Why cant flame test be use to identify non metals?

1 Answer

Answer :

Non metals cannot emit a colored light.

Related questions

Description : Metals which do not give flame test ?

Last Answer : Metals which do not give flame test ? A. Be B. Li C. Mg D. Ba

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`

Description : Do all metals produce colour in a flame?

Last Answer : Need answer

Description : why alkali metals impart color to the flame?

Last Answer : Ans. Alkali metals have low ionization enththalpies. Their valence electrons get excited by absorbing energy from the flame. When these electrons return to the ground state, the energy is emitted In the form of light.

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. 

Description : Which of the following produce red coloured flame during flame test ?

Last Answer : Which of the following produce red coloured flame during flame test ? A. `Li` B. `Ca^(2-)` C. `Sr^(2-)` D. `Ba^(2-)`

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

Description : The compound formed in the borax bead test of `Cu^(2+)` ion in oxidising flame is :

Last Answer : The compound formed in the borax bead test of `Cu^(2+)` ion in oxidising flame is : A. Cu B. `CuBO_(2)` C. `Cu(BO_(2))_(2)` D. None of these

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

Last Answer : Metal (M) shows crimson red colour in flame test and its halide is deliquescent then metal (M) could be : A. Li B. Mg C. Ca D. Ba

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

Last Answer : Why is concentrated HCl used to dissovle the given metal salt in the flame test ? A. strong acids produce ... the flame in presence of `Cl^(-)` ions.

Description : What is the flame test color of francium?

Last Answer : The flame test color of francium is not known.

Description : __________ test is done to find out the softening point of bitumen. (A) Impact (B) Ball and ring (C) Flame (D) Viscosity

Last Answer : (B) Ball and ring

Description : In a flame test the presence of calcium would cause what color flame?

Last Answer : ANSWER: RED (accept yellow-rez)

Description : In a flame test both lithium and strontium produce various shades of this color. What is this color?

Last Answer : ANSWER: RED

Description : In a flame test, the presence of copper in a solution is evident by what color flame? Is the flame w) red x) orange y) indigo z) blue-green

Last Answer : ANSWER: Z -- BLUE-GREEN

Description : What happens to a nichrome wire in a non-luminous flame?

Last Answer : The color of wire is unchanged.

Description : Are the flame retardents used in kid's bedding set non-toxic?

Last Answer : Yes, absolutley.

Description : The hottest part of the gas flame is known as – (1) blue zone (2) non-luminous zone (3) luminous zone (4) dark zone

Last Answer : (3) luminous zone

Description : A sooty flame can be made non-luminous by (A) Admitting more gas (B) Shutting gas supply (C) Admitting more air (D) Shutting air supply

Last Answer : (C) Admitting more air

Description : Combustion of pulverised coal as compared to that of lump coal (A) Develops a non-luminous flame (B) Develops a low temperature flame (C) Can be done with less excess air (D) Provides a lower rate of heat release

Last Answer : (C) Can be done with less excess ai

Description : During combustion of a gaseous fuel, the presence of a non-luminous flame is an indication of the (A) Incomplete combustion (B) Complete combustion (C) High oxygen in flue gas (D) None of these

Last Answer : (B) Complete combustion

Description : Lignite is (A) A high rank coal (B) A coking coal (C) Can be used for gasification and steam generation (D) A black banded coal which burns with a non-smoky yellowish flame

Last Answer : (C) Can be used for gasification and steam generation

Description : Cannel coal (A) Is non-coking (B) Has a high volatile matter content and burns with a luminous smoky flame (C) Is a non-banded coal which can be ignited easily with a match stick or candle flame, hence is so named (D) All (A), (B) and (C

Last Answer : (D) All (A), (B) and (C

Description : The hottest part of the flame lies in its _________zone. (A) Non-luminous (B) Luminous (C) Yellow (D) Unburnt gases

Last Answer : (A) Non-luminous

Description : On placing an inverted tumbler over a burning candle, the flame extinguishes after some – time . This is because of non –availability of a) oxygen b)water vapour c)carbon dioxide d)wax

Last Answer : a) oxygen

Description : The middle zone of a candle flame is known as the ________ zone. a) luminous b)non-luminous c)wax d)burning

Last Answer : a) luminous

Description : The hottest part of the gas flame is known as (1) blue zone (2) non-luminous zone (3) luminous zone (4) dark zone

Last Answer : luminous zone

Description : Why can't scientists just rearrange atoms to make gold or other precious metals?

