A solution of sodium thiosulphate on addition of few drops of ferric chloride gives violet colour due to the formation of

A solution of sodium thiosulphate on addition of few drops of ferric chloride gives violet colour due to the formation of
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A solution of sodium thiosulphate on addition of few drops of ferric chloride gives violet colour due to the formation of ... `Fe_(2)(S_(2)O_(3))_(2)`
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A potato tuber has been cut into two halves. A few drops of iodine solution are placed on the cut surface of one of the halves. What colour change will be noticed? (1) From brown to blue-black (2) From brown to orange-red (3) From blue to pink (4) From pink to blue-green

Description : A potato tuber has been cut into two halves. A few drops of iodine solution are placed on the cut surface of one of the halves. What colour change will be noticed? (1) From brown to blue-black (2) From brown to orange-red (3) From blue to pink (4) From pink to blue-green

Last Answer : (1) From brown to blueblack Explanation: Any form of starch (carbohydrate) turns blue-black when iodine solution is applied to it. This is because starch is composed of polymers of ... already mentioned. The complex of iodine stuck inside the amylose coil produces a characteristic blueblack colour.

potato tuber has been cut into two halves. A few drops of iodine solution are placed on the cut surface of one of the halves. What colour change will be noticed? (1) From brown to blue-black (2) From brown to orange-red (3) From blue to pink (4) From pink to blue-green

Description : potato tuber has been cut into two halves. A few drops of iodine solution are placed on the cut surface of one of the halves. What colour change will be noticed? (1) From brown to blue-black (2) From brown to orange-red (3) From blue to pink (4) From pink to blue-green

Last Answer : (1) From brown to blueblack Explanation: The Iodine test is used to test for the presence of starch. Iodine solution — iodine dissolved in an aqueous solution of potassium iodide — reacts with the starch producing a purple black colour.

A potato tuber has been cut into two halves. A few drops of iodine solution are placed on the cut surface of one of the halves. What colour change will be noticed? (1) From brown to blue–black (2) From brown to orange–red (3) From blue to pink (4) From pink to blue–green

Description : A potato tuber has been cut into two halves. A few drops of iodine solution are placed on the cut surface of one of the halves. What colour change will be noticed? (1) From brown to blue–black (2) From brown to orange–red (3) From blue to pink (4) From pink to blue–green

Last Answer : From brown to blue–black

A potato tuber has been cut into two halves. A few drops of iodine solution are placed on the cut surface of one of the halves. What colour change will be noticed? (1) From brown to blue-black (2) From brown to orange-red (3) From blue to pink (4) From pink to blue-green

Description : A potato tuber has been cut into two halves. A few drops of iodine solution are placed on the cut surface of one of the halves. What colour change will be noticed? (1) From brown to blue-black (2) From brown to orange-red (3) From blue to pink (4) From pink to blue-green

Last Answer : From brown to blue-black

Chemical name of Grignard reagent is (A) Sodium thiosulphate (B) Ethyl magnesium chloride (C) Sodium sulphite (D) Sodium bicarbonate

Description : Chemical name of Grignard reagent is (A) Sodium thiosulphate (B) Ethyl magnesium chloride (C) Sodium sulphite (D) Sodium bicarbonate

Last Answer : (B) Ethyl magnesium chloride

Function of sodium thiosulphate (hypo) in development of photographic film/plate is to (A) Brighten the faint images (B) Remove metallic silver (C) Convert silver chloride to silver (D) Remove unexposed silver halide

Description : Function of sodium thiosulphate (hypo) in development of photographic film/plate is to (A) Brighten the faint images (B) Remove metallic silver (C) Convert silver chloride to silver (D) Remove unexposed silver halide

Last Answer : (D) Remove unexposed silver halide

How can arsenic be removed from aqueous waste streams? Often times, ferric chloride is added to such a stream. The ferric chloride aids in the formation

Description : How can arsenic be removed from aqueous waste streams? Often times, ferric chloride is added to such a stream. The ferric chloride aids in the formation

Last Answer : Often times, ferric chloride is added to such a stream. The ferric chloride aids in the formation of floc to agglomerate fine arsenic particles that can then be removed by mechanical means.

