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

No products in the cart.

Ask questions which are clear, concise and easy to understand.

Ask Question

How will you prepare ethyl iodide from an alcohol

Posted by Neil Modi 3 years, 6 months ago

1 answers

Diya Singh 3 years, 6 months ago

Ethyl iodide is prepared by using red phosphorus, absolute alcohol and iodine. the iodine dissolve in the alcohol where it react with the solid phosphorus to form phosphorus triiodide, which must be formed in situ because it is unstable. During the process the temperature is controlled.

0Thank You

ANSWER

How will you prepare 1-bromopropane from alcohol

Posted by Neil Modi 3 years, 6 months ago

CBSE > Class 12 > Chemistry

1 answers

Shraddha Verma 3 years, 5 months ago

First prepare haloalkane such as 1 bromo ethane from alcohol by treating it with SOCl2 and then apply Wurtz rn to prepare propane from 1 bromo ethane and then do halogenation of propane by adding Br2

2Thank You

ANSWER

How will you prepare 2-bromopropane from an alcohol

Posted by Neil Modi 3 years, 6 months ago

CBSE > Class 12 > Chemistry

0 answers

ANSWER

How will you prepare tert.butyl chloride from an alcohol

Posted by Neil Modi 3 years, 6 months ago

CBSE > Class 12 > Chemistry

0 answers

ANSWER

How will you prepare sec.butyl bromide from an alcohol

Posted by Neil Modi 3 years, 6 months ago

CBSE > Class 12 > Chemistry

0 answers

ANSWER

plz provide formula sheet of chapter 3

Posted by Shruti Goel 3 years, 6 months ago

CBSE > Class 12 > Chemistry

1 answers

Anurag Saral 3 years, 5 months ago

make on your own.... hahaha

0Thank You

ANSWER

Liquid oxygen is used in?

Posted by Pratik Singh 3 years, 6 months ago

CBSE > Class 12 > Chemistry

2 answers

Black Panther 3 years, 6 months ago

Oxygen cylinder now a days in corona time liquid oxygen is helpful.

1Thank You

Muskan Saini 3 years, 6 months ago

Liquid oxygen has a density of 1.41g cm -3 and a boiling point -182 .

3Thank You

ANSWER

Why N2 is Inert at room temperature???

Posted by Black Panther 3 years, 6 months ago

CBSE > Class 12 > Chemistry

4 answers

Gaurav Bagga 3 years, 6 months ago

Because of effective pπ-pπ bonding be 2 nitrogen

2Thank You

Black Panther 3 years, 6 months ago

Can it be high bond dissociation enthalpy.

2Thank You

Tanya ?? 3 years, 6 months ago

Because of presence of triple bond..

2Thank You

Devil ? 3 years, 6 months ago

Due to strong triple bond bw the atomscof nitrogen

2Thank You

ANSWER

Convert Nitrobenzeto Acetaldehyde

Posted by Sathya Sathya 3 years, 6 months ago

CBSE > Class 12 > Chemistry

0 answers

ANSWER

Assertion in close packing of sphere a tetrahedral void is surrounded by 4 sphere whereas an octahedral void is surrounded by 6 sphere Reason A tetrahedral void has a tetrahedral shape where as an octahedral void has an octaheral shape

Posted by Virat Ahuja 3 years, 6 months ago

CBSE > Class 12 > Chemistry

0 answers

ANSWER

Mam structure formula of hex-2-en-4-ynoic acid..?

Posted by Pranav Choubey 3 years, 6 months ago

CBSE > Class 12 > Chemistry

2 answers

Shaziya Banu 3 years, 5 months ago

C5H5cooh

0Thank You

Black Panther 3 years, 6 months ago

C5H5cooh

0Thank You

ANSWER

Name the softest metal?

Posted by Muskan Saini 3 years, 6 months ago

CBSE > Class 12 > Chemistry

5 answers

Muskan Saini 3 years, 5 months ago

1Thank You

Savya Sachi Pati Tripathi 3 years, 5 months ago

Hello

1Thank You

Muskan Saini 3 years, 6 months ago

Tq ? both of ?u

2Thank You

Papa Hu 3 years, 6 months ago

Caesium is considered to be the softest metal

1Thank You

Pankaj Kumari 3 years, 6 months ago

Cesium

2Thank You

ANSWER

Why is the dipole moment of CH4 zero?

Posted by Muskan Saini 3 years, 6 months ago

CBSE > Class 12 > Chemistry

2 answers

Muskan Saini 3 years, 5 months ago

Tq dear

1Thank You

Divyanka Krishna 3 years, 6 months ago

In methane if you carefully look at the structure then you will observe that carbon is bonded to the same element from all sides. Hydrogen molecule cancel out the dipole moment of each. ( I just explained it don't write for your exam)

1Thank You

ANSWER

phenomenon. Electrochemical principles are relevant to the Hydrogen Economy. 3.1 Arrange the following metals in the order in which they displace each other from the solution of their salts. Al, Cu, Fe, Mg and Zn. 3.2 Given the standard electrode potentials

Posted by Satbir Singh 3 years, 6 months ago

CBSE > Class 12 > Chemistry

3 answers

Muskan Saini 3 years, 6 months ago

Jada chota na ha Aapka ques

1Thank You

Muskan Saini 3 years, 6 months ago

Or chot likdata question?

