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Chemistry
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Questions in this quiz (89)
1Colour of Cu metal is [blank_start]reddish-brown[blank_end]
- Areddish-brown
2Colour of copper(II)oxide is [blank_start]black[blank_end]
- Ablack
3Colour of copper(II)carbonate is [blank_start]green[blank_end]
- Agreen
4Colour of Cu2+ ions solutions is [blank_start]blue[blank_end]
- Ablue
5Colour of Fe metal is [blank_start]grey[blank_end]
- Agrey
6Colour of Fe2+ ions solutions is [blank_start]green[blank_end]
- Agreen
7Colour of iron(II)hydroxide is [blank_start]green[blank_end]
- Agreen
8Colour of Fe3+ ions solutions is [blank_start]reddish-brown[blank_end]
- Areddish-brown
9Colour of iron(III)hydroxide is [blank_start]reddish-brown[blank_end]
- Areddish-brown
10Colour of Zn metal is [blank_start]grey[blank_end]
- Agrey
11Colour of zinc oxide is [blank_start]white[blank_end]
- Awhite
12Colour of zinc carbonate is [blank_start]white[blank_end]
- Awhite
13Colour of Zn2+ ions solutions is [blank_start]colourless[blank_end]
- Acolourless
14Colour of Pb metal is [blank_start]grey[blank_end]
- Agrey
15Colour of lead(II)oxide is [blank_start]white[blank_end]
- Awhite
16Colour of lead(II)sulfate is [blank_start]white[blank_end]
- Awhite
17Colour of lead(II)carbonate is [blank_start]white[blank_end]
- Awhite
18Colour of Pb2+ ions solutions is [blank_start]colourless[blank_end]
- Acolourless
19Colour of barium sulfate is [blank_start]white[blank_end]
- Awhite
20Sodium carbonate is [blank_start]white[blank_end] before heating. It turns into [blank_start]sodium oxide[blank_end] and is [blank_start]white[blank_end] after heating
- Awhite
- Bsodium oxide
- Cwhite
21Zinc carbonate is [blank_start]white[blank_end] before heating. It turns into[blank_start] zinc oxide[blank_end] and is [blank_start]yellow[blank_end] when hot and [blank_start]white[blank_end] when cold after heating
- Awhite
- Bzinc oxide
- Cyellow
- Dwhite
22Lead carbonate is [blank_start]white[blank_end] before heating. It turns into [blank_start]lead oxide[blank_end] and is [blank_start]yellow[blank_end] when hot and [blank_start]white[blank_end] when cold after heating.
- Awhite
- Blead oxide
- Cyellow
- Dwhite
23Copper carbonate is [blank_start]green[blank_end] before heating. It turns into[blank_start] copper oxide[blank_end] and is [blank_start]black[blank_end] after heating.
- Ablack
- Bgreen
- Ccopper oxide
24Hydrogen gas, oxygen gas, carbon monoxide, methane gas and carbon dioxide gas are [blank_start]colourless and odourless [blank_end]
- Acolourless and odourless
25To test for hydrogen gas, place a [blank_start]lighted splint[blank_end] at the [blank_start]mouth[blank_end] of the test tube. It will [blank_start]extinguish[blank_end] with a [blank_start]pop sound [blank_end]
- Alighted splint
- Bmouth
- Cextinguish
- Dpop sound
26To test for oxygen gas, place a [blank_start]glowing splint [blank_end][blank_start]into[blank_end] the test tube. It will be [blank_start]rekindled[blank_end].
- Ainto
- Brekindled
- Cglowing splint
27To test for carbon dioxide gas, bubble the gas into [blank_start]limewater[blank_end] ([blank_start]calcium carbonate[blank_end]). A [blank_start]white precipitate[blank_end] is formed. The precipitate [blank_start]dissolved[blank_end] upon further bubbling.
