$Hμ Ұαδαυ ✔️ 7 years ago

Wrong answer ashish???

1Thank You

Ashish Bhati 7 years ago

Do the oxidation of ethanol(alcohol) then you will get propenal(aldehyde)

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What are the applications of reverse osmosis

Posted by Jyoti Gautam 7 years ago

CBSE > Class 12 > Chemistry

2 answers

Àñshul Shärmã 7 years ago

1).... In the purification of water 2).....In wastewater treatment. 3)..... In concentration. Processes

2Thank You

Ashish Bhati 7 years ago

It is used to extract salt from sea water

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Estimation of Acid and basic radicals practical

Posted by Aman Bhardwaj 7 years ago

CBSE > Class 12 > Chemistry

0 answers

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In carius method of estimation of halogen 0.30g of organic compound gave 0.24 g of AgBr find out % of bromine

Posted by Jitisha Kalra 7 years ago

CBSE > Class 12 > Chemistry

0 answers

ANSWER

What is +I nd +R effect..?

Posted by Neelesh Pandey 7 years ago

CBSE > Class 12 > Chemistry

0 answers

ANSWER

Hydration enthalpy?

Posted by Krishnendu S K 7 years ago

CBSE > Class 12 > Chemistry

1 answers

Deepak Jindal 7 years ago

The energy released when an ion is surrounded by water molecules due to dipole interactions is called hydration enthalpy.

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Why does nitrogen not shows pentavalent state

Posted by Tushar Chaudhary 7 years ago

CBSE > Class 12 > Chemistry

1 answers

Neelesh Pandey 7 years ago

Bcz of the absence of d orbital Nitrogen doesn't show pentavalent state nd hence does not form pentavalent compounds.

1Thank You

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When a coordination compound CrCl3.6H2O is mixed with AgNO3, 2 moles of AgCl are precipitated per mole of the compound. Write the structural formula and IUPAC name of the complex.

Posted by Iris Wilson 7 years ago

CBSE > Class 12 > Chemistry

1 answers

Yuvraj Singh 7 years ago

[Cr (H20)5 cl] cl2 IUPAC name - pentaaquachloridochromium(3)chloride

1Thank You

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zno crystal on heating acquire the formula zn 1+×.O.give reason

Posted by Subodh Chaudhary 7 years ago

CBSE > Class 12 > Chemistry

1 answers

Ajay Arya 7 years ago

On heating zno,it loses oxygen and there is excess of zn2+ ion in the crystal

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Name of pure water

Posted by Lucky Pandit 7 years ago

CBSE > Class 12 > Chemistry

1 answers

Tikishree Menaka Murmu 7 years ago

DI-HYDROGEN OXIDE

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ANSWER

Hydrocarbon

Posted by Vivek Maurya 7 years ago

CBSE > Class 12 > Chemistry

1 answers

Tikishree Menaka Murmu 7 years ago

It is an organic compound consisting of entirely hydrogen and carbon atom.

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ANSWER

Three elements xy and Z have atomic number 7 8 and 9 respectively. (a) state their position (group number and period number both) in the modern period table. (b) arrange these elements in the decreasing order of their atomic Radii. (c) write the formula of the compound formed when X combines with Z

Posted by Ankush Singh 7 years ago

CBSE > Class 12 > Chemistry

1 answers

Ankush Singh 7 years ago

Stop

1Thank You

ANSWER

What is acetal

Posted by Nityam Nischal 7 years ago

CBSE > Class 12 > Chemistry

1 answers

Shrey Shekhar 7 years ago

R2C(OR')2

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what are the important topics in chemistry(chapter wise)??

Posted by Aadhil Abubacker 7 years ago

CBSE > Class 12 > Chemistry

3 answers

Priya Singh 7 years ago

Only NCERT ki book pdo Intex questions and exercise

3Thank You

O Singh 7 years ago

Polymer-classification and different polymer imp-PHBV,glyptal,nylon 6,buna -S

3Thank You

O Singh 7 years ago

Organic-all naming reaction ,distinguish test, ncert conversions

4Thank You

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what is meant by rate constant

Posted by Aadhil Abubacker 7 years ago

CBSE > Class 12 > Chemistry

0 answers

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What is counter ion?

Posted by Arbaz Turk 7 years ago

CBSE > Class 12 > Chemistry

1 answers

O Singh 7 years ago

Ion outside the coordination Sphere

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What is strong field ligands

Posted by Rafe Khan 7 years ago

CBSE > Class 12 > Chemistry

1 answers

Yogita Ingle 7 years ago

Strong field ligands are formed when the crystal field stabilisation energy (Δ0) is greater than the p.
Strong field ligands are called low spin complexes.
Strong field ligands are mostly diamagnetic or less paramagnetic than weak field.

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Conversion of but-1-ene to but-2-ene

Posted by Abhishek Mewada 7 years ago

CBSE > Class 12 > Chemistry

0 answers

ANSWER

Solution of sample paper 1of 2018 19 EAD

Posted by Krishan Yadav 7 years ago

CBSE > Class 12 > Chemistry

0 answers

ANSWER

What are binary compounds?

Posted by Arushi Priya 7 years ago

CBSE > Class 12 > Chemistry

1 answers

Ayush Kumar Gupta 7 years ago

Compounds having 2 reacting species

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B D glucose pentose O is why

Posted by Shahrukh Silavat 7 years ago

CBSE > Class 12 > Chemistry

0 answers

ANSWER

CuSO4+PH3

Posted by Vedika Chavan 7 years ago

CBSE > Class 12 > Chemistry

1 answers

Mohit Sepat 7 years ago

Cu3P2 and H2So4

1Thank You

ANSWER

Complete the reaction NaOH+Cl2

Posted by Vedika Chavan 7 years ago

CBSE > Class 12 > Chemistry

3 answers

Mansi Sharma 7 years ago

2NaOH + Cl2 = NaCl + NaClO +H2O

1Thank You

Mohit Sepat 7 years ago

NaCl n Naocl

0Thank You

Ammu Gill 7 years ago

Nacl+H2o

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Project of food and adulltrasion

Posted by Sandeep Chaurasiya 7 years ago

CBSE > Class 12 > Chemistry

0 answers

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What is love

Posted by Anand Ranjan 7 years ago

CBSE > Class 12 > Chemistry

2 answers

????? ???? 7 years ago

Ranjan bora gya hai..

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Mansi Sharma 7 years ago

What nonsense is this? Stop asking these types of questions in this study app ...

4Thank You

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What is permenant hard water

Posted by Subham Kumar 7 years ago

CBSE > Class 12 > Chemistry

1 answers

Yogita Ingle 7 years ago

When the soluble salts of magnesium and calcium are present in the form of chlorides and sulfides in water, we call it permanent hardness because this hardness cannot be removed by boiling. We can remove this hardness by treating the water with washing soda. Insoluble carbonates are formed when washing soda reacts with the sulfide and chloride salts of magnesium and calcium. And thus hard water is converted to soft water.

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Write the synthesis of bakelite

Posted by Manoj Kumar 7 years ago

CBSE > Class 12 > Chemistry