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What is the difference between pseudocode and trace table?
pseudocode is a sentence-like representation of a piece of code while a trace table is a technique used to test a algorithms.
What is difference between toefel and gre?
The TOEFL test certifies people to teach English as a foreign language. The GRE is often required before admission to graduate school.
What is the difference between hypothesis and lemma?
A Hypothesis is something that you set out to test to prove or disprove. A Lemma is something that has already been proved that you use to help prove something else.
What is the difference between draw and tie?
In a test match, a draw and tie are completely different.Draw:Undecided result.Tie: Second team makes the same score AND all wickets lost.Only two ties have occurred in the 2,000 Tests played since 1877. The first was in 1960 and the second in 1986.
A correlation of -0.90 between two sets of test scores indicates that?
There is quite a high degree of linear agreement between the two variables with one showing an increase when the other shows a decrease.
What is barfoed test?
The Barfoeds test will allow us to make a distinction between reducing monosaccharides and reducing disaccharides. If the Red tetrazolium test is done first and is positive for a reducing sugar, then the Barfoeds test will tell us if it is mono or di.
What is the principles of tollen's test?
The principle of Tollens' test is to distinguish between aldehydes and ketones. It involves the reduction of silver ions to silver metal in the presence of aldehydes, which results in the formation of a silver mirror on the inner surface of the test tube. Ketones do not give a positive Tollens' test because they do not undergo this reaction with silver ions.
Is fructose gives positive test with tollens reagent?
no negative
Does the tollens test deal with alkenes?
No, the Tollen's Silver Mirror Test only confirms the presence of aldehydes.
How is a positive tollens test recognised?
A silverish ppt. Called "silver mirror"
what is the outcome of tollens reagent reacting with methanal, ethanol and propanone?
The outcome of the Tollens reagent reacting with methanal (formaldehyde), ethanol (ethyl alcohol), and propanone (acetone) is the formation of metallic silver (Ag) in the case of methanal, while ethanol and propanone do not show a significant reaction with Tollens reagent. Tollens reagent is used as a chemical test to distinguish between aldehydes and ketones, where aldehydes react to produce a silver mirror, while ketones do not react.
What is the difference between diagnostic test and proficiency test?
what is the difference between proffiency and diagnostic test
What is the difference between proficiency test and diagnostic test?
what is the difference between proffiency and diagnostic test
Why fructose gives positive tollen reagent test?
Only aldehydes give a positive Tollens test. However, under the strongly basic conditions of the test, alpha-hydroxy ketones can isomerize to aldehydes, so they will also give a positive Tollens test. Fructose is an alpha-hydroxy ketone.
Why pyrrole-2-aldehyde does not respond to tollens reagent?
Pyrrole-2-aldehyde does not respond to Tollens reagent because it is not a reducing sugar. Tollens reagent (silver nitrate) is used to test for the presence of aldehyde groups, which are commonly found in reducing sugars. Reducing sugars contain aldehyde groups and are capable of donating electrons to Tollens reagent, forming a silver mirror on the test tube wall. Pyrrole-2-aldehyde does not contain aldehyde groups, and therefore is not a reducing sugar. As a result, it does not react with Tollens reagent.
What is the Formula for oxidation product formed from formaldehyde in the Tollens test?
It is Formic acid or its anion.
Is vanillin positive in tollens test?
No.While vanillin is an aldehyde, which should react with Tollens' reagent to precipitate silver metal, vanillin does not "pass" Tollens' test. Tollens' reagent is very basic (sodium or potassium hydroxide). Vanillin has a phenolic hydrogen (OH bonded to a phenyl ring) which is slightly acidic. Vanillin will react first with the excess hydroxide ions in solution to form a phenoxide salt, which will not participate in the silver-precipitating reaction.
