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IE Irodov solutions

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July 08, 2021

https://www.entrancei.com/ie-irodov-solutions

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CHEMICAL PROPERTIES OF CARBON FAMILY

June 23, 2019

CHEMICAL PROPERTIES OF CARBON FAMILY (1) Reactivity towards acids : C, Si, Ge unaffected by dilute acid but Sn dissolves in dilute HNO 3 forming Sn(NO 3 ) 2 . Pb dissolves slowly in dilute HCl forming PbCl 2 and quite readily in dilute HNO 3 forming Pb(NO 3 ) 2 and oxides of nitrogen. Si is oxidised and undergoes fluorination by hot concentrated HF/HNO 3 . Sn dissolves in several concentrated acids. Pb does not dissolves in concentrated HCl because a surface coating of PbCl 2 is formed. (2) Reactivity towards alkalies : Carbon is unaffected by alkalies. Si reacts slowly with cold aqueous solution of NaOH and readily with hot NaOH solution giving solution of silicates [SiO 4 ] 4– . Sn and Pb are amphoteric it dissolve...

Class 11 chemistry notes

June 07, 2019

Class 11 chemistry notes When students enter in class 11 from class 10 suddenly the entire syllabus increase and the entire subject of class 11 subdivided into three part physical chemistry , organic chemistry and inorganic chemistry whereas in class 10 there is only one subject that is science which consist of all three parts of chemistry , physics and biology so it is difficult for the aspirants to handle the entire syllabus in one year . it require proper planning and strategies. Chemistry Notes for class 11 play an important role in his/her journey, learning with good books are effective only when you have a good Chemistry class 11 notes. So, in this article we are going to discuss how to prepare a good Class 11 chemistry notes 11 And how it can help you in the final revision . How to prepare Class 11 chemistry notes ? While preparing Class 11 chemistry notes one must be clear why you are preparing Chemistry class 11 n...

Vedic Maths

July 07, 2020

Vedic maths is used to do faster calculations of maths. It use several short tricks and tips. Academic team of Entrancei uploaded detail theory and practice problems with solved examples for all students who wants to build solid foundation in Maths through vedic maths . Do check out Read Vedic Maths Tips and Trick with questions and solved examples https://www.entrancei.com/vedic-maths

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