Which is the most widely used coagulant for the treatment of turbid water? (A) Alum (aluminium sulphate) (B) Lime (C) Ferric chloride (D) Sodium aluminate

Description : Which is the most widely used coagulant for the treatment of turbid water? (A) Alum (aluminium sulphate) (B) Lime (C) Ferric chloride (D) Sodium aluminate

Last Answer : (A) Alum (aluminium sulphate)

To a 25 mL `H_(2)O_(2)` solution excess acidified solution of Kl was added. The iodine liberated 20 ml of 0.3 N sodium thiosulphate solution. Use thes

Description : To a 25 mL `H_(2)O_(2)` solution excess acidified solution of Kl was added. The iodine liberated 20 ml of 0.3 N sodium thiosulphate solution. Use thes

Last Answer : To a 25 mL `H_(2)O_(2)` solution excess acidified solution of Kl was added. The iodine liberated 20 ml of ... strength of `H_(2)O_(2)` is 1.344 L

The formula of product formed, when sodium thiosulphate solution is added to silver bromide is

Description : The formula of product formed, when sodium thiosulphate solution is added to silver bromide is

Last Answer : The formula of product formed, when sodium thiosulphate solution is added to silver bromide is A. `Na_(3)[Ag(S_(2)O_ ... `Ag_(3)[Na(S_(2)O_(3))_(2)]`

Doctor's solution used for sweetening of petroleum products is (A) Sodium plumbite (B) Sodium sulphite (C) Sodium thiosulphate (D) Lead sulphate

Description : Doctor's solution used for sweetening of petroleum products is (A) Sodium plumbite (B) Sodium sulphite (C) Sodium thiosulphate (D) Lead sulphate

Last Answer : (A) Sodium plumbite

A student took Sodium Sulphate solution in a test tube and added Barium Chloride solution to it. He observed that an insoluble substance has formed. The colour and molecular formula of the insoluble substance is (a) Grey, Ba2SO4 (b) Yellow, Ba(SO4)2, (c) White, BaSO4 (d) Pink, BaSO4,

Description : A student took Sodium Sulphate solution in a test tube and added Barium Chloride solution to it. He observed that an insoluble substance has formed. The colour and molecular formula of the insoluble substance is (a) Grey, Ba2SO4 (b) Yellow, Ba(SO4)2, (c) White, BaSO4 (d) Pink, BaSO4,

Last Answer : Answer: (c) White, BaSO4

Which of the following statements regarding red soils of India is/are correct? 1. The colour of the soil is-red due to ferric oxide content. 2. Red soils are rich in lime, humous and potash. 3. They are porous and have friable structure. Select the correct answer using the code given below: [(OS2011] (a) 1 only (b) 1 and 3 only (c) 2 and 3 only (d) 1, 2 and 3

Description : Which of the following statements regarding red soils of India is/are correct? 1. The colour of the soil is-red due to ferric oxide content. 2. Red soils are rich in lime, humous and potash. 3. They are porous and have friable ... OS2011] (a) 1 only (b) 1 and 3 only (c) 2 and 3 only (d) 1, 2 and 3

Last Answer : Ans: (b)

A colorless salt gives violet colour to Bunsen flame and also turns moisture litmus paper blue. It is :

Description : A colorless salt gives violet colour to Bunsen flame and also turns moisture litmus paper blue. It is :

Last Answer : A colorless salt gives violet colour to Bunsen flame and also turns moisture litmus paper blue. It is : A. `Na_(2) ... C. `NaNO_(3)` D. `K_(2)CO_(3)`

Which metal gives violet colour in oxidising flame when heated with borax ?

Description : Which metal gives violet colour in oxidising flame when heated with borax ?

Last Answer : Which metal gives violet colour in oxidising flame when heated with borax ? A. Fe B. Pb C. Co D. Mn

Alkali metal salt "X" gives a pale violet colour in flame test "X" is :

Description : Alkali metal salt "X" gives a pale violet colour in flame test "X" is :

Last Answer : Alkali metal salt "X" gives a pale violet colour in flame test "X" is : A. NaCl B. LiCl C. KCl D. None of these

The green colour seen in firework displays is due to the chloride salt of– (1) Sodium (2) Strontium (3) Barium (4) Calcium

Description : The green colour seen in firework displays is due to the chloride salt of– (1) Sodium (2) Strontium (3) Barium (4) Calcium

Last Answer : (3) Barium Explanation: The red, orange, yellow, green, blue and purple colors exploding in the night sky during a pyrotechnic festival are created by the use of metal salts. Barium chloride ... orange), sodium nitrate (yellow), barium chloride (green fireworks) and copper chloride (blue fireworks).

