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Since its half life is 600sec .which is equals to 10 mins. Therefore in 10mins it will be 100% then 10-20 it will decrease to its half which is 50% and once again from 20-30 it will decrease to the half of remaining which is 25%

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Harshvardhan Tomar 7 years, 4 months ago

25%

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How can I study chemistry for board exam

Posted by Amit Mishra 7 years, 4 months ago

CBSE > Class 12 > Chemistry

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Name a bidentate ligand

Posted by Harsimran K 7 years, 4 months ago

CBSE > Class 12 > Chemistry

1 answers

Parneet Bassi 7 years, 4 months ago

Those ligands which has tendency to donate electrons from two sides Ex. Oxalato ion, ethane1,2diamine

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What is activation energy?

Posted by Nilaksh Tiwari 7 years, 4 months ago

CBSE > Class 12 > Chemistry

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Anup Bishnoi 7 years, 4 months ago

The minimum amount of energy given to reactant to convert into product isnknown as activation energy.

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How would you differentiate SN1 and SN2 mechanism of substitution reaction give one example of each

Posted by Himamshu Jain 7 years, 4 months ago

CBSE > Class 12 > Chemistry

2 answers

We Ayush 7 years, 4 months ago

Sn1 reaction take in two step .first is formation of carbocation amd rearrangement of carbocation and attactment of nucleophile.takes place in polar protic solvent .follow first order kinetics .rate is independent of conc of nucleophile .good leaving group and weak nucelophile whereas sn2 take place in one step.in transition state carbon is bonded to five atoms unstable and cant be isolated.follow second order kinetics and good nucleophile

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Nidhi Malik 7 years, 4 months ago

Sn1 is one step rxn and sn2 is two step rxn

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Bond angle of NH3 is higher than PH3 why

Posted by Ashish Choudhary 7 years, 4 months ago

CBSE > Class 12 > Chemistry

1 answers

Raheem Hasan 7 years, 4 months ago

Because the differnce of electronegavity is more in NH3 bond than PH3 bond.

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The molar conductivity of A1.5M solution of an electrolyte is found to be 138.95cm/mol. Calculate the conductivity of this solution

Posted by Vinita Kumari 7 years, 4 months ago

CBSE > Class 12 > Chemistry

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what type of solution are formed on dissolving different concentration of soap in water ?

Posted by Vansh Singh 7 years, 4 months ago

CBSE > Class 12 > Chemistry

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What are the properties of an isomers to become optically active

Posted by Nishanth Kenkare 7 years, 4 months ago

CBSE > Class 12 > Chemistry

1 answers

Raj Singh 7 years, 4 months ago

they must show (d) and (l) form i.e they must be enantiomer......to became optically active

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Write the chemical rxn of aniline with benzoyl chloride and write the name of the product obtained

Posted by Ankur And Akash Talukder 7 years, 4 months ago

CBSE > Class 12 > Chemistry

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In a reaction 2A gives product , the concentration of A decreases from 0.5 mol per litre to 0.4 mol per litre in 10 minutes .calculate the rate during this interval

Posted by Adan Imam 7 years, 4 months ago

CBSE > Class 12 > Chemistry

1 answers

Prerna Kumari 7 years, 4 months ago

2A ---> P Rate = -(1/2)×∆[A]/∆t = -1/2×(0.4 -0.5)/(10-0) = -0.5×(-0.1)/10 = 0.05/10 = 0.005mol/lit/min

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How density is related to volume

Posted by Priyanka Pachhas 7 years, 4 months ago

CBSE > Class 12 > Chemistry

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

Inversly

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How to convert double to triple bond

Posted by Tanuu Saggar 7 years, 4 months ago

CBSE > Class 12 > Chemistry

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I am best topic for chemistry project for class 12th

Posted by Rabia Siddiqui 7 years, 4 months ago

CBSE > Class 12 > Chemistry

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Calculate the mass of urea required in making 2.5 kg of 25 molal aq. Solution

Posted by Ajay Singh 7 years, 4 months ago

CBSE > Class 12 > Chemistry

1 answers

Prerna Kumari 7 years, 4 months ago

Since, molality = mole of urea / mass of solve Therefore, 25 = mole of urea / 2.5 Mole of urea = 25×2.5 =62.5 Mass of urea / molecular mass of urea = 62.5 Mass of urea / 60 =62.5 Mass of urea = 62.5 × 60 = 3750 gm

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sir sir NCERT questions chaide a group 16 de

Posted by Kawaljit Kaur 7 years, 4 months ago

CBSE > Class 12 > Chemistry