The acidic solution of a salt produced a deep blue colour with starch iodine solution. The salt may be

The acidic solution of a salt produced a deep blue colour with starch iodine solution. The salt may be
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The acidic solution of a salt produced a deep blue colour with starch iodine solution. The salt may be A. Suphite B. Bromide C. Nitrite D. Chloride
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The acidic solution of a salt produced a deep blue colour with starch iodine solution. The salt may be

Description : The acidic solution of a salt produced a deep blue colour with starch iodine solution. The salt may be

Last Answer : The acidic solution of a salt produced a deep blue colour with starch iodine solution. The salt may be A. chloride B. carbonate C. acetate D. bromide

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

Generally metallic oxides are basic and non-metallic are acidic in nature. Solution of which of the following oxides in water will change the colour of blue litmus to red? a)sulphur dioxide b)Magnesium oxide c)iron oxide d)copper oxide

Description : Generally metallic oxides are basic and non-metallic are acidic in nature. Solution of which of the following oxides in water will change the colour of blue litmus to red? a)sulphur dioxide b)Magnesium oxide c)iron oxide d)copper oxide

Last Answer : a)sulphur dioxide

Iodine gives a red colour with (A) Starch (B) Dextrin (C) Glycogen (D) Inulin

Description : Iodine gives a red colour with (A) Starch (B) Dextrin (C) Glycogen (D) Inulin

Last Answer : C

Iodine solution produces no color with (A) Cellulose (B) Starch (C) Dextrin (D) Glycogen

Description : Iodine solution produces no color with (A) Cellulose (B) Starch (C) Dextrin (D) Glycogen

Last Answer : A

The reagent used to test the presence of starch in leaves is – (1) Fehling's solution (2) Iodine solution (3) Million's reagent (4) Benedict's solution

Description : The reagent used to test the presence of starch in leaves is – (1) Fehling's solution (2) Iodine solution (3) Million's reagent (4) Benedict's solution

Last Answer : (2) Iodine solution 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 color.

Iodine solution is used to test the presence of – (1) Sugar (2) Proteins (3) Starch (4) Fats

Description : Iodine solution is used to test the presence of – (1) Sugar (2) Proteins (3) Starch (4) Fats

Last Answer : (3) Starch Explanation: Iodine solution is used to test the presence of starch.

Iodine solution is used to test the presence of (1) Sugar (2) Proteins (3) Starch (4) Fats

Description : Iodine solution is used to test the presence of (1) Sugar (2) Proteins (3) Starch (4) Fats

Last Answer : Starch

The reagent used to test the presence of starch in leaves is (1) Fehling’s solution (2) Iodine solution (3) Million’s reagent (4) Benedict’s solution

Description : The reagent used to test the presence of starch in leaves is (1) Fehling’s solution (2) Iodine solution (3) Million’s reagent (4) Benedict’s solution

Last Answer : Iodine solution

The Spanish river is known for its deep reddish colour and very acidic water. The river is also of interest to astro-biologists who have compared its constituents to those of Mars’ rocks. Which company takes its name from this river?

Description : The Spanish river is known for its deep reddish colour and very acidic water. The river is also of interest to astro-biologists who have compared its constituents to those of Mars’ rocks. Which company takes its name from this river?

Last Answer : Rio Tinto.

Which of the statements is not true? (1) K2Cr2O7 solution becomes yellow on increasing the pH beyond 7 (2) On passing H2 S through acidified K2Cr2O7 solution, a milky colour is observed (3) Na2Cr2O7 is preferred over K2Cr2O7 in volumetric analysis (4) K2Cr2O7 solution in acidic medium is orange

Description : Which of the statements is not true? (1) K2Cr2O7 solution becomes yellow on increasing the pH beyond 7 (2) On passing H2 S through acidified K2Cr2O7 solution, a milky colour is observed (3) Na2Cr2O7 is preferred over K2Cr2O7 in volumetric analysis (4) K2Cr2O7 solution in acidic medium is orange

Last Answer : Na2Cr2O7 is preferred over K2Cr2O7 in volumetric analysis

An aqueous solution of CuSO4 is acidic in nature because the salt undergoes (a) dialysis (b) hydrolysis (c) electrolysis (d) photolysis

Description : An aqueous solution of CuSO4 is acidic in nature because the salt undergoes (a) dialysis (b) hydrolysis (c) electrolysis (d) photolysis

Last Answer : Ans:(b)

The process of mixing up of salt and water resulting to form an acidic or alkaline solution known as?

