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CBSE Class 11 Science Free Doubts and Solutions

CBSE - XI Science - Chemistry

Specific volume of cylindrical virus particle is 6.02×10^-2 cc/gm whose radius and length are 7 angstrom and 10 angstrom respectively.If NA=6.02×10^23,find molecular weight of virus.

Asked by pb_ckt 23rd April 2019, 9:06 PM

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CBSE - XI Science - Chemistry

An element X has the following isotopic composition..200 X:90%,199 X:8%,202 X:2%.The weighed average atomic mass of the naturally occurring element X is closest to(in amu)?

Asked by pb_ckt 22nd April 2019, 11:20 PM
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CBSE - XI Science - Chemistry

When x molecules are removed from 200mg of N2O, 2.89×10^-3 moles of N20 are left.x will be? (pls explain in detail)

Asked by pb_ckt 22nd April 2019, 11:17 PM
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CBSE - XI Science - Chemistry

A sample of ammonium phosphate contains 3.18 moles of hydrogen atoms.The no.of moles of oxygen atoms in the sample is?(Pls explain in detail)

Asked by pb_ckt 22nd April 2019, 11:15 PM
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CBSE - XI Science - Chemistry

Insulin contains 3.4% of sulphur by mass.What is the minimum molecular weight of Insulin?(Pls explain in detail)

Asked by pb_ckt 22nd April 2019, 11:13 PM
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CBSE - XI Science - Physics

angular momentum

Asked by sachinkandel 20th April 2019, 8:18 PM
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CBSE - XI Science - Mathematics - Sets

Is collection of all women in this world a set?  

Asked by sumankumaribharti 19th April 2019, 8:34 PM
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CBSE - XI Science - Biology

Define the following terms w.r.t a prokaryotic bacterial cell. 1.Genomic DNA 2.Lysis 3.Nucleoid 4.Invagination of cell membrane 5.Mucilage 6.Polyribosome

Asked by pb_ckt 16th April 2019, 9:06 PM
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CBSE - XI Science - Physics

dimensons

Asked by asanth 16th April 2019, 6:18 PM
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CBSE - XI Science - Mathematics

Plz solve this question

qsnImg
Asked by bhavya13schs 12th April 2019, 9:25 AM
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