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CBSE Class 12-science Answered

While using concentrated nitric acid, if a drop falls on the hands, the hands become yellow in colour. Why?
Asked by sunil2791 | 15 Jun, 2017, 08:27: PM
answered-by-expert Expert Answer
Because it reacts with the protiens in the skin by oxidizing them.
Answered by Vaibhav Chavan | 16 Jun, 2017, 09:54: AM

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CBSE 12-science - Chemistry
enzymes provide different pathway for substrate to convert into product by lowering the activation energy. but how enzyme is able to do it?
Asked by rohitraman1115 | 24 Sep, 2019, 05:45: PM
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CBSE 12-science - Chemistry
who acts as carrier of vitamin in our body?is it carbohydrate or red blood cells or anything else??
Asked by rohitraman1115 | 19 May, 2019, 12:36: PM
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CBSE 12-science - Chemistry
What type of bonding occurs in β-plated structure of proteins?
Asked by Topperlearning User | 26 May, 2014, 01:17: PM
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CBSE 12-science - Chemistry
What type of bonding is present in Globular proteins?
Asked by Topperlearning User | 22 May, 2014, 04:52: PM
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CBSE 12-science - Chemistry
(a) What changes occur in the nature of egg proteins on boiling?(b) Name the type of bonding which stabilizes α-helix structure in proteins.
Asked by Topperlearning User | 23 May, 2014, 01:36: PM
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CBSE 12-science - Chemistry
An optically active amino acid (A) can exist in three forms depending on the pH of the medium. If the molecular formula of (A) is C3H7NO2. Write:(i) Structure of compound (A) in aqueous medium. What are such ions called?(ii) In which medium will the cationic form of a compound (A) exist?(iii) In alkaline medium, which side will it move?
Asked by Topperlearning User | 26 May, 2014, 01:10: PM
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CBSE 12-science - Chemistry
How many naturally occurring amino acids in proteins exist? How many of these are synthesized by the body?
Asked by Topperlearning User | 22 Jun, 2016, 09:11: AM
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CBSE 12-science - Chemistry
State differences between primary and secondary structure of proteins.
Asked by Topperlearning User | 26 May, 2014, 01:19: PM
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CBSE 12-science - Chemistry
Which α-amino acid can cross link peptide chains?
Asked by Topperlearning User | 22 Jun, 2016, 09:11: AM
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CBSE 12-science - Chemistry
α-amino acids have relatively higher melting points than corresponding halo acids. Explain.
Asked by Topperlearning User | 22 Jun, 2016, 09:09: AM
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