Description : The process of mixing up of salt and water resulting to form an acidic or alkaline solution known as?

Last Answer : Hydrolysis

Bee sting contains (1) An acidic liquid (2) a salt solution (3) an alkaline liquid (4) a corrosive liquid

Description : Bee sting contains (1) An acidic liquid (2) a salt solution (3) an alkaline liquid (4) a corrosive liquid

Last Answer : An acidic liquid

The colour of Emerald is - (1) Violet (2) Yellow (3) Deep Green (4) Prussian Blue

Description : The colour of Emerald is - (1) Violet (2) Yellow (3) Deep Green (4) Prussian Blue

Last Answer : (3) Deep Green Explanation: The most desirable emerald colors are bluish green to pure green, with vivid color saturation and tone that's not too dark. The most-prized emeralds are highly transparent. Their color is evenly distributed, with no eyevisible colorzoning.

Which of the following imparts deep blue colour to glass? (1) Cobalt oxide (2) Cupric oxide (3) Ferrous oxide (4) Nickel oxide

Description : Which of the following imparts deep blue colour to glass? (1) Cobalt oxide (2) Cupric oxide (3) Ferrous oxide (4) Nickel oxide

Last Answer : (4) Nickel oxide Explanation: Glass colouring and colour marking may be obtained by addition of colouring ions, by precipitation of nanometer sized colloides (so-called striking glasses such as "ruby gold" or red "selenium ruby"), by coloured inclusions (as in milk glass and smoked glass).

Which of the following imparts deep blue colour to glass ? (1) Cobalt oxide (2) Cupric oxide (3) Ferrous oxide (4) Nickel oxide

Description : Which of the following imparts deep blue colour to glass ? (1) Cobalt oxide (2) Cupric oxide (3) Ferrous oxide (4) Nickel oxide

Last Answer : Nickel oxide

Why did the mixture stop turning the drops of iodine solution blue after 240s?

Description : Why did the mixture stop turning the drops of iodine solution blue after 240s?

Last Answer : Because it didn't react with the iodine, i don't know

Why are stains such as methylene blue and iodine solution used when observeing cells under the microscope?

Description : Why are stains such as methylene blue and iodine solution used when observeing cells under the microscope?

Last Answer : What is the answer ?

Blue Litmus Paper turns _______ on contact with an acidic solution

Description : Blue Litmus Paper turns _______ on contact with an acidic solution

Last Answer : Red

Iodine test is positive for starch, dextrin and (A) Mucoproteins (B) Agar (C) Glycogen (D) Cellulose

Description : Iodine test is positive for starch, dextrin and (A) Mucoproteins (B) Agar (C) Glycogen (D) Cellulose

Last Answer : C

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)`

Why the blue colour of CuSO4 turns colourless during electrolysis of CuSO4 solution by platinum electrode.

Description : Why the blue colour of CuSO4 turns colourless during electrolysis of CuSO4 solution by platinum electrode.

Last Answer : The platinum electrodes are inert. Hence does not dissolve into the solution. The Cu++ ions (blue) present in the solution are discharged on the surface of cathode & OH - are ... a result of this electrolysis, blue coloured CuSO4 solution is slowly converted into colorless H2SO4 solution.

Brine refers to : (1) Salt water (2) Sweet water (3) Pure water (4) Starch water

Description : Brine refers to : (1) Salt water (2) Sweet water (3) Pure water (4) Starch water

Last Answer : (1) Salt water Explanation: Brine is a solution of salt in water. In different contexts, brine may refer to salt solutions ranging from about 3.5% up to about 26%. Other levels of concentration are called in different names.

Brine refers to : (1) Salt water (2) Sweet water (3) Pure water (4) Starch water

Description : Brine refers to : (1) Salt water (2) Sweet water (3) Pure water (4) Starch water

Last Answer : Salt water

In May 1997 an IBM super computer called ______defeated world chess champion Gary Kasparov in a chess match: a) Syntax Blue b) Deep Blue c) Blue Stan d) None of These

Description : In May 1997 an IBM super computer called ______defeated world chess champion Gary Kasparov in a chess match: a) Syntax Blue b) Deep Blue c) Blue Stan d) None of These

Last Answer : b) Deep Blue

The colour of carbohydrate in iodine?

Description : The colour of carbohydrate in iodine?

Last Answer : Dark Blue

I can't get a small package of salt without iodine. Does it exist?

Description : I don't want seafood, which is supposedly iodine-free!

Last Answer : In my opinion, iodine is not always added where it is not. But it could be chemically removed, to be shaken with hydrogen peroxide.