The green colour seen in firework displays is due to the chloride salt of : (1) Sodium (2) Strontium (3) Barium (4) Calcium

Description : The green colour seen in firework displays is due to the chloride salt of : (1) Sodium (2) Strontium (3) Barium (4) Calcium

Last Answer : Barium

How many drops of the ciprofloxacin hydro chloride ophthalmic solution 0.3 as vase should I do in the ear?

Description : How many drops of the ciprofloxacin hydro chloride ophthalmic solution 0.3 as vase should I do in the ear?

Last Answer : Need answer

What is the signal of ferric chloride ?

Last Answer : : The signal of ferric chloride is FeCl3

Ferric chloride is applied to stop bleeding cut because

Description : Ferric chloride is applied to stop bleeding cut because

Last Answer : Ferric chloride is applied to stop bleeding cut because A. `Fe^(3+)` coagulates blood which ... (-)` coagulates blood which is negatively charged sol

Bleeding is stopped by the application of ferric chloride. This is because

Description : Bleeding is stopped by the application of ferric chloride. This is because

Last Answer : Bleeding is stopped by the application of ferric chloride. This is because A. the blood starts ... D. the ferric chloride seals the blood vessel.

Q No: 291 The coagulant widely used for sewage treatment, is A. Alum B. Ferric chloride C. Ferric sulphate D. Chlorinated copperas

Description : Q No: 291 The coagulant widely used for sewage treatment, is A. Alum B. Ferric chloride C. Ferric sulphate D. Chlorinated copperas

Last Answer : ANS: B

The coagulant which is generally not used for treating the sewage, is A. Alum B. Ferric chloride C. Ferric sulphate D. Chlorinated copperas

Description : The coagulant which is generally not used for treating the sewage, is A. Alum B. Ferric chloride C. Ferric sulphate D. Chlorinated copperas

Last Answer : ANS: A

Why is ferric chloride preferred over potassium chloride in case of a cut leading to bleeding?

Description : Why is ferric chloride preferred over potassium chloride in case of a cut leading to bleeding?

Last Answer : Ans.: Blood is negatively charge colloidal particles. It is coagulated by +ve ions. As Fe ++ ions has greater number of charges than K+ ions. Therefore on the basis of Hardy-Schulze rule, Coagulation with Fe+++ is faster and hence it is preferred. 

Which of these statement is true for sodium thiosulphate ?

Description : Which of these statement is true for sodium thiosulphate ?

Last Answer : Which of these statement is true for sodium thiosulphate ? A. it acts as an antichlor B. it ... hypo to dissolve excess of AgBr as a soluble complex

Which of these statement is true for sodium thiosulphate ?

Description : Which of these statement is true for sodium thiosulphate ?

Last Answer : Which of these statement is true for sodium thiosulphate ? A. it acts as an antichlor B. it ... hypo to dissolve excess of AgBr as a soluble complex

In the test for iodine, `I_(2)` is treated with sodium thiosulphate `(Na_(2)S_(2)O_(3))` : `Na_(2)S_(2)O_(3)+I_(2) to NaI +..`

Description : In the test for iodine, `I_(2)` is treated with sodium thiosulphate `(Na_(2)S_(2)O_(3))` : `Na_(2)S_(2)O_(3)+I_(2) to NaI +..`

Last Answer : In the test for iodine, `I_(2)` is treated with sodium thiosulphate `(Na_(2)S_(2)O_(3))` : `Na_(2)S_(2)O_(3 ... (4)` C. `Na_(2)S` D. `Na_(3)ISO_(4)`

Statement -1 : Sodium thiosulphate is not prepared by boiling `Na_(2)SO_(3)` with S in acidic medium. Statement -2 : `Na_(2)S_(2)O_(3)+H^(+) to 2Na++H

Description : Statement -1 : Sodium thiosulphate is not prepared by boiling `Na_(2)SO_(3)` with S in acidic medium. Statement -2 : `Na_(2)S_(2)O_(3)+H^(+) to 2Na++H

Last Answer : Statement -1 : Sodium thiosulphate is not prepared by boiling `Na_(2)SO_(3)` with S in acidic medium. Statement ... +H^(+) to 2Na++H_(2)SO_(3)+Sdarr`

Which of the following statements are true about sodium thiosulphate?

