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

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

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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 ?

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Which metal salt gives lilac colour to the flame?

Description : Which metal salt gives lilac colour to the flame?

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Give reason for the colour imparted to the flame by alkali metals

Description : Give reason for the colour imparted to the flame by alkali metals 

Last Answer : The alkali metals and their salts impart characteristic colour to an oxidizing flame. This is because the heat from the flame excites the outermost orbital electron to a higher energy level. When the ... electron comes back to the ground state, there is emission of radiation in the visible region. 

Metal (M) shows crimson red colour in flame test and its halide is deliquescent then metal (M) could be :

Description : Metal (M) shows crimson red colour in flame test and its halide is deliquescent then metal (M) could be :

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Why is concentrated HCl used to dissovle the given metal salt in the flame test ?

Description : Why is concentrated HCl used to dissovle the given metal salt in the flame test ?

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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

Description : 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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Colour imparted to the Bunsen flame by strontium salt is - (1) bluish green (2) apple-green (3) brick red (4) crimson red

Description : Colour imparted to the Bunsen flame by strontium salt is - (1) bluish green (2) apple-green (3) brick red (4) crimson red

Last Answer : (4) crimson red Explanation: A flame test is performed by introducing a sample into the blue flame of a bunsen burner and noting any change in the colour of the flame. The tests can be used ... metallic elements in salts. With strontium salt, the colour of Bunsen flame ranges from crimson to red.

Colour imparted to the Bunsen flame by strontium salt is (1) bluish green (2) apple-green (3) brick red (4) crimson red

Description : Colour imparted to the Bunsen flame by strontium salt is (1) bluish green (2) apple-green (3) brick red (4) crimson red

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Give reason for the appearance of colour in alkali metal halides.

Description : Give reason for the appearance of colour in alkali metal halides. 

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Last Answer : (A) Increases the reducing potential of the gas

why alkali metals impart color to the flame?

Description : why alkali metals impart color to the flame?

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A gas is pale blue in colour on liquifaction, the colour arises from electronic transitions. This transition is forbidden in gaseous state. The gas do

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A gas is pale blue in colour on liquifaction, the colour arises from electronic transitions. This transition is forbidden in gaseous state. The gas do

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Description : The colour of cyanomethmoglobin is (A) Pale yellow (B) Pink (C) Brown (D) Bright red

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Description : Pale colour, medium height, epicanthic eye are the characteristics of

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Description : Which colour of light shows maximum deviation when passed through a prism? (1) Red (2) Green (3) Violet (4) Yellow

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A man with colour blindness will see red as (1) Yellow (2) Blue (3) Green (4) Violet

Description : A man with colour blindness will see red as (1) Yellow (2) Blue (3) Green (4) Violet

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Which of the following colour of light deviates least through the prism? (1) yellow (2) green (3) violet (4) red

Description : Which of the following colour of light deviates least through the prism? (1) yellow (2) green (3) violet (4) red

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Which colour of light shows maximum deviation when passed through a prism ? (1) Red (2) Green (3) Violet (4) Yellow

Description : Which colour of light shows maximum deviation when passed through a prism ? (1) Red (2) Green (3) Violet (4) Yellow

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The colour bands on a carbon composition resistor occur in the sequence: yellow, violet, yellow and silver.

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What colour does the universal indicator turn when the alkali is neutralized?

Description : What colour does the universal indicator turn when the alkali is neutralized?

Last Answer : blue

A metal salt solution gives a yellow precipitate with silver nitrate. The precipitate dissolves in dilute nitric acid as well as in ammonium hydroxide

Description : A metal salt solution gives a yellow precipitate with silver nitrate. The precipitate dissolves in dilute nitric acid as well as in ammonium hydroxide

Last Answer : A metal salt solution gives a yellow precipitate with silver nitrate. The precipitate dissolves in dilute nitric acid as ... (3-)` D. `SO_(4)^(2-)`

Within a given period of the periodic table, the element with the lowest ionization energy is: w) transition metal x) alkali metal y) halogen z) noble gas

Description : Within a given period of the periodic table, the element with the lowest ionization energy is: w) transition metal x) alkali metal y) halogen z) noble gas

Last Answer : ANSWER: X -- ALKALI METAL

What does alkali react with to produce salt and water ?