Last Answer : Because they are atoms. You need high energy to squeeze them together and they give off large energy when they do squeeze together.

Description : Adhesives (A) Can’t be used in the form of pressure sensitive tapes (B) Can’t join two dissimilar metals (C) Cure instantaneously after application on a surface (D) None of these

Last Answer : (D) None of these

Description : Why does metal make a sound when hammered and non-metals not?

Last Answer : Everything makes a sound when hit. Rigid things tend to make more sound because the vibration propagates over the whole shape quickly because the rigid thing is held tightly, so instead of just giving ... -lasting sound at one frequency. Metal is a rigid thing because of its structure. See above.

Description : Which atomic structures go with metals/non metals?

Last Answer : I'm assuming you haven't gotten an answer to your question for 2 months because you're question isn't specific and doesn't really make sense (no offense ) What are you looking you for? I'd be glad ... , I'm a chem eng major and helping ppl with their chemistry helps me remember and get better at it!

Description : Examples of non-metals are ………. , …….. and ……. -Science

Last Answer : Sulphur, chlorine and oxygen.

Description : Non-metals cannot be drawn into wires. Why ? [DAV2008] -Science

Last Answer : Non-metals are not ductile, therefore they cannot be drawn into wires.

Description : How many metals and non-metals are there in periodic table ?

Last Answer : In the periodic table, those metals and 2 non-metals are : - Alkali metals , clay metals , transition elements , interstitial elements , lanthanides , actinides and weak metals are all called metals together. Halogen and inert gases are also non-metals.

Description : Are non-metals and gases the same ?

Last Answer : Answer:, Non-metals and gas are not one. Non-metals can also be solid or liquid. Such as: - Sulfur (solid in some cases) , Bromine (liquid). However, although all gases are non-metallic, not all non-metals are gases.

Description : What are metals and non-metals ?

Last Answer : Metals: Atoms of elements which produce cations by releasing electrons are called metals. Non-metals: All the elements that receive electrons and are anionized or share electrons during the formation of bonds are called non-metals .

Last Answer : All non-metallic corrosive

Description : Hot conc. `H_(2)SO_(4)` acts as moderately strong oxidising agent. It oxidises both metals and non-metals. Which of the following elements is oxidised

Last Answer : Hot conc. `H_(2)SO_(4)` acts as moderately strong oxidising agent. It oxidises both metals and non-metals. Which ... products ? A. Cu B. S C. C D. Zn

Description : Non-metals combine with oxygen to form usually

Last Answer : Non-metals combine with oxygen to form usually A. Basic oxides B. neutral oxides C. acidic oxides D. Amphoteric oxides

Description : Compare chemical properties of metals and non-metals.

Last Answer : Compare chemical properties of metals and non-metals.

Description : Can non metals be solids?

Last Answer : Need answer

Description : What are some of the non magnetic metals?

Last Answer : Some non-magnetic metals: aluminium, copper, lead, tin, titanium, zinc, brass, bronze, gold, and silver

Description : What compounds only contain non metals?

Last Answer : What is the answer ?

Description : Do all non metals have a dull surface?

Last Answer : Gases for example haven't a surface.

Description : What group of non metals are the most reactive?

Last Answer : The most reactive nonmetal is fluorine. Fluorine is a halogen, which is Group 17 on the Periodic Table, and the halogens are the most reactive...

Description : What are the chemical properties of metals & non-metals?

Last Answer : metals electropositive, basicity, hard, ductile, malleable, sonorous nonmetals electronegative, acidic, brittle, and not all the other three properties.

Description : What are the chemical properties of metals & non-metals?

Last Answer : metals electropositive, basicity, hard, ductile, malleable, sonorous nonmetals electronegative, acidic, brittle, and not all the other three properties.

Description : What happens when metals react with non metals?

Last Answer : they form a salt

Description : India is particularly poor in reserves of (a) coal (b) iron ore (c) non-ferrous metals (d) limestone

Last Answer : Ans: (c)