All the following statements about endemic goiter are true except (A) It occurs in areas where soil and water have low iodine content (B) It leads to enlargement of thyroid gland (C) It results ultimately in hyperthyroidism (D) It can be prevented by consumption of iodised salt

Description : All the following statements about endemic goiter are true except (A) It occurs in areas where soil and water have low iodine content (B) It leads to enlargement of thyroid gland (C) It results ultimately in hyperthyroidism (D) It can be prevented by consumption of iodised salt

Last Answer : Answer : C

Which of the following is used to iodise common salt? (1) Potassium iodide (2) Iodine (3) Potassium iodate (4) Sodium iodide

Description : Which of the following is used to iodise common salt? (1) Potassium iodide (2) Iodine (3) Potassium iodate (4) Sodium iodide

Last Answer : (3) Potassium iodate Explanation: Iodized salt (also spelled iodised salt) is table salt mixed with a minute amount of various salts of the element iodine. Table salt with iodide salt slowly loses its ... salt can be iodised by spraying it with a potassium iodate solution. 60 ml of potassium iodate.

Iodine ness salt is usefull for

Description : Iodine ness salt is usefull for

Last Answer : For activity of thyroid gland

When a metal sulphate is heated in dry test tube, the colour changes from blue to white. Then metal sulphate may be :

Description : When a metal sulphate is heated in dry test tube, the colour changes from blue to white. Then metal sulphate may be :

Last Answer : When a metal sulphate is heated in dry test tube, the colour changes from blue to white. Then metal sulphate may ... . `Na_(2)SO_(4)` D. None of these

Which of the following gas turn starch iodide paper blue ?

Description : Which of the following gas turn starch iodide paper blue ?

Last Answer : Which of the following gas turn starch iodide paper blue ? A. `CO_(2)` B. `SO_(2)` C. `NO_(2)` D. `H_(2)S`

(i) `KI+H_(2)O+O_(3)rarrA+B+O_(2)` (A turns moist starch paper blue, B turns red litmus blue) (ii) A(dry)`+O_(3)rarrX+O_(2)` What is true about X in t

Description : (i) `KI+H_(2)O+O_(3)rarrA+B+O_(2)` (A turns moist starch paper blue, B turns red litmus blue) (ii) A(dry)`+O_(3)rarrX+O_(2)` What is true about X in t

Last Answer : (i) `KI+H_(2)O+O_(3)rarrA+B+O_(2)` (A turns moist starch paper blue, B turns red litmus blue) ... )` D. Average oxidation state of iodine in X is `+5`

`{:("List-I","List-II"),("A) O"_(3)+H_(2)O_(2)rarr,"1) Blue"),("B) O"_(3)+"starch KI"rarr,"2) Tailing"),("C) O"_(3)+"Hg"rarr,"3) HIO"_(3)),("D) O"_(3)

Description : `{:("List-I","List-II"),("A) O"_(3)+H_(2)O_(2)rarr,"1) Blue"),("B) O"_(3)+"starch KI"rarr,"2) Tailing"),("C) O"_(3)+"Hg"rarr,"3) HIO"_(3)),("D) O"_(3)

Last Answer : `{:("List-I","List-II"),("A) O"_(3)+H_(2)O_(2)rarr,"1) Blue"),("B) O"_(3)+"starch KI"rarr,"2) Tailing"),("C ... 4,3,2):}` D. `{:(A,B,C,D),(3,2,1,5):}`

Study the following table and choose the correct option: Salt - Parent Acid - Parent Base - Nature of Salt (a) Soidum Chloride - HCI - NaOH - Basic (b) Sodium Carbonate - H2CO3 - NaOH - Neutral (c) Sodium Sulphate - H2SO4 - NaOH - Acidic (d) Sodium Acetate - CH3COOH - NaOH - Basic

Description : Study the following table and choose the correct option: Salt - Parent Acid - Parent Base - Nature of Salt (a) Soidum Chloride - HCI - NaOH - Basic (b) Sodium Carbonate - H2CO3 - NaOH - Neutral (c) Sodium Sulphate - H2SO4 - NaOH - Acidic (d) Sodium Acetate - CH3COOH - NaOH - Basic

Last Answer : Answer: (d) Sodium Acetate - CH3COOH - NaOH - Basic

Metallic oxides which react with both acid and base to produce salt and water are called A) Neutral Oxides B) Basic Oxides C) Amphoteric Oxides D) Acidic Oxides

Description : Metallic oxides which react with both acid and base to produce salt and water are called A) Neutral Oxides B) Basic Oxides C) Amphoteric Oxides D) Acidic Oxides

Last Answer : C) Amphoteric Oxides

Acids react with bases to form which of the following? Do they form: w) salt and acidic anhydride x) water and basic anhydride y) basic anhydride and salt z) salt and water

Description : Acids react with bases to form which of the following? Do they form: w) salt and acidic anhydride x) water and basic anhydride y) basic anhydride and salt z) salt and water

Last Answer : ANSWER: D -- SALT AND WATER

What substance is produced from the starch and what it and used for?

