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A first orderreaction is 75% completed in 72min how long time will take it for 50%complection and 87.5 complection in detail with solution

Posted by Prabhat Prakash 7 years, 4 months ago

CBSE > Class 12 > Chemistry

0 answers

ANSWER

What is the relation between stable electronic configuration and pairing energy?

Posted by Shivali Shaji 7 years, 4 months ago

CBSE > Class 12 > Chemistry

0 answers

ANSWER

What happens when n-butyl chloride is treated with alcoholic KOH

Posted by Haresh Debbarma 7 years, 4 months ago

CBSE > Class 12 > Chemistry

2 answers

Krishna Gautam 7 years, 4 months ago

When n- butyl reacts with alcoholic KOH, then KOH gets higher energy by alcohol and then gets the ability to attack on any carbon atom by sn2 reaction thus, the halo atom and the hydrogen atom come out in the dorm of mineral acid... CH3-CH2-CH2-CH2-Cl -----------> CH3-CH2-CH=CH2 + HCl

Keerthi Sri 7 years, 4 months ago

Dehydrohalogenation occurs...A chlorine nd a hydrogen atom attached to the carbon atom next to the halogen....gets removed..

ANSWER

Why germs is die only 99.9% not 100% ???

Posted by Datyam Singh 7 years, 4 months ago

CBSE > Class 12 > Chemistry

1 answers

Aryan Rajput 7 years, 4 months ago

Exceptions are everywhere ?

ANSWER

Give examples of semiconductors.

Posted by Satyam Chimaniya 7 years, 4 months ago

CBSE > Class 12 > Chemistry

1 answers

Sweety Sweety 7 years, 4 months ago

Silicon ,germanium,galium

ANSWER

if the uncertainity in a position of as moving particle is 0 then find out momentum

Posted by Sameer Memon 7 years, 4 months ago

CBSE > Class 12 > Chemistry

2 answers

H!Mαη$Hμ Ұαδαυ ✔️ 7 years, 4 months ago

Sorry 100%

H!Mαη$Hμ Ұαδαυ ✔️ 7 years, 4 months ago

110%

ANSWER

what is super cooled liquids

Posted by Mamta Kajla 7 years, 4 months ago

CBSE > Class 12 > Chemistry

2 answers

Navjot Kaur 7 years, 4 months ago

Glass is an amorphous solid and it is an example of super cooled solid

Sweety Sweety 7 years, 4 months ago

Amorphous solids

ANSWER

why crystalline solids are called true solids

Posted by Mamta Kajla 7 years, 4 months ago

CBSE > Class 12 > Chemistry

2 answers

Anurag Pandey 7 years, 4 months ago

Because of proper formation/arrangement of molecules and ions inside them

Sweety Sweety 7 years, 4 months ago

Because they behave like true solid

ANSWER

Under what condition molality equal to molarity

Posted by Ayush Singh 7 years, 4 months ago

CBSE > Class 12 > Chemistry

1 answers

Abhishek Baitha 7 years, 4 months ago

Highly diluted soln

ANSWER

what is mean by seeded? page no. 150 of ncert class 12 chemistry

Posted by Gaurav Gupta 7 years, 4 months ago

CBSE > Class 12 > Chemistry

1 answers

Abhishek Baitha 7 years, 4 months ago

To arrange

ANSWER

What is exothirmic reaction

Posted by Aman Saini 7 years, 4 months ago

CBSE > Class 12 > Chemistry

1 answers

Sagar Makol 7 years, 4 months ago

It is reaction which produces heat as by-product

ANSWER

what do you mean by occulision ?

Posted by Arvind Yadav 7 years, 4 months ago

CBSE > Class 12 > Chemistry

2 answers

Azmat Ali 7 years, 4 months ago

Adsorption of gases on metal ( solid ) surfaces .

Rashi Rawat 7 years, 4 months ago

Association of gaseous particle on metal surface

ANSWER

Write reaction whenAcitified pottassium dichromate is treated with iron solution ?

Posted by Rocky Uppal 7 years, 4 months ago

CBSE > Class 12 > Chemistry

0 answers

ANSWER

Four use of emulsions

Posted by Harsh Singh 7 years, 4 months ago

CBSE > Class 12 > Chemistry

0 answers

ANSWER

What is the name of ch

Posted by Satish Tigga 7 years, 4 months ago

CBSE > Class 12 > Chemistry

0 answers

ANSWER

KF crystallises in the Nacl type structure. If the radius of K^+ ion is 132pm and that F^- ion is 135pm what is the shortest K-F distance. What is the edge length of the unit cell. Plz solve it and give me full solution of this question

Posted by Riya Chaurasiya 7 years, 4 months ago

CBSE > Class 12 > Chemistry

1 answers

Riya Chaurasiya 7 years, 4 months ago

Plz koi to solve kro

ANSWER

1.25g of a solid dibasic is completely neutralised by 25ml of 0.25molar barium hydroxide solution. MOlecular mass of an acid is

Posted by Sangeetha K N 7 years, 4 months ago

CBSE > Class 12 > Chemistry

0 answers

ANSWER

What is the effect of temperature on adsorption rate after attaining equilibrium?

