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

It's stand for potassium cyanide. This is a colourless crystalline salt. Similarly to the sugar. It is highly soluble in water. It is used for jewellery.

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Nandini Shukla 3 years, 4 months ago

It increases one cabon atom in product

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ANSWER

Anyone know Cacl

Posted by Snehil J@@T 3 years, 4 months ago

CBSE > Class 12 > Chemistry

2 answers

Rakesh Agrawal 3 years, 3 months ago

Calcium chloride

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Bhumika Agrawal 3 years, 4 months ago

It is calcium chloride

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ANSWER

What is electrochemostry

Posted by Ashirvad Mishra 3 years, 4 months ago

CBSE > Class 12 > Chemistry

2 answers

Bhumika Agrawal 3 years, 4 months ago

Electrochemistry is the branch of chemistry which deals with the electrical in chemical

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Siddhant Singh 3 years, 4 months ago

In which we study about the size , structure and composition of the electron. ?

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What is mass by volume percentage

Posted by Karan Bhatt 3 years, 4 months ago

CBSE > Class 12 > Chemistry

2 answers

Sia ? 3 years, 4 months ago

The mass/volume percent of a solution is defined as the ratio of the mass of solute that is present in a solution, relative to the volume of the solution, as a whole. Because this type of concentration is expressed as a percentage, the indicated proportion must be multiplied by 100, as shown below.

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Bhumika Agrawal 3 years, 4 months ago

It can be defined as the ratio of mass of solute that present in the solution (in g) / the volume of the solution (in L)× 100

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Suggest a way to determine the ^°m value of water

Posted by Smita Kurmi 3 years, 4 months ago

CBSE > Class 12 > Chemistry

1 answers

Bhumika Agrawal 3 years, 4 months ago

Plzz check the question because i think this question is incomplete

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What is meant by reaction rate ?

Posted by Venkat Balaji 3 years, 4 months ago

CBSE > Class 12 > Chemistry

3 answers

Bhumika Agrawal 3 years, 4 months ago

It is also known as rate of reaction it is defined as duck increasing the concentration of product per unit time and to decrease in the reactant Per unit time it is depend on order reaction

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Venkat Balaji 3 years, 4 months ago

- dr / dt

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Kabita Sharma 3 years, 4 months ago

Reaction rate is defined as ratio of change in product/reactant concentration with respect to change in time. Rate=dR\dt or Rate =dP/dt

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The vapour pressure of water is 12.3kPa at 300k. Calculate the vapour pressure of 1 molar solution of a solute in it.

Posted by Rishav Raj 3 years, 4 months ago

CBSE > Class 12 > Chemistry

1 answers

Kabita Sharma 3 years, 4 months ago

Molar mass of water is=18 g/mol No. Of Mole present in 1000g of water 1000/18=55.56 mol Mole fraction(Xi)= amount of constituent in moles/Total amount of constituents in a mixture in moles Xi=1/1+55.6 = 0.0177 As we know that relative lowering in vapour pressure is equal to the mole fraction of the solute. p1-p\p=X 12.3-p/12.3=0.0177 p=12.08

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Is iupac naming is useful for +2 science

Posted by Ganesh Gonga 3 years, 4 months ago

CBSE > Class 12 > Chemistry

3 answers

Khushi Kumari 3 years, 4 months ago

Yes IUPAC naming is important as questions related to IUPAC naming were given in NCERT book of class 11th and 12th both

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Ganesh Gonga 3 years, 4 months ago

Thank u bri

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Ishant Dixit 3 years, 4 months ago

Iupac is basic but not important in class 12

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ANSWER

Titration

Posted by Paras Douglas Thomas Pattinson 3 years, 4 months ago

CBSE > Class 12 > Chemistry

1 answers

Kabita Sharma 3 years, 4 months ago

Practical method involving redox reactions where tirant when added to the solution of unknown strength undergoes oxidation reduction reaction untill a permanent color is obtained as the end of the reaction . There are several indicators that give certain color to reaction which indicative of completion of the titration reaction. Eg: Universal indicators, KMnO4 self indicator and also used as tirant. Eg of titration reaction: MnO4+. + C2O4- + H+ ----->Mn2+ + CO2 + H20

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Arrange the following elements in decreasing order of atomic radii Ca, Mg, P and Cl

Posted by Atul Verma 3 years, 4 months ago

CBSE > Class 12 > Chemistry

1 answers

Kabita Sharma 3 years, 4 months ago

Mg(12)<P(15)<Cl(17)<Ca(20) decreasing order of atomic radii .

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A metal crystallises in body-centred cubic lattice. Edge length of unit cell is 362 pm. Calculate the closest atom between two metal atoms.

Posted by Anubhav Srivastava 3 years, 4 months ago

CBSE > Class 12 > Chemistry

2 answers

Bhumika Agrawal 3 years, 4 months ago

Answer is 53

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Bhumika Agrawal 3 years, 4 months ago

This is wrong questions Body centred cubic is replaced with face centered cubic

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A 5%solution of cane sugar in water has

Posted by Gouri Nandana 3 years, 4 months ago

CBSE > Class 12 > Chemistry

2 answers

Siddhant Singh 3 years, 4 months ago

Yep

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Bhumika Agrawal 3 years, 4 months ago

Puchana kya chaha rhi ho

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ANSWER

What is n type and p type semiconductor

Posted by Sneha Kumari 3 years, 4 months ago

CBSE > Class 12 > Chemistry

1 answers

Bhumika Agrawal 3 years, 4 months ago

N type = negative P type = positive

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ANSWER

What is frenkal defect

Posted by Bhumika Agrawal 3 years, 4 months ago

CBSE > Class 12 > Chemistry

1 answers

Tannu Rao 3 years, 4 months ago

In an ionic solid, when the smaller ion (usually cation) leaves its lattice site and occupy interstitial site, this defect is known as frenkel defect. It is also called dislocation defect.