Description : Which of the following statements are true about sodium thiosulphate?

Last Answer : Which of the following statements are true about sodium thiosulphate? A. It is used in ... It contains ionic, covalent and coordinate covalent bonds

Sodium thiosulphate is prepared by

Description : Sodium thiosulphate is prepared by

Last Answer : Sodium thiosulphate is prepared by A. boiling `Na_(2)SO_(3)` solution with elemental sulphur in alkaline ... 5)` with air D. heating sulphur with NaOH

Hypo, used in photography, is chemically (a) silver bromide (b) sodium thiosulphate (c) sodium phosphate (d) silver nitrate

Description : Hypo, used in photography, is chemically (a) silver bromide (b) sodium thiosulphate (c) sodium phosphate (d) silver nitrate

Last Answer : Ans:(b)

A dark purple compound used as an antiseptic and disinfectant is (a) Potassium nitrate (b) Sodium thiosulphate (c) Potassium permanganate (d) Calcium phosphate

Description : A dark purple compound used as an antiseptic and disinfectant is (a) Potassium nitrate (b) Sodium thiosulphate (c) Potassium permanganate (d) Calcium phosphate

Last Answer : Ans:(c)

Which one of the following is used as a food preservative? (1) Sodium benzoate (2) Sodium thiosulphate (3) Sodium hydroxide (4) Sodium bicarbonate

Description : Which one of the following is used as a food preservative? (1) Sodium benzoate (2) Sodium thiosulphate (3) Sodium hydroxide (4) Sodium bicarbonate

Last Answer : (1) Sodium. benzoate Explanation: Sodium benzoate has the chemical formula. NaC6H5CO2, it is a widely used food preservative, with E number E211. It is the sodium salt of benzoic acid and exists in this form when dissolved in water. It can be produced by reacting sodium hydroxide with benzoic acid.

The chemical name of "Hypo" commonly used in photography is – (1) Sodium thiosulphate (2) Silver nitrate (3) Sodium nitrate (4) Silver iodide

Description : The chemical name of "Hypo" commonly used in photography is – (1) Sodium thiosulphate (2) Silver nitrate (3) Sodium nitrate (4) Silver iodide

Last Answer : (1) Sodium thiosulphate Explanation: An emulsion of sodium thiosulfate is called hypo by photographers. It is used to stop development of exposed film. Thiosulfate converts undeveloped silver bromide ... into water-soluble silver thiosulfate complexes that can be removed when the film is washed.

The chemical used as a fixer in photography is - (1) sodium thiosulphate (2) sodium sulphate (3) borax (4) ammonium sulphate

Description : The chemical used as a fixer in photography is - (1) sodium thiosulphate (2) sodium sulphate (3) borax (4) ammonium sulphate

Last Answer : (1) sodium thiosulphate Explanation: Fixation is commonly achieved by treating the film or paper with a solution of thiosulfate salt. Popular salts are sodium thiosulfate — commonly called hypo — and ammonium thiosulfate — commonly used in modern rapid fixer formulae.

The chemical used as a fixer in photography is-----? A. sodium sulphate B. borax C. sodium thiosulphate (Answer) D. ammonium sulphate

Description : The chemical used as a fixer in photography is-----? A. sodium sulphate B. borax C. sodium thiosulphate (Answer) D. ammonium sulphate

Last Answer : C. sodium thiosulphate (Answer)

. Chemical name of soda ash is (A) Sodium bicarbonate (B) Sodium thiosulphate (C) Potassium carbonate (D) None of these

Description : . Chemical name of soda ash is (A) Sodium bicarbonate (B) Sodium thiosulphate (C) Potassium carbonate (D) None of these

Last Answer : (D) None of these

__________ Nature of hypo (sodium thiosulphate) makes it useful in photography. (A) Oxidising (B) Reducing (C) Complex forming (D) Photochemical

Description : __________ Nature of hypo (sodium thiosulphate) makes it useful in photography. (A) Oxidising (B) Reducing (C) Complex forming (D) Photochemical

Last Answer : (C) Complex forming

The most commonly used chemical for de-chlorination of water, is (A) Sodium thiosulphate (B) Sodium bisulphate (C) Sodium sulphite (D) Sulphur-dioxide