Posted by Student S 7 years, 4 months ago

CBSE > Class 12 > Chemistry

2 answers

Aryan Rajput 7 years, 4 months ago

Physorption decrease with increased temperature but chemisorption increase with increased temperature

Anjana Sherawat 7 years, 4 months ago

Adsorption decreases with increase in temperature

ANSWER

why NO is paramagnetic in vapour state while in solid or liquid state it acts as diamagnetic

Posted by Kiara Khurrana 7 years, 4 months ago

CBSE > Class 12 > Chemistry

3 answers

G K 7 years, 4 months ago

The number of electrons in Nitrogen are 7 and in oxygen are 8. Hence the number of electrons that would be present in the molecular orbitals in NO are 7 + 8 = 15. As the number of electrons are odd, all the electrons in NO molecule cannot be paired. Hence, a single electron would be present in a π*2p orbital. Therefore NO is an odd electron species and the gas is hence paramagnetic due to the presence of unpaired electron. In the liquid and the solid state, the gas dimerises. The unpaired electron becomes paired and NO is therefore diamagnetic.

Kiara Khurrana 7 years, 4 months ago

if u all dont know plz reply

Kiara Khurrana 7 years, 4 months ago

plz reply l need the answer

ANSWER

Why Sn ia not used for protecting Fe?

Posted by Goldy Gola 7 years, 4 months ago

CBSE > Class 12 > Chemistry

0 answers

ANSWER

Why Zn has dipole moment zero?

Posted by Smriti Patel 5 years, 8 months ago

CBSE > Class 12 > Chemistry

0 answers

ANSWER

Why catalyst doesn't affect the enthalpy of reaction?

Posted by Vaibhav Srivastav 7 years, 4 months ago

CBSE > Class 12 > Chemistry

1 answers

Aryan Rajput 7 years, 4 months ago

Because catalyst just increase the rate of reaction it doesn't effect the enthalpy of reaction

ANSWER

What is the difference between the geometry and shape of a molecule

Posted by Abd Fan 7 years, 4 months ago

CBSE > Class 12 > Chemistry

1 answers

Rishabh Sahu 7 years, 4 months ago

If you are talking about chemical bonding chapter from class 11 then geometry describes the arrangement considering all electron pairs are bond pairs and hence how the molecule would look if all electrons were participants in bonding to other atoms whereas shape describe the actual shape caused by the atoms and effect of lone pairs (their presence )is not taken in account.

ANSWER

Who gonna take full marks in Chemistry?????????

Posted by Sakshi Singh 7 years, 4 months ago

CBSE > Class 12 > Chemistry

1 answers

Neha Hanu 7 years, 4 months ago

I wanna

ANSWER

Why soap gives white ppt in hard water

Posted by Anjali Sharma 7 years, 4 months ago

CBSE > Class 12 > Chemistry

3 answers

Anjali Sharma 7 years, 4 months ago

Thank u my dear friend and remember

Sweety Sweety 7 years, 4 months ago

In hard water ca and mg present which react with soap and and replace na and k and form a white ppt called scum which ia immisiable ..

Sakshi Singh 7 years, 4 months ago

Because there are Ca(2+) and Mg(2+) ions which react with soap solution and remove Na from soap. Say thanks my dear friend.

ANSWER

how would you prepare nylon 6 from cyclohexane

Posted by Honey Passi 7 years, 4 months ago

CBSE > Class 12 > Chemistry

0 answers

ANSWER

Althrough chlorine is an electron withdrawing group yet it is o,p director

Posted by Neha Hire 7 years, 4 months ago

CBSE > Class 12 > Chemistry

2 answers

Sakshi Singh 7 years, 4 months ago

I think it's Cl not cl ........????⊙_⊙๏_๏????(Anjana)

Anjana Sherawat 7 years, 4 months ago

Because cl has lone pair of electrons so it shows +R effect

ANSWER

What is valence factor H3PO2?explain.

Posted by Ankit Gupta 7 years, 4 months ago

CBSE > Class 12 > Chemistry

0 answers

ANSWER

How many moles of magnesium phosphate will contain 0.25 mole of oxygen atoms?

Posted by Atiya Imran 7 years, 4 months ago

CBSE > Class 12 > Chemistry

0 answers

ANSWER

Why PCl3 fumes in moist air giving fumes of HCl??

Posted by Toshika Varshney 7 years, 4 months ago

CBSE > Class 12 > Chemistry

1 answers

Muktadhir Alehi Barbhuiya 7 years, 4 months ago

Inpresence of moisture PCl3 undergoes hydrolyses giving fumes of HCl PCl3+3H2O gives H3PO3+ 3HCl

ANSWER

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