- Alimewater
- Bcalcium carbonate
- Cwhite precipitate
- Ddissolves
28Sulfur dioxide is [blank_start]colourless[blank_end] and has a [blank_start]pungent[blank_end] smell
- Acolourless
- Bpungent
29To test for sulfur dioxide gas, place a piece of filter paper soaked with [blank_start]acidified potassium manganate (VII)[blank_end] at the [blank_start]mouth[blank_end] of the test tube. The [blank_start]purple[blank_end] potassium manganate (VII) turns [blank_start]colourless[blank_end].
- Aacidified potassium manganate (VII)
- Bmouth
- Cpurple
- Dcolourless
30Hydrogen chloride gas is [blank_start]colourless[blank_end]
- Acolourless
31To test for hydrogen chloride gas, place a piece of moist [blank_start]blue[blank_end] litmus paper at the mouth of the test tube. The [blank_start]blue[blank_end] litmus paper turns [blank_start]red[blank_end]
- Ablue
- Bblue
- Cred
32Ammonia gas (NH3) is [blank_start]colourless[blank_end] and has a [blank_start]pungent[blank_end] smell
- Acolourless
- Bpungent
33To test for ammonia gas, place a piece of moist [blank_start]red[blank_end] litmus paper at the mouth of the test tube. The [blank_start]red[blank_end] litmus paper turns [blank_start]blue[blank_end]
- Ared
- Bred
- Cblue
34Fluorine gas is [blank_start]pale yellow[blank_end] in colour at room temp
- Apale yellow
35Chlorine gas is [blank_start]greenish-yellow[blank_end] in colour and has a [blank_start]pungent[blank_end] smell in room temp
- Agreenish-yellow
- Bpungent
36To test for chlorine gas, place a piece of moist [blank_start]blue[blank_end] litmus paper at the mouth of the test tube. The [blank_start]blue[blank_end] litmus paper turns [blank_start]red[blank_end]
- Ablue
- Bblue
- Cred
37Bromine is a [blank_start]reddish-brown[blank_end] [blank_start]liquid[blank_end] at room temp. ([blank_start]Reddish-brown[blank_end] solid)
- Aliquid
- BReddish-brown
- Creddish-brown
38Iodine is a [blank_start]purplish-brown[blank_end] [blank_start]liquid[blank_end] at room temp. ([blank_start]Violet[blank_end] gas)
- Apurplish-brown
- Bliquid
- CViolet
39Astatine is a [blank_start]black[blank_end] [blank_start]solid[blank_end] at room temp
- Ablack
- Bsolid
40All nitrates are [blank_start]soluble[blank_end]
- Asoluble
41All chlorides are soluble except
- Asilver chloride
- Blead(II)chloride
- Cbarium chloride
- Dcalcium chloride
42All sulfates are soluble except
- Asilver sulfate
- Bbarium sulfate
- Clead(II)sulfate
- Dcalcium sulfate
43All carbonates are insoluble except
- Asodium carbonate
- Bpotassium carbonate
- Cammonium carbonate
- Dbarium carbonate
- Esilver carbonate
44Zinc ions + sodium hydroxide solution = [blank_start]white[blank_end] precipitate of Zn(OH)2. Precipitate [blank_start]dissolves in excess[blank_end] [blank_start]to form a colourless solution [blank_end]
- Awhite
- Bdissolves in excess
- Cto form a colourless solution
45Aluminium ions + sodium hydroxide solution = [blank_start]white[blank_end] precipitate of Al(OH)3. Precipitate [blank_start]dissolves in excess[blank_end] [blank_start]to form a colourless solution[blank_end]
- Awhite
- Bdissolves in excess
- Cto form a colourless solution
46Lead(II) ions + sodium hydroxide solution = [blank_start]White[blank_end] precipitate of Pb(OH)2. Precipitate [blank_start]dissolves in excess[blank_end] [blank_start]to form a colourless solution [blank_end]
- AWhite
- Bdissolves in excess
- Cto form a colourless solution
