Practice free NEET NEET multiple-choice questions online with instant answers and detailed explanations. No login required.
An organic compound on analysis gave C = 48gm, H = 8gm and N = 56gm. Volume of 1.0 gm of the compound was found to be 200 ml at STP. What is the molecular formula of the compound ?
200ml of compound = 1 gm $ \therefore $ 22400 ml of compound = 112 gm
Which of the following method can be empolyed to separate a mixture of Chloroform (b.p334k) and aniline (b.p 457k) ?
To separate a mixture of chloroform (b.p 334K) and aniline (b.p 457K), distillation can be used. The substantial difference in boiling points allows for effective separation by selectively boiling and condensing each component.
Insulin contains 3.4% Sulphur. The minimum molecular weight of insulin is
To find the minimum molecular weight of insulin, we use the percentage of sulfur present. Given that insulin contains 3.4% sulfur, we assume the presence of one sulfur atom in the smallest unit of insulin. The atomic weight of sulfur is approximately 32 g/mol. Let's denote the minimum molecular weight of insulin as M. The percentage of sulfur can be expressed as (32/M) * 100% = 3.4%. Solving for M, we have M = (32 * 100) / 3.4 = 941.18. Since 941.18 is closest to option 940, the minimum molecular weight of insulin is approximately 940.
Which element is estimated by Carius method ?
The Carius method is used for the quantitative determination of halogens (chlorine, bromine, and iodine), sulfur, and phosphorus in organic compounds. The organic compound is heated with fuming nitric acid in a sealed tube, resulting in the formation of silver halide (if halogens are present) which can be weighted. Therefore, the element estimated by the Carius method is Halogen.
What is relation between the following pairs
Distillation under reduced pressure is used when ...
Distillation under reduced pressure is used when a liquid has a very high boiling point and decomposes at or below its boiling point. The reduced pressure lowers the boiling point of the liquid, allowing it to be distilled without decomposition.
In Carius method, 0.099 g compound gave 0.287 gm AgCl. What is the % of Cl ?
$ \% Cl = { 35.5 \over 143.5 } \times { 0.287 \over 0.099} \times 100 $
In which compound, sulphur of organic compound is converted when organic compound is reacted with con. HNO3 for estimation of Sulphur ?
When an organic compound containing sulfur is reacted with concentrated nitric acid (HNO3) for the estimation of sulfur, the sulfur is converted into sulfuric acid (H2SO4). This is due to the strong oxidizing nature of concentrated nitric acid, which oxidizes sulfur to its highest oxidation state in sulfuric acid.
Which of the following techniques is used to separate glycerol from spent-lye in soap industry ?
Glycerol can be separated from spent-lye in the soap industry using distillation under reduced pressure. This method is preferred because glycerol has a high boiling point, and reducing the pressure lowers the boiling point, allowing the separation to occur without decomposition.
Which method is used to separate aniline water mixture ?
Steam distillation is used to separate aniline from water. Aniline and water form a heterogeneous mixture that can be separated by steam distillation because aniline is steam volatile and immiscible with water.
Ready to ace NEET?
Free access · No credit card required
Yes. You can attempt every NEET question on this page for free without logging in, and check the correct answer with a detailed explanation instantly.
No account is required to attempt questions and view answers. A free account adds bookmarks, personal notes, and progress tracking.
The bank mixes NEET previous year questions (PYQs) with practice questions, each tagged with its exam appearances where applicable.