Important Questions Of Chemistry For Class 11

Section A 

* Define bond length 

* Name the radioactive alkali metal

* Name of two materials used as stationary phase in chromatography

* calculate the number of moles and molecules of acetic acid in 22 g of it.

* which alkene used in the preparation of polythene बॅग्स

* What is the hybridization of Al in AlCl3

Section B

* Differentiate between sigma and pi bond

* In two moles of acetaldehyde (CH3CHO) , Calculate the following.

a) No. of moles of carbon

b) No. of moles of hydrogen

c) No. of moles of oxygen

d) No. of molecules of acetaldehyde

 

* Explain alkaline earth metal have low values of electronegativity which decreases download the group.

 

*Markownikoff's rule and Anti Markownikoff's rule

* chemical equation of Magnesium heated in air.

* why the elements belonging to the same group  have similar chemical properties. 

Section C

* write the balanced chemical reaction to get Benzene from (a) sodium benzoate (b) phenol

* What happens when dihydrogen reacts with halogens? 

* Explain the reactions of group 1 and group 2 elements with oxygen 

* Display Electron distribution  around the oxygen atom in water molecule and state shape of the molecule , also write H-O-H bond angle.

* Balance the following redox reaction by oxidation number method.

* reactions of Benzene.

a) chlorination 

b) nitration

c) sulphonation

d) friedel craft reaction

name of electrophiles

generation of electrophiles 

* draw the all No bond Resonance structures of isopropyl carbocation

* Explain ammonia is a good complexing agent

* Explain Bredigs arc method 

Section D

* Explain anomalous behaviour of Copper and Chromium

* State and Explain Rutherfords atomic Theory.