47Calcium ions + sodium hydroxide solution = White precipitate of Ca(OH)2). Precipitate [blank_start]is insoluble in excess [blank_end]
- Ais insoluble in excess
48Copper(II) ions + sodium hydroxide solution = [blank_start]blue[blank_end] precipitate of Cu(OH)2. Precipitate [blank_start]is insoluble in excess [blank_end]
- Ablue
- Bis insoluble in excess
49Iron(II) ions + sodium hydroxide solution = [blank_start]green[blank_end] precipitate of Fe(OH)2. Precipitate [blank_start]is insoluble in excess[blank_end]
- Agreen
- Bis insoluble in excess
50Iron(III) ions + sodium hydroxide solution = [blank_start]reddish-brown[blank_end] precipitate of Fe(OH)3. Precipitate [blank_start]is insoluble in excess [blank_end]
- Areddish-brown
- Bis insoluble in excess
51Ammonium ions (NH4+) + sodium hydroxide solution = [blank_start]no[blank_end] precipitate. On [blank_start]heating[blank_end], [blank_start]ammonia gas[blank_end] is given off. [blank_start]No change[blank_end] is observed in excess
- Ano
- Bheating
- Cammonia gas
- DNo change
52Zinc ions + aqueous ammonia = [blank_start]white[blank_end] precipitate of Zn(NH3)2. Precipitate [blank_start]dissolves in excess[blank_end] [blank_start]to form a colourless solution [blank_end]
- Awhite
- Bdissolves in excess
- Cto form a colourless solution
53Aluminium ions + aqueous ammonia = [blank_start]white[blank_end] precipitate of Al(NH3)3. Precipitate [blank_start]is insoluble in excess [blank_end]
- Awhite
- Bis insoluble in excess
54Lead(II) ions + aqueous ammonia = [blank_start]white[blank_end] precipitate of Pb(NH3)2. Precipitate [blank_start]is insoluble in excess[blank_end]
- Awhite
- Bis insoluble in excess
55Calcium ions + aqueous ammonia = [blank_start]no[blank_end] precipitate (even in [blank_start]excess[blank_end])
- Ano
- Bexcess
56Copper(II) ions + aqueous ammonia = [blank_start]blue[blank_end] precipitate of Cu(NH3)2. Precipitate [blank_start]dissolves in excess[blank_end] [blank_start]to form a deep blue solution [blank_end]
- Ablue
- Bdissolves in excess
- Cto form a deep blue solution
57Iron(II) ions + aqueous ammonia = [blank_start]green[blank_end] precipitate of Fe(NH3)2. Precipitate [blank_start]is insoluble in excess[blank_end]
- Agreen
- Bis insoluble in excess
58Iron(III) ions + aqueous ammonia = [blank_start]reddish-brown [blank_end]precipitate of Fe(NH3)3. Precipitate i[blank_start]s insoluble in excess[blank_end]
- Areddish-brown
- Bs insoluble in excess
59Ammonium ions + aqueous ammonia = [blank_start]no reaction[blank_end]
- Ano reaction
60Test for carbonate ions. Add [blank_start]dilute hydrochloric acid[blank_end], [blank_start]effervescence[blank_end] is observed. Pass the gas given off into [blank_start]limewater[blank_end], a [blank_start]white[blank_end] precipitate is formed in the [blank_start]limewater[blank_end]. [blank_start]Carbon dioxide gas[blank_end] is given off.
- Adilute hydrochloric acid
- Beffervescence
- Climewater
- Dwhite
- Elimewater
- FCarbon dioxide gas
61Test for nitrate ions. Add [blank_start]sodium hydroxide solution[blank_end], then add [blank_start]a piece of aluminium foil[blank_end] and [blank_start]warm[blank_end] the mixture, [blank_start]effervescence[blank_end] is observed. Test the gas given off with a piece of moist [blank_start]red[blank_end] litmus paper, the moist [blank_start]red[blank_end] litmus paper turns [blank_start]blue[blank_end]. [blank_start]Ammonia gas[blank_end] is given off.
