Identification Of Common Gases
Bayani Gaba-gaba
Four stoppered test tubes sit on the bench and not one of them carries a label. Three hold gases you cannot see at all; the fourth has a faint green tint if you catch it against white paper. There is no instrument in the room that will read them out for you. What you do have is a wooden splint, a strip of coloured paper, a bottle of cloudy-looking water and your own sense of smell used very carefully. Within about three minutes, every tube can be named.
That is the quiet promise of qualitative analysis: a handful of cheap, repeatable observations, each one designed so that a single gas gives a result nothing else gives. This lesson works through the four gases OxfordAQA expects you to identify, shows the reaction behind each observation rather than asking you to memorise a list, and deals with the two details that quietly cost marks every year: why the paper has to be damp, and why a limewater test left running too long can tell you the opposite of the truth.
Manufura
- A pop is heard when a lighted splint is placed near hydrogen gas.
- A glowing splint relights in a test tube of oxygen gas.
- Carbon dioxide turns limewater (calcium hydroxide solution) cloudy white.
- Chlorine has a characteristic sharp, choking smell. It also makes damp blue litmus paper turn red, and then bleaches it white.
Taswirar tunani
An zana wannan batu don ka ga yadda ra'ayoyi ke hadewa.
Bude taswirar tunani a cikin manhaja
Takardar Darasi
Cikakken Bayanin Darasi Yana Kan Manhajar Green Bridge
Sami manhajar Green Bridge CBT a wayarka ko kwamfutarka domin cikakken laburaren IGCSE: takardun jarrabawar baya, tsarin kimantawa, taswirar tunani, katunan karatu da darussan sauti.
Nazarin Darasi
Barka da kammala darasi akan Identification Of Common Gases. Yanzu da kuka bincika mahimman raayoyi da raayoyi, lokaci yayi da zaku gwada ilimin ku. Wannan sashe yana ba da ayyuka iri-iri Tambayoyin da aka tsara don ƙarfafa fahimtar ku da kuma taimaka muku auna fahimtar ku game da kayan.
Za ka gamu da haɗe-haɗen nau'ikan tambayoyi, ciki har da tambayoyin zaɓi da yawa, tambayoyin gajeren amsa, da tambayoyin rubutu. Kowace tambaya an ƙirƙira ta da kyau don auna fannoni daban-daban na iliminka da ƙwarewar tunani mai zurfi.
Yi wannan ɓangaren na kimantawa a matsayin wata dama don ƙarfafa fahimtarka kan batun kuma don gano duk wani yanki da kake buƙatar ƙarin karatu. Kada ka yanke ƙauna da duk wani ƙalubale da ka fuskanta; maimakon haka, ka kallesu a matsayin damar haɓaka da ingantawa.
- Which gas relights a glowing splint? A. hydrogen B. oxygen C. carbon dioxide D. chlorine Answer: B
- A colourless gas is bubbled through limewater and the limewater turns cloudy white. The gas is: A. chlorine B. hydrogen C. carbon dioxide D. oxygen Answer: C
- Damp blue litmus paper is held in a tube of gas. The paper turns red and is then bleached white. Which gas is in the tube? A. oxygen B. chlorine C. hydrogen D. carbon dioxide Answer: B
- Why must the litmus paper be damp when testing for chlorine? A. Damp paper is easier to hold in the tube. B. The water cools the gas so that it reacts more slowly. C. The chlorine must dissolve in the water and react with it to form acids. D. The water reacts with the chlorine to produce calcium carbonate. Answer: C
- A lighted splint is held at the mouth of a tube of gas and a squeaky pop is heard. Which gas is in the tube, and what is the product of the reaction? A. oxygen, and the product is carbon dioxide B. hydrogen, and the product is water C. hydrogen, and the product is hydrogen chloride D. chlorine, and the product is water Answer: B
Yi aikin wadannan tambayoyi a cikin manhaja
Yi aikin wadannan tambayoyi a cikin manhaja
Littattafan da ake ba da shawarar karantawa
Yi Aikin Tambayoyin Gwaji
Kana son yin aikin tambayoyin gwaji kan Identification Of Common Gases? Sauke manhajar Green Bridge CBT don samun tambayoyin gwaji da cikakkun jarrabawa akan wannan batu.
Sauke Manhajar Daga Google Playstore
Duk abin da kake buƙata don yin fice a JAMB, WAEC & NECO.
