In the estimation of sulphur by Carius method, 0.468gm of organic compound gave 0.668gm $ BaSO_4 $ . Calculate % of S.
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Purification and Characteristics of Organic Compounds MCQs for NEET — Chemistry Questions with Answers
Practice free Purification and Characteristics of Organic Compounds (Chemistry) NEET multiple-choice questions online with instant answers and detailed explanations. No login required.
In each of the following questions, a statement (A) is given followed by Reason (R). Give your answers as A: Vapour density and density both are same R: Molecular weight is twice the density
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In each of the following questions, a statement (A) is given followed by Reason (R). Give your answers as A: Lassaigne’s test is shown by diazonium salts. R: Diazonium salts are volatile.
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Explanation
Diazonium salts do not show Lassaigne’s test because Lassaigne’s test is used to detect nitrogen, sulfur, and halogens in organic compounds. Diazonium salts, on the other hand, decompose to release nitrogen gas, and therefore the test is not applicable. Additionally, diazonium salts are generally not volatile; they are typically stable only at low temperatures and can decompose explosively when heated. Thus, both the assertion (A) and reason (R) are false.
In each of the following questions, a statement (A) is given followed by Reason (R). Give your answers as A: Sulphur present in organic compound can be estimated quantitavely by Carius method. R: Sulphur is separated easily from other atoms in the molecules and gets precipitated as light yellow solid.
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Which of the following metal is used in the test of elements in organic compounds by Lassigne test ?
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Sodium nitroprusside when added to an alkaline solution of sulphide ions produces a colouration which is:
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Explanation
In Kjeldahl's method, nitrogen present is estimated as:
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Explanation
(b) NH3
In Kjeldahl's method of estimation of nitrogen, K2SO4 acts as:
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Explanation
On adding salt boiling point increased.
A compound which does not give a positive test in Lassaigne’s test for nitrogen is:-
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Explanation
Lassigne’s test is not given by those compounds in whihc carbon is absent. So, Hydrazine can't give this test
The silver sulphate solution is used to separate:
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Explanation
AgBr is insoluble; AgNO3 is soluble.
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