ICSE Class 12 Science Chemistry Free Doubts and Solutions
ICSE - XII Science - Chemistry
Benzene and toulene boil at same temperature
ICSE - XII Science - Chemistry
A copper concentrate (CuFeS2 + FeS2 + gangue) of composition (wt%) Cu = 6%, S = 35% is roasted with (20+RN*)% excess air. Copper in the roasted product is as Cu2S and all the iron is converted to Fe2O3. Assuming that the gangue does not contain any Cu, Fe and S, Calculate for 1 ton of concentrate i) amount of minerals and gangue ii) volume of air supplied for roasting at STP. iii) Volume and composition of the evolved gas (flue) after roasting [atomic weight of Cu=64, Fe= 56, S=32, O=16, N=14]
ICSE - XII Science - Chemistry
For reaction A(g) + B(g) AB(g) we start with 2 moles of A and B each. At equilibrium 0.8 moles of AB is formed. Then how much of A changes to AB :- (1) 20% (2) 40% (3) 60% (4) 4%
Browse free questions and answers Chapters
- 1 The Solid State
- 2 Solutions
- 3 Electrochemistry
- 4 Chemical Kinetics
- 5 Surface Chemistry
- 6 Isolation of Elements
- 7 The p-Block Elements
- 8 The d-Block and f-Block Elements
- 9 Coordination Compounds
- 10 Haloalkanes and Haloarenes
- 11 Alcohols, Phenols and Ethers
- 12 Aldehydes, Ketones and Carboxylic Acids
- 13 Amines
- 14 Biomolecules
- 15 Polymers
- 16 Chemistry in Everyday Life