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Q1. Which is the oxidizing agent used in the test for phosphorous?

(a) Hydrogen peroxide
(b) Potassium nitrate
(c) Sodium peroxide
(d) Nitric acid

Q2. A X color precipitate, which is Y in ammonium hydroxide indicates presence of chlorine. Identify X and Y.

(a) X = yellowish, Y = soluble
(b) X = yellow, Y = insoluble
(c) X = white, Y = insoluble
(d) X = white, Y = soluble

Q3. In case of both nitrogen and sulphur existence, Prussian blue is still the color of the end product.

(a) True
(b) False
(c) Both acidolysis and aldehyde
(d) None of the mentioned

Q4. What is the color of the precipitate obtained in the test for sulphur?

(a) White
(b) Black
(c) Violent
(d) Blue

Q5. In the test for nitrogen, the sodium fusion extract is acidified with which of the following?

(a) Dilute sulphuric acid
(b) Dilute hydrochloric acid
(c) Concentrated hydrochloric acid
(d) Concentrated sulphuric acid

Q6. What is Lassaigne?s test extract called as?

(a) Fusion extract
(b) Sodium fusion extract
(c) Lassaigne extract
(d) Sodium extract

Q7. Potassium can replace sodium in lassaigne?s test.

(a) True
(b) False
(c) Both acidolysis and aldehyde
(d) None of the mentioned

Q8. Identify the element that cannot be detected by Lassaigne?s test.

(a) Nitrogen
(b) Fluorine
(c) Sulfur
(d) Phosphorous

Q9. Which compound gets precipitated in the detection of carbon and hydrogen?

(a) Copper
(b) Carbon dioxide
(c) Calcium carbonate
(d) Copper sulphate

Q10. Carbon and hydrogen are detected by heating the compound with which of the following?

(a) Copper (II)oxide
(b) Iron(II)oxide
(c) Iron(III)oxide
(d) Copper(I)oxide


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The Composition Of Golden Spangles Is

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29.5 Mg Of An Organic Compound Containing Nitrogen Was

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29.5 Mg Of An Organic Compound Containing Nitrogen Was

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Sodium Borate On Reaction With H2SO4 (conc.) And C2H5OH Gives A Compound A Which Burns With Green Flame.The Compound A Is

Modified 246 Year Ago

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Sodium Borate On Reaction With H2SO4 (conc.) And C2H5OH Gives A Compound A Which Burns With Green Flame.The Compound A Is

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