Description : The most commonly used chemical for de-chlorination of water, is  (A) Sodium thiosulphate  (B) Sodium bisulphate  (C) Sodium sulphite  (D) Sulphur-dioxide 

Last Answer : (C) Sodium sulphite 

With respect to calibration of uv-vis spectrophotometer, which of the following material is used to evaluate the ‘control of absorbance’ A. Sodium thiosulphate B. Potassium dichromate C. Holmium oxide D. Potassium permanganate

Description : With respect to calibration of uv-vis spectrophotometer, which of the following material is used to evaluate the ‘control of absorbance’ A. Sodium thiosulphate B. Potassium dichromate C. Holmium oxide D. Potassium permanganate

Last Answer : B. Potassium dichromate

Which of the following drug can result in result in cyanide poisoning? A. Amyl nitrite B. Hydroxycobalamine C. Sodium nitroprusside D. Sodium thiosulphate

Description : Which of the following drug can result in result in cyanide poisoning? A. Amyl nitrite B. Hydroxycobalamine C. Sodium nitroprusside D. Sodium thiosulphate

Last Answer : C. Sodium nitroprusside 

Which one of the following is used as a food preservative ? (1) Sodium benzoate (2) Sodium thiosulphate (3) Sodium hydroxide (4) Sodium bicarbonate

Description : Which one of the following is used as a food preservative ? (1) Sodium benzoate (2) Sodium thiosulphate (3) Sodium hydroxide (4) Sodium bicarbonate

Last Answer : Sodium benzoate

The chemical name of ‘‘Hypo’’ commonly used in photography is (1) Sodium thiosulphate (2) Silver nitrate (3) Sodium nitrate (4) Silver iodide

Description : The chemical name of ‘‘Hypo’’ commonly used in photography is (1) Sodium thiosulphate (2) Silver nitrate (3) Sodium nitrate (4) Silver iodide

Last Answer : Sodium thiosulphate

Ethers can be freed from peroxides by treatment with (a) Ferrous salt (b) Sodium carbonate (c) Ferric salt (d) Sodium bicarbonate

Description : Ethers can be freed from peroxides by treatment with (a) Ferrous salt (b) Sodium carbonate (c) Ferric salt (d) Sodium bicarbonate

Last Answer : Ferric salt

Cement paints usually (A) Contain hydrated lime (B) Contain 5% to 10% colour pigments (C) Contain 5% sodium chloride (D) All the above

Description : Cement paints usually (A) Contain hydrated lime (B) Contain 5% to 10% colour pigments (C) Contain 5% sodium chloride (D) All the above

Last Answer : Answer: Option D

Benzoyl chloride on basic-hydrolysis (NaOH/H2O) gives : (a) Benzoic acid (b) Methyl benzoate (c) Sodium benzoate (d) Ethyl benzoate

Description : Benzoyl chloride on basic-hydrolysis (NaOH/H2O) gives : (a) Benzoic acid (b) Methyl benzoate (c) Sodium benzoate (d) Ethyl benzoate

Last Answer : Sodium benzoate

Which of the following anions will have minimum flocculation value for the ferric oxide solution?

Description : Which of the following anions will have minimum flocculation value for the ferric oxide solution?

Last Answer : Which of the following anions will have minimum flocculation value for the ferric oxide solution? A. `Cl^(-)` B. `Br^( ... 2-)` D. `[Fe(CN)_(6)]^(3-)`

Which of the following ions is most effective in the coagulation of ferric hydroxide solution ?

Description : Which of the following ions is most effective in the coagulation of ferric hydroxide solution ?

Last Answer : Which of the following ions is most effective in the coagulation of ferric hydroxide solution ? A. `Cl^(-)` B. `Br^( ... `NO_(2)^(-)` D. `SO_(4)^(2-)`

Pick out the wrong statement. (A) Polymeric fibres are never produced by addition polymerisation (B) Property of tackiness is exhibited by uncured rubber (C) Sharp melting point is not observed in thermoplastic polymers (D) Polythene generally has an excellent resistance to ultra violet rays

Description : Pick out the wrong statement. (A) Polymeric fibres are never produced by addition polymerisation (B) Property of tackiness is exhibited by uncured rubber (C) Sharp melting point is not observed in thermoplastic polymers (D) Polythene generally has an excellent resistance to ultra violet rays

Last Answer : (A) Polymeric fibres are never produced by addition polymerisation