Q51.The NaNO3 weighed out to make 50 mL of an aqueous solution containing 70. 0 mg Na+ per mL is_ g . (Rounded off to the nearest integer) [Given : Atomic weight in gmol−1 −Na : 23; N : 14; O : 16 ]
What This Question Tests
This question assesses knowledge of specific qualitative tests used to identify different classes of biomolecules, namely Seliwanoff for ketoses and Xanthoproteic for proteins.
Concepts Tested
📚 NCERT Sections This Tests
1.4 — Concentrated Nitric Acid Used In Laboratory Work Is 68% Nitric Acid By Mass In
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1.4 Concentrated nitric acid used in laboratory work is 68% nitric acid by mass in aqueous solution. What should be the molarity of such a sample of the acid if the density of the solution is 1.504 g mL–1? 27 Solutions Reprint 2025-26
1.29 — Nalorphene (C19H21No3), Similar To Morphine, Is Used To Combat Withdrawal
Chemistry Class 11 · Chapter 1
1.29 Nalorphene (C19H21NO3), similar to morphine, is used to combat withdrawal symptoms in narcotic users. Dose of nalorphene generally given is 1.5 mg. Calculate the mass of 1.5 ´ 10–3 m aqueous solution required for the above dose.
1.28 — Calculate The Mass Percentage Of Aspirin (C9H8O4) In Acetonitrile (Ch3Cn) When
Chemistry Class 11 · Chapter 1
1.28 Calculate the mass percentage of aspirin (C9H8O4) in acetonitrile (CH3CN) when 6.5 g of C9H8O4 is dissolved in 450 g of CH3CN.
📋 Question Details
- Chapter
- Biomolecules
- Topic
- Qualitative tests for biomolecules
- Year
- 2021
- Shift
- 26 Feb Shift 2
- Q Number
- Q51
- Type
- MCQ
- NCERT Ref
- Class 12 Chemistry Ch 14: Biomolecules
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