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Relation between r and R

Posted by Bhumika Agrawal 3 years, 4 months ago

CBSE > Class 12 > Chemistry

1 answers

Siddhant Singh 3 years, 4 months ago

Dependency btyo dono ki jbhi to relation define hoga

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*The rate of a reaction involving only reactant P becomes four times when concentration of P is doubled. The order of the reaction is:* 1️⃣ 1 2️⃣ 2 3️⃣ 3 4️⃣ 0

Posted by Reshma Kumari 3 years, 4 months ago

CBSE > Class 12 > Chemistry

3 answers

Bhumika Agrawal 3 years, 4 months ago

R=k [P]^x (1) equation R'=k [2P]^x=4 (2) equation Solve it x=2 It is a second order derivative

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Tannu Rao 3 years, 4 months ago

R = k [A] ^2 if we double A, rate will become four times

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Tannu Rao 3 years, 4 months ago

Second order reaction.

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ANSWER

The charge required for the reduction of 1 mole of mnO4 to mnO2

Posted by Sohal Mog 3 years, 4 months ago

CBSE > Class 12 > Chemistry

1 answers

Tannu Rao 3 years, 4 months ago

Oxidation state of Mn in KMnO4 ---> +7 , in MnO2 ---> +4. Therefore 3 Farad charge is required

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How does VBT explain the formation of octahedral complexes

Posted by Pradeep Singh 3 years, 4 months ago

CBSE > Class 12 > Chemistry

0 answers

ANSWER

What is the formula of water

Posted by Anish Sharma 3 years, 4 months ago

CBSE > Class 12 > Chemistry

5 answers

Ishu Panoiya 3 years, 4 months ago

H20

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Waseem Akhtar 3 years, 4 months ago

H2O

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Pushkar Pandey 3 years, 4 months ago

H2O

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Gagandeep Malhyan 3 years, 4 months ago

H2o

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Anish Sharma 3 years, 4 months ago

H2O

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ANSWER

What is electromotive force of a cell?

Posted by Atul Yadav 3 years, 4 months ago

CBSE > Class 12 > Chemistry

1 answers

Tannu Rao 3 years, 4 months ago

Work done to move a unit test charge inside a cell from negative terminal to positive terminal in absence of its internal resistance or when the cell is open circuited is called electromotive force of a cell.

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a solution containing 18g of non volatile solute at 200g of h2o freezes at 272.07 k.find the molecular mass of the solute?

Posted by Prajakta Chhetri 3 years, 4 months ago

CBSE > Class 12 > Chemistry

2 answers

Adity Gupta 3 years, 4 months ago

Ess question me kh ki value nhi hai question is in complete

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Ishant Dixit 3 years, 4 months ago

Number of mass/total mass multiply by 100 kar do

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ANSWER

If any one has has question bank of class 12 of all chapters please send me

Posted by Kushagra Singh 3 years, 4 months ago

CBSE > Class 12 > Chemistry

1 answers

Adity Gupta 3 years, 4 months ago

No sorry

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Name the binding force in. Metallic solid

Posted by Rashi Shetty 3 years, 4 months ago

CBSE > Class 12 > Chemistry

2 answers

Tannu Rao 3 years, 4 months ago

Metallic bonding

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Adity Gupta 3 years, 4 months ago

Force that holds atoms together in metallic substance

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What is conductivity????

Posted by Akhilesh Chauhan 3 years, 4 months ago

CBSE > Class 12 > Chemistry

4 answers

Siddhant Singh 3 years, 4 months ago

Ability to conduct electricity

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Vishal Singh 3 years, 4 months ago

Conductivity is reciprocal of resistivity

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Sujit Yadav 3 years, 4 months ago

Property of any body to let pass the electric current through it

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Sumit Kumar 3 years, 4 months ago

Inverse of resistivity

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What type of interaction hold the molecules together in a polar molecular solid?

Posted by Th Henba 3 years, 4 months ago

CBSE > Class 12 > Chemistry

5 answers

Vishal Singh 3 years, 4 months ago

Dipole dipole interactions

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Adity Gupta 3 years, 4 months ago

Dipole interaction

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Akhilesh Chauhan 3 years, 4 months ago

Dipole dipole

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Pratyush Sahoo 3 years, 4 months ago

Dipole dipole interaction

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Ricky_Romeo _Raaz 3 years, 4 months ago

Electromagnetic force

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Comapre the acidity of phenol and ethanol with diagram

Posted by Ashish Singh 3 years, 4 months ago

CBSE > Class 12 > Chemistry

1 answers

Kabita Sharma 3 years, 4 months ago

Phenol +water ----->Phenoxide ion + hydronium ion Alcohol + NaNH2 -----> sodium ethoxide + NH3 Alcohol+ Na-----> Sodium alcoxide + H2 Here you can observe that phenols readily for hydronium ions (H30+)which is more acidic than H+ ion liberation.

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Preeti dabral plz tell me . Are you a teacher ? I hope so because you answered many of the questions asked by students .

Posted by Nishant Pandey 3 years, 4 months ago

CBSE > Class 12 > Chemistry