- Asodium hydroxide solution
- Ba piece of aluminium foil
- Cwarm
- Deffervescence
- Ered
- Fred
- Gblue
- HAmmonia gas
62Test for sulfate ions. Add [blank_start]dilute nitric acid[blank_end] and then [blank_start]barium nitrate solution,[blank_end] a [blank_start]white[blank_end] precipitate of [blank_start]barium sulfate[blank_end] is formed.
- Adilute nitric acid
- Bbarium nitrate solution,
- Cwhite
- Dbarium sulfate
63Test for chloride ions. Add [blank_start]dilute nitric acid[blank_end] and then [blank_start]silver nitrate solution[blank_end], a [blank_start]white[blank_end] precipitate of [blank_start]silver chloride[blank_end] is formed.
- Adilute nitric acid
- Bsilver nitrate solution
- Cwhite
- Dsilver chloride
64Test for iodide ions. Add [blank_start]dilute nitric acid[blank_end] and then [blank_start]silver nitrate solution,[blank_end] a [blank_start]yellow[blank_end] precipitate of [blank_start]silver iodide[blank_end] is formed.
- Adilute nitric acid
- Bsilver nitrate solution,
- Cyellow
- Dsilver iodide
65Saturated hydrocarbons contain
- Aonly carbon-carbon single bonds
- Bat least one carbon-carbon double bond
66Unsaturated hydrocarbons contain
- Aonly carbon-carbon single bonds
- Bat least one carbon-carbon double bond
67Alkanes have [blank_start]low[blank_end] melting and boiling points, are [blank_start]insoluble[blank_end] in water and are [blank_start]soluble[blank_end] in organic solvents
- Alow
- Binsoluble
- Csoluble
68([blank_start]Complete[blank_end] combustion) Alkane/Alkene/Alcohol + oxygen = [blank_start]carbon dioxide[blank_end] + water vapour. ([blank_start]Incomplete[blank_end] combustion) Alkane/Alkene/Alcohol + oxygen = [blank_start]carbon monoxide[blank_end] + water vapour
- AComplete
- Bcarbon dioxide
- CIncomplete
- Dcarbon monoxide
69Functional group of alkenes: [blank_start]carbon-carbon double bond.[blank_end] Functional group of alcohols: [blank_start]hydroxyl[blank_end] (-[blank_start]OH[blank_end]). Functional group of carboxylic acids: [blank_start]carboxyl[blank_end] (-[blank_start]COOH[blank_end]).
- Acarbon-carbon double bond.
- Bhydroxyl
- COH
- Dcarboxyl
- ECOOH
70(Addition reactions of alkenes) Hydrogenation conditions: Temp of [blank_start]200[blank_end]•C, [blank_start]nickel[blank_end] catalyst
- A200
- Bnickel
71(Addition reactions of alkenes) Bromination conditions: Presence of [blank_start]bromine[blank_end] solution. The [blank_start]reddish-brown[blank_end] [blank_start]bromine[blank_end] [blank_start]decolourises[blank_end] into a [blank_start]colourless solution[blank_end] due to the presence of the [blank_start]carbon-carbon double bond [blank_end]
- Abromine
- Breddish-brown
- Cbromine
- Ddecolourises
- Ecolourless solution
- Fcarbon-carbon double bond
72(Substitution reactions of alkanes) Alkanes react with [blank_start]halogens[blank_end], such as chlorine and bromine, in the presence of [blank_start]UV light[blank_end]
- Ahalogens
- BUV light
73(Addition reactions of alkenes) Hydration conditions: Temp of [blank_start]300[blank_end]•C, pressure of [blank_start]60[blank_end] atm, [blank_start]phosphoric(V) acid[blank_end] catalyst. (Forms [blank_start]alcohol[blank_end])
- A300
- B60
- Cphosphoric(V) acid
- Dalcohol
74[blank_start]Alkenes[blank_end] can be obtained by the cracking of [blank_start]petroleum[blank_end], aka crude oil. Cracking is the breaking down of [blank_start]long-chain hydrocarbons[blank_end] into [blank_start]smaller molecules[blank_end]. When a catalyst is involved to speed up the process, it is called [blank_start]catalytic cracking[blank_end]
