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Chemistry Chapter 9 to 16 Solved MCQs |
You can easily Download 2nd Year F.Sc II Chemistry Notes in PDF and Online Quiz Test here for preparations of Chemistry Subject 12th Class FSC Part 2 Notes. All Solved F.Sc 2nd Year Chemistry Notes Pindi Board in PDF and otheres punjab boards Chemistry 2nd Year Notes,Short Questions,Numerical Problems.
12th Class Chemistry MCQs Chapter 9 Aromatic Hydrocarbons Punjab Board
Question 1: Aromatic compounds burn with sooty flame because ?
- They have a high percentage of carbon
- They have high percentage of hydrogen
- they resist reaction with air
- they have a ring structure
A
Question 2: The reaction shown here is ?
- An electrophilic addition reaction
- A reduction-addition reaction
- An electrophilic substitution reaction.
- An electrophilic elimination reaction
C
Question 3: On hydrogenation benzene liberates energy ?
- 358.5 kJ/mole
- 119 kJ-mol⁻¹
- 150.5 kJ-mol⁻¹
- 208 kJ-mol⁻¹
D
Question 4: The benzene molecule contains ?
- Two double bonds
- Three double bonds
- One double bonds
- Delocalized π-electrons
D
Question 5: The benzene ring is oxidized to maleic anhydride when strongly heated with ?
- AlCl₃/150°C
- Ni/200°C
- V₂O₅/450°C
- Sunlight
C
Question 6: Aromatic hydrocarbons are derivatives of ?
- Alkene
- Cyclohexane
- Normal series of paraffins
- Benzene
D
Question 7: The C – C bond in benzene is formed by hybridized carbon atom and overlapping is due to ?
- sp²-sp²
- sp³ -sp³
- dsp³-dsp³
- sp-p
A
Question 8: The carbons in the benzene ring are ?
- not hybridized
- sp² hybridized
- Sp hybridized
- sp’ hybridized
B
Question 9: Shape of benzene molecule is ?
- Planar trigonal
- Plane hexagonal
- Pyramidal
- Linear
B
Question 10: During nitration of benzene, the active nitrating agent is ?
- NO₃
- HNO₃
- NO₂
- NO₂⁺
D
Question 11: The number of 6-bonds in benzene are ?
- 12
- 8
- 4
- 6
A
Question 12: The electrophile in aromatic sulphonation is ?
- SO₃
- HSO₄
- H₂SO₄
- SO₃⁺
A
Question 13: Which of the following acid can be used as catalyst in Friedel-Craft’s reaction ?
- AlCl₃
- HNO₃
- NaCl
- BeCl₂
A
Question 14: Hexanol structure of benzene was confirmed by ?
- NMR
- HPLC
- Mass
- X-ray
D
Question 15: All the following are monosubstituted aromatic compounds, except ?
- Toluene
- Phenol
- Benzoic acid
- Xylene
D
Question 16: Amongst the following, the compound that can be most readily sulphonated is ?
- Nitrobenzene
- Benzene
- Toluene
- Chlorobenzene
C
12th Class Chemistry MCQs Chapter 10 Alkhl Halides Punjab Board
Question 1: Which of the following solvents is used instead of ether in the preparation of Grignard’s reagent ?
- THF
- H₅ C₆OCH₃
- All of these
- C₆H₅N(CH₃)₂
C
Question 2: Elimination bimolecular reactions involve ?
- Third order kinetics
- First order kinetics
- Zero order kinetics
- Second order kinetics
D
Question 3: SN2 mechanism involves ?
- 3rd order kinetic
- Zero order kinetic
- 1st order kinetic
- 2nd order kinetic
D
Question 4: Which of the following do not form Grignard’s reagent ?
- CH₃F
- CH₃Br
- CH₃I
- HC₃ - C l
A
Question 5: SN2 reaction can be best carried out with ?
- Secondary R – X
- None of the above
- Primary R – X
- Tertiary R – X
C
Question 6: The substances which donates a pair of electron to lectrophile are called ?
- Dibasic acid
- Electrophile
- Nucleophile
- Lewis acid
C
Question 7: Grignard reagent is reactive due to ?
- The presence of Mg atom
- The polarity of C-Mg bond
- None of the above
- The presence of halogen atom
B
Question 8: In primary alkyl halides, the halogen atom is attached to a carbon which is further attached to how many carbon atoms ?
- Four
- Three
- One
- Two
C
Question 9: Ethanal has ----------------- sigma bonds ?
- 8
- 5
- 7
- 6
D
Question 10: Which of the following is not a nucleophile ?
- NH₃
- H₂S
- H₂O
- BF₃
D
Question 11: