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Sec 3 Chem > QA > Flashcards

QA Flashcards

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1
Q

How to test for carbonate

A

add dilute acid, colourless odourless gas is produced that forms a white ppt in limewater

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2
Q

How to test for chloride

A

acidify with dilute nitric acid, then add aqueous silver nitrate, white ppt should be observed

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3
Q

How to test for iodide

A

acidify with dilute nitric acid, then add aqueous silver nitrate, yellow ppt should be observed

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4
Q

How to test for nitrate

A

add aqueous sodium hydroxide, then aluminium foil; warm carefully. Pungent colourless gas is produced that turns moist red litmus blue

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5
Q

how to test for sulfate

A

acidify with dilute nitric acid, then add
aqueous barium nitrate. White ppt should be observed

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6
Q

How to test for Aluminium

A

When sodium hydroxide is added, white ppt., soluble in excess giving a colourless solution. When aqueous ammonia is added, white ppt., insoluble in excess

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7
Q

how to test for ammonium

A

When sodium hydroxide is added, ammnonia is produced on warming

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8
Q

How to test for calcium

A

When sodium hydroxide is added, White ppt, insoluble in excess. No ppt is formed when aqueous ammonia is added

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9
Q

how to test for copper(ii)

A

When sodium hydroxide is added, light blue ppt., insoluble in excess is observed. When aqueous ammonia is added light blue ppt., soluble in excess giving a dark blue solution

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10
Q

how to test for Iron(ii)

A

When sodium hydroxide is added, green ppt., insoluble in excess is observed. When aqueous ammonia is added, green ppt., insoluble in excess is observed

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11
Q

how to test for Iron(iii)

A

When sodium hydroxide is added, red-brown ppt., insoluble in excess is observed. When aqueos ammonia is added red-brown ppt., insoluble in excess is observed

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12
Q

how to test for Zinc

A

When sodium hydroxide is added,white ppt., soluble in excess giving a colourless solution is observed. When aqueous ammonia is added
white ppt., soluble in excess giving a colourless solution

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13
Q

How to test for ammonia gas

A

Gas should turn damp red litmus paper blue

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14
Q

How to test for carbon dioxide

A

gives white ppt when bubbled with limewater

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15
Q

How to test for chlorine

A

Turns blue litmus red and then bleaches it

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16
Q

How to test for hydrogen

A

Ligthed splint extinguishes with a “pop” sound

17
Q

How to test for oxygen

A

relights a glowing splint

18
Q

how to test for sulfur dioxide

A

Turns aqueous acidified potassium manganate from purple to colourless

Sec 3 Chem (3 decks)

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