1Thank You

Nik . 3 years, 6 months ago

0Thank You

ANSWER

A solid is formed and it has three types of atoms X,Y,ZX forms an FCC lattice with Y atoms occupying one-fourth of tetrahedral voids and Z atorna occupying half of the octahedral voids. The formula of the solid is

Posted by Nivetha Nive 3 years, 6 months ago

CBSE > Class 12 > Chemistry

2 answers

Ak Kumar 3 years, 6 months ago

X2 Y1 Z1

2Thank You

Pankaj Kumari 3 years, 6 months ago

X4 Y8 Z2 or X2 Y4 Z1

1Thank You

ANSWER

Classify unit cell on the basis of position of constituent particles in them

Posted by Vikas Chauhan 3 years, 6 months ago

CBSE > Class 12 > Chemistry

2 answers

Aman ❤️ 3 years, 6 months ago

Three types simple...fcc nd bcc

0Thank You

Aman ❤️ 3 years, 6 months ago

Simple cubic Face centred cubic Body centred cubic

0Thank You

ANSWER

What is ionisation energy?

Posted by Atharva Verma 3 years, 6 months ago

CBSE > Class 12 > Chemistry

2 answers

Anjali Shukla 3 years, 6 months ago

Ionisation energy required to remove the most loosely bound electron of an isolated neutral gaseous atom or molecule.

2Thank You

Vandana Kumari 3 years, 6 months ago

Minimum amount of energy required to remove the most loosly bound electron of any gaseous atom Or molecule

1Thank You

ANSWER

How will you convert: Ethane to but- 1-yne

Posted by Arya Sharma 3 years, 6 months ago

CBSE > Class 12 > Chemistry

1 answers

Black Panther 3 years, 6 months ago

Wurtz reaction se hoga

0Thank You

ANSWER

Arrange the following in increasing order of basic strength: aniline, Ethanamine, N, N-Dimethylethanamine.

Posted by Arya Sharma 3 years, 6 months ago

CBSE > Class 12 > Chemistry

0 answers

ANSWER

Describe the structure of noble gas species XeOF4.

Posted by Arya Sharma 3 years, 6 months ago

CBSE > Class 12 > Chemistry

0 answers

ANSWER

Write the mechanism of dehydration of ethanol to give ethene.

Posted by Arya Sharma 3 years, 6 months ago

CBSE > Class 12 > Chemistry

1 answers

Black Panther 3 years, 6 months ago

First make it react with h2so4 (con) h+ will attach to o of c2h5o:h lone pair o ke pass hai. Fir h2o niklega aur fig hso4- ayega aur 1 h from c2h5 me se leke jayega aur apke pass bachega c2h4(ethene).

0Thank You

ANSWER

1.What is molecularity of a reaction? 2.With the help of an example explain pseudo first order reaction.

Posted by Arya Sharma 3 years, 6 months ago

CBSE > Class 12 > Chemistry

0 answers

ANSWER

Identify the compound that on hydrogenation produces an optically active compound from the following compounds: 3-Bromopent-3-ene OR 4-Bromopent-2-ene

Posted by Arya Sharma 3 years, 6 months ago

CBSE > Class 12 > Chemistry

0 answers

ANSWER

Calculate the freezing point of aqueous solution 0.05m solution of Al2(So4)3 assuming it is completely ionized. [Kf= 1.86k kg/mol, Molar Mass of Al=27g/mol and S=32g/mol].

Posted by Arya Sharma 3 years, 6 months ago

CBSE > Class 12 > Chemistry

0 answers

ANSWER

Write IUPAC name of [Crcl2(H2O)4]^+ and explain it's hybridization.

Posted by Arya Sharma 3 years, 6 months ago

CBSE > Class 12 > Chemistry

2 answers

Divyanka Krishna 3 years, 6 months ago

It's Tetraaquodichloridochromium(III)ion {Whenever there is a charge outside the coordination sphere then put ion in the name} Hybridiai - octahedral Reason bonded to 4 water molecules and 2 chlorine hence 4+2= 6

0Thank You

Black Panther 3 years, 6 months ago

Tetra aqua chloro chromate.

0Thank You

ANSWER

Bond angle in ph4' is higher than in ph3

Posted by Jayant Patidar 3 years, 6 months ago

CBSE > Class 12 > Chemistry

1 answers

Divyanka Krishna 3 years, 6 months ago

In ph3 there is presence of lone pair which causes repulsion between bond pair and lone pair increasing the bond angle. In ph4+ bond angle is smaller due to no lone pair and repulsion between bond pair-bond pair is less than lone pair- bond pair.

0Thank You

ANSWER

Calculate the molality of NaCl in an aqueous solution in which the mole fraction of NaCl is 0.100 ??

Posted by Priti Sangwan 3 years, 6 months ago

CBSE > Class 12 > Chemistry