Last Answer : Alkali reacts with acid to produce salt and water

Shaving soaps are (A) Soft potassium soaps (potassium salt of fatty acid) with free Stearic acid to give lather a lasting property (B) Metallic soaps compounded with frothing agents (C) High free alkali soaps having excess of cane sugar and alcohol (D) None of these

Description : Shaving soaps are (A) Soft potassium soaps (potassium salt of fatty acid) with free Stearic acid to give lather a lasting property (B) Metallic soaps compounded with frothing agents (C) High free alkali soaps having excess of cane sugar and alcohol (D) None of these

Last Answer : (A) Soft potassium soaps (potassium salt of fatty acid) with free Stearic acid to give lather a lasting property

Which element is used in medicine; pho- tography and making dyes; gives off a violet vapour when heated?

Description : Which element is used in medicine; pho- tography and making dyes; gives off a violet vapour when heated?

Last Answer : Iodine

How many of following metals impart a characteristic colour to the Bunsen flame ? `(i) Na " " (ii) Li " " (iii) K " " (iv) Ba` `(v) Sr " " (vi) Mg " "

Description : How many of following metals impart a characteristic colour to the Bunsen flame ? `(i) Na " " (ii) Li " " (iii) K " " (iv) Ba` `(v) Sr " " (vi) Mg " "

Last Answer : How many of following metals impart a characteristic colour to the Bunsen flame ? `(i) Na " " (ii) Li " " (iii) K ... ix) `Be " " (x )Ca " " (x i)Cu`

Do all metals produce colour in a flame?

Description : Do all metals produce colour in a flame?

Last Answer : Need answer

When sodium burns; what is the colour of the flame?

Description : When sodium burns; what is the colour of the flame?

Last Answer : Golden yellow

What is the colour imparted to the flame by Calcium,Strantium and Barium?

Description : What is the colour imparted to the flame by Calcium,Strantium and Barium?

Last Answer : Ans Calcium, strontium and barium impart characteristic brick red, crimson and apple green colours respectively to the flame. In flame the electrons are excited to higher energy levels and when they drop back to the ground state, energy is emitted in the form of visible light.

Why Be and Mg do not impart colour to the flame ?

Description : Why Be and Mg do not impart colour to the flame ?

Last Answer : Ans : The electrons in beryllium and magnesium are too strongly bound to get excited by flame. Hence, these elements do not impart any colour to the flame.

Give reason: Glass objects when held to flame acquires golden yellow colour.

Description : Give reason: Glass objects when held to flame acquires golden yellow colour.

Last Answer : The sodium content of sodium silicate present in glass makes the flame to acquire golden yellow colour to the flame.

What is the colour imparted to the flame by Ca,Sr and Ba?

Description : What is the colour imparted to the flame by Ca,Sr and Ba?

Last Answer : Calcium, strontium and barium impart characteristic brick red, crimson and apple green colours respectively to the flame. In flame the electrons are excited to higher energy levels and when they drop back to the ground state, energy is emitted in the form of visible light. 

Why Be and Mg do not impart colour to the flame ?

Description : Why Be and Mg do not impart colour to the flame ? 

Last Answer : The electrons in beryllium and magnesium are too strongly bound to get excited by flame. Hence, these elements do not impart any colour to the flame. 

A salt gives white residue in charcoal cavity test but in cobalt nitrate test it gives pink mass. It represents :

Description : A salt gives white residue in charcoal cavity test but in cobalt nitrate test it gives pink mass. It represents :

Last Answer : A salt gives white residue in charcoal cavity test but in cobalt nitrate test it gives pink mass. It represents : A. ` ... `Mg^(+2)` D. `PO_(4)^(-3)`

Sodium borate on reaction with conc. `H_2 SO_4` and `C_2 H_5 OH` gives a compound A which burns with a green edged flame. The compound A is

Description : Sodium borate on reaction with conc. `H_2 SO_4` and `C_2 H_5 OH` gives a compound A which burns with a green edged flame. The compound A is

Last Answer : Sodium borate on reaction with conc. `H_2 SO_4` and `C_2 H_5 OH` gives a compound A which burns with a green edged ... ` D. `(C_(2)H_(5))_(3)BO_(3)`

The leaks in a refrigeration system using Freon are detected by (a) halide torch which on detection produces greenish flame lighting (b) sulphur sticks which on detection gives white smoke (c) using reagents (d) sensing reduction in pressure.

Description : The leaks in a refrigeration system using Freon are detected by (a) halide torch which on detection produces greenish flame lighting (b) sulphur sticks which on detection gives white smoke (c) using reagents (d) sensing reduction in pressure.

Last Answer : Ans: a

What is the most electrically positive and active metal of the alkali metal period ?

Description : What is the most electrically positive and active metal of the alkali metal period ?

Last Answer : Alkali metal is the most electrically positive and active metal of all time .