CBSE Class 11-science Questions and Answers
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CBSE XI Science - Chemistry
What is Adsorption
Asked by toshan.dandi5 | 24th Feb, 2021, 09:24: PM
CBSE XI Science - Chemistry
When lead sulphide, PbS and lead oxide, PbO, are heated together the products are lead metal and sulphur dioxide, SO2.
PbS(s) + 2PbO(s)
3Pb (l) + SO2 (g).
If 14.0 g of lead oxide reacts according to the above equation, how many (a) moles of lead (b) grams of lead, (c) atoms of lead and (d) grams of sulphur dioxide are formed?
(Atomic mass : Pb = 207.0, S = 32.1 ; O =16.0)
Asked by seeni2005 | 24th Feb, 2021, 12:34: PM
CBSE XI Science - Chemistry
1) Calculate the number of Cl2 molecules and Cl atoms in 0.25 mol of Cl2 gas. 2) Molar mass of O is 16 g mol-1. What is the mass of one atom and one molecule of Oxygen?
Asked by seeni2005 | 19th Feb, 2021, 12:52: PM
CBSE XI Science - Chemistry
Hello sir Please clarify these two sums 1) Calculate the number of Cl2 molecules and Cl atoms in 0.25 mol of Cl2 gas. 2) Molar mass of O is 16 g mol-1. What is the mass of one atom and one molecule of Oxygen?
Asked by seeni2005 | 17th Feb, 2021, 11:19: AM
CBSE XI Science - Chemistry
Write electronic configuration of following elements in form of orbital notation and orbital diagram C
Asked by salvadormiranda2509 | 13th Feb, 2021, 12:53: PM
CBSE XI Science - Biology
mention two steps of glycolysis in which ATP is utilised
Asked by mohimpathak8638 | 12th Feb, 2021, 07:41: PM
CBSE XI Science - Chemistry
what is a bond angle
Asked by mittalneetu345 | 12th Feb, 2021, 10:23: AM
CBSE XI Science - Biology
Explain about ascaris lumbriocides?
Asked by khanayan1015 | 10th Feb, 2021, 12:08: PM
CBSE XI Science - Chemistry
Hello sir, please clarify this question Does the law of multiple proportions hod true for Isotopes also? If not, why? Please explain briefly.
Asked by seeni2005 | 8th Feb, 2021, 10:52: AM
CBSE XI Science - Chemistry
Which type of alkane produced by decarbooxylation
Asked by archu312004 | 7th Feb, 2021, 10:21: PM
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