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

It is effect seen in f-block lanthanoid compounds due to which despite having large atomic number and more number of shells there size is comparatively quite small . This happens due to poor shielding effect of d and f subshell. Exteriors electrons are pulled strongly toward nucleus thus huge reduction in size occour.

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Mmmmmmmmmmmmmmmmmmmm Wwwwwwwwwwwwwwwwwwww 7 years, 10 months ago

Pata hai me kya bolunga??..............charas ganja hum ko chahiye........charas ganja...........

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Hii Guys!

Posted by Sai Thaini 7 years, 10 months ago

CBSE > Class 12 > Chemistry

2 answers

Mmmmmmmmmmmmmmmmmmmm Wwwwwwwwwwwwwwwwwwww 7 years, 10 months ago

Hi hi hi.......???

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Ishu Chouhan 7 years, 10 months ago

Hello

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Hui guys!

Posted by Sai Thaini 7 years, 10 months ago

CBSE > Class 12 > Chemistry

0 answers

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Its very difficult to learn the reactions please suggest me some idea

Posted by Ishu Chouhan 7 years, 10 months ago

CBSE > Class 12 > Chemistry

3 answers

R Raja 7 years, 10 months ago

My tip to organic question is students you learn and practise NCERT exercise questions and intext question. Cbse set organic question from here ONLY each year. This works only for organic chapters.

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R Raja 7 years, 10 months ago

Just learn reaction mechanism and catalyst properties like oxidizing or reducing catalyst. Learn name reaction more questions are asked from here only.

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Mmmmmmmmmmmmmmmmmmmm Wwwwwwwwwwwwwwwwwwww 7 years, 10 months ago

Ishaani meri jaan hamari labz mu me le ke dekho ... Sab yaad ho jaega

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Chemistry paper difficult aata h ki easy

Posted by Ishu Chouhan 7 years, 10 months ago

CBSE > Class 12 > Chemistry

2 answers

Ishu Chouhan 7 years, 10 months ago

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Suraj Maity 7 years, 10 months ago

Pichhle kuchh saalon se to easy hi aata hai..but iss baar ka koi chance nhi lena chahiye..preparation puri honi chahiye

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ANSWER

Packing % of bcc

Posted by Tame Sarra 7 years, 10 months ago

CBSE > Class 12 > Chemistry

2 answers

Gaurav Yadav 7 years, 10 months ago

68%

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Mmmmmmmmmmmmmmmmmmmm Wwwwwwwwwwwwwwwwwwww 7 years, 10 months ago

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Plzz tell me chemistry ka kch important question jiski exams me ane ke bahut chance hai please

Posted by Aditya Raj 7 years, 10 months ago

CBSE > Class 12 > Chemistry

1 answers

Radhika Tyagi 7 years, 10 months ago

Acidic character of carboxylic acids and basic character of amines

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Which is the Best preferred book other than ncert for boards ???

Posted by Naina Mishra 7 years, 10 months ago

CBSE > Class 12 > Chemistry

2 answers

Satyendra Tomar 7 years, 10 months ago

S.l arora book

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Sheetal Sombir 7 years, 10 months ago

Arhiant notes

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ANSWER

Will SNAr occur in para bromo nitro benzene?

Posted by Bhautik Agrawal 7 years, 10 months ago

CBSE > Class 12 > Chemistry

1 answers

Radhika Tyagi 7 years, 10 months ago

SNAr kya hota h?

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ANSWER

Give typical slip planes and direction of FCC and BCC metals.

Posted by Fcg Vvg 7 years, 10 months ago

CBSE > Class 12 > Chemistry

1 answers

Mmmmmmmmmmmmmmmmmmmm Wwwwwwwwwwwwwwwwwwww 7 years, 10 months ago

Fcc-fast comming ?........bcc-big cool ?

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Why sulphuric acid is not added during the reaction of alcohols with sodium iodide?

Posted by Naina Vashishth 7 years, 10 months ago

CBSE > Class 12 > Chemistry

2 answers

Sakshi Singh 7 years, 10 months ago

Bcz H2SO4 react with Na I to give HI which further liberate I2

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Mmmmmmmmmmmmmmmmmmmm Wwwwwwwwwwwwwwwwwwww 7 years, 10 months ago

Sulphuric acid khatam ho Gaya hoga is liye

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Is ncert questions is sufficient for board exams chemistry

Posted by Sumit Gupta 7 years, 10 months ago

CBSE > Class 12 > Chemistry

4 answers

Radhika Tyagi 7 years, 10 months ago

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Mmmmmmmmmmmmmmmmmmmm Wwwwwwwwwwwwwwwwwwww 7 years, 10 months ago

Sufficient

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Ashish Kumar 7 years, 10 months ago

You can also do last year papers

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Jin Kazama 7 years, 10 months ago

You can also do xamidea ?

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ANSWER

Please explain intex question

Posted by Shoib Khan Khan 7 years, 10 months ago

CBSE > Class 12 > Chemistry

1 answers

Jin Kazama 7 years, 10 months ago

Intex company to bdi kahrab hai ?

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ANSWER

What will be the products for PCl3 + H2O

Posted by Dhruv Gupta 7 years, 10 months ago

CBSE > Class 12 > Chemistry

4 answers

N V 7 years, 10 months ago

Pcl3 +3H2O-H3PO3 + 3HCl

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Jin Kazama 7 years, 10 months ago

Abe Rupesh Cl kha chori ho gya ???

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Jin Kazama 7 years, 10 months ago

H3Po3 + HCl balance it yourself if necessary ?

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Rupesh Chitkara 7 years, 10 months ago

H3po3 + H2o

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What is dipole moment?

Posted by Justin Tirkey 7 years, 10 months ago

CBSE > Class 12 > Chemistry

1 answers

Alia Khan 7 years, 10 months ago

The product of either charge and distance of separation between them know as dipole moment

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ANSWER

What is a colloid

Posted by Abhishek Sharma 7 years, 10 months ago

CBSE > Class 12 > Chemistry

1 answers

Vijay Bhatt 7 years, 10 months ago

A solution whose particles range from 1nm to 1000nm

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ANSWER

Bond angle in Nh4 is greater than that in Nh3

Posted by Shagufta Jilani 7 years, 10 months ago

CBSE > Class 12 > Chemistry

2 answers

Jin Kazama 7 years, 10 months ago

B.P.-B.P. repulsion > B.P.-L.P. repulsion . fevicol se bilcul ulta hai ?

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Bhautik Agrawal 7 years, 10 months ago

Its all due to lone pair-bond pair repulsion in NH3 molecule which is great than Bond pair -bond pair repulsion in NH4 molecule (no lone pair present in NH4) thus angle is less in NH3

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ANSWER

Calculate Ecell of H in contact with solution whose pH is 10

Posted by Ayushi Jain 7 years, 10 months ago

CBSE > Class 12 > Chemistry