Description : What substance is produced from the starch and what it and used for?

Last Answer : Glucose is produced from the starch and it is used as energy for our bodies to use. it is also used to help ameoba which traps a chlamydomonas and digests it.

Styrene which is a monomer for the production of polystyrene, is commercially produced by the (A) Catalytic dehydrogenation of ethyl benzene (B) Dehydration of ethyl alcohol followed by hydrogenation (C) Reacting ethylene oxide with acetaldehyde (D) Fermentation of starch

Description : Styrene which is a monomer for the production of polystyrene, is commercially produced by the (A) Catalytic dehydrogenation of ethyl benzene (B) Dehydration of ethyl alcohol followed by hydrogenation (C) Reacting ethylene oxide with acetaldehyde (D) Fermentation of starch

Last Answer : (A) Catalytic dehydrogenation of ethyl benzene

Styrene (a monomer for the production of polystyrene) is commercially produced by (A) Catalytic dehydrogenation of ethyl benzene (B) Dehydration of ethyl alcohol followed by hydrogenation (C) Reacting ethylene oxide with acetaldehyde (D) Fermentation of starch

Description : Styrene (a monomer for the production of polystyrene) is commercially produced by (A) Catalytic dehydrogenation of ethyl benzene (B) Dehydration of ethyl alcohol followed by hydrogenation (C) Reacting ethylene oxide with acetaldehyde (D) Fermentation of starch

Last Answer : (A) Catalytic dehydrogenation of ethyl benzene

When thiosulphate ion is oxidised by iodine. which one of the following ion is produced ?

Description : When thiosulphate ion is oxidised by iodine. which one of the following ion is produced ?

Last Answer : When thiosulphate ion is oxidised by iodine. which one of the following ion is produced ? A. (A) `SO_3^(2-)` B ... `S_4O_6^(2-)` D. (D) `S_2O_6^(2-)`

How many moles of iodine are produced from 560 g of magnesium iodide?

Description : How many moles of iodine are produced from 560 g of magnesium iodide?

Last Answer : not sure

Assertion: Black soils are black in colour due to diffusion of iron in crystalline and metamorphic rocks. Reason: They develop deep cracks during hot weather Options: (a) Both A and R are true and R is the correct explanation of A. (b) Both A and R are true and R is not the correct explanation of A.(c) A is true but B is false. (d) A is false but R is true.

Description : Assertion: Black soils are black in colour due to diffusion of iron in crystalline and metamorphic rocks. Reason: They develop deep cracks during hot weather Options: (a) Both A and R are true and R is the correct explanation of ... of A.(c) A is true but B is false. (d) A is false but R is true.

Last Answer : (d) A is false but R is true.

The bluish colour of water in deep sea is due to (a) The presence of algae and other plants found in water (b) Reflection of sky in water (c) Scattering of light (d) Absorbtion of light by sea

Description : The bluish colour of water in deep sea is due to (a) The presence of algae and other plants found in water (b) Reflection of sky in water (c) Scattering of light (d) Absorbtion of light by sea

Last Answer : (c) Scattering of light

Classify the following mixtures as homogeneous and heterogeneous. (i)Tincture of iodine (iv)Sugar solution (ii)Smoke (iii)Brass -Chemistry

Description : Classify the following mixtures as homogeneous and heterogeneous. (i)Tincture of iodine (iv)Sugar solution (ii)Smoke (iii)Brass -Chemistry

Last Answer : In the above classification, tincture of iodine, brass and sugar are homogenous mixture while the smoke is heterogeneous mixture. Tincture of iodine is a liquid solution, brass is an alloy made ... component. Smoke on other hand is composed of moisture and gas thus making the mixture heterogeneous.

iodine is liberated from Kl solution when treated with:

Description : iodine is liberated from Kl solution when treated with:

Last Answer : iodine is liberated from Kl solution when treated with: A. (A) `ZnSO_4` B. (B) `CuSO_4 ` C. (C) `NiSO_4 ` D. (D) `FeSO_4`