- AAlkenes
- Bsmaller molecules
- Cpetroleum
- Dlong-chain hydrocarbons
- Ecatalytic cracking
75The optimal conditions for the Haber process are: Temp of [blank_start]450[blank_end]•C, pressure of [blank_start]250[blank_end] atm and the presence of [blank_start]finely divided iron[blank_end] catalyst
- Afinely divided iron
- B450
- C250
76Fractional distillation of petroleum. (Top of fractionating column:) 1. [blank_start]Petroleum gas[blank_end] 2. [blank_start]Petrol/gasoline[blank_end] 3. [blank_start]Naphtha[blank_end] 4. [blank_start]Kerosene/Paraffin[blank_end] 5. [blank_start]Diesel oil[blank_end] 6. [blank_start]Lubricating oil[blank_end] 7. [blank_start]Bitumen[blank_end]
- APetroleum gas
- BPetrol/gasoline
- CNaphtha
- DKerosene/Paraffin
- EDiesel oil
- FLubricating oil
- GBitumen
77Petroleum gas is used as fuel for [blank_start]cooking[blank_end] and [blank_start]heating[blank_end]
- Acooking
- Bheating
78Petrol/gasoline is used as fuel for [blank_start]motorcars[blank_end]
- Amotorcars
79Naphtha is used as [blank_start]feedstock[blank_end] for making [blank_start]petrochemicals [blank_end]
- Afeedstock
- Bpetrochemicals
80Kerosene/paraffin is used as fuel for [blank_start]aircraft engine[blank_end]s, cooking using [blank_start]oil stoves[blank_end] and [blank_start]heating [blank_end]
- Aaircraft engine
- Boil stoves
- Cheating
81Diesel oil is used as fuel for [blank_start]diesel engines[blank_end] in [blank_start]buses[blank_end], [blank_start]lorries[blank_end] and [blank_start]trains[blank_end]
- Adiesel engines
- Bbuses
- Clorries
- Dtrains
82Lubricating oil is used for [blank_start]lubricating[blank_end] machines, making [blank_start]waxes[blank_end] and [blank_start]polishes[blank_end]
- Alubricating
- Bwaxes
- Cpolishes
83Bitumen is used for making [blank_start]road surfaces[blank_end] and [blank_start]roofing[blank_end]
- Aroad surfaces
- Broofing
84(Oxidation of alcohols) Alcohol + [blank_start]oxygen[blank_end] from oxidation agent (exp potassium manganate (VII)) = [blank_start]carboxylic acid[blank_end] + water
- Aoxygen
- Bcarboxylic acid
85(Producing ethanol) by fermentation. Conditions: Temp of around [blank_start]37[blank_end]•C, mix [blank_start]yeast[blank_end] with glucose solution, absence of [blank_start]air[blank_end]
- A37
- Byeast
- Cair
86(Producing ethanoic acids) Oxidation of ethanol by acidified potassium manganate (VII), ethanol + [blank_start]oxygen[blank_end] from oxidising agent = ethanoic acid + water. Oxidation of ethanol by atmospheric oxygen, ethanol + [blank_start]oxygen[blank_end] (and bacteria) from air = ethanoic acid + water
- Aoxygen
- Boxygen
87Alcohol + carboxylic acid + a few drops of [blank_start]concentrated sulfuric acid[blank_end] as catalyst = [blank_start]ester[blank_end]
- Aconcentrated sulfuric acid
- Bester
88(Naming esters) __[blank_start]alcohol[blank_end] (-yl)__ __[blank_start]carboxylic acid[blank_end] (-anoate)__
- Aalcohol
- Bcarboxylic acid
89Nylon: [blank_start]Amide[blank_end] linkage. Terylene: [blank_start]Ester[blank_end] linkage
- AAmide
- BEster
Information
- Description
- Colour of salts
- Author
- Amelia LX
- Language
- English
- Views
- 7
- History
- Created on 15 Oct 2017 · updated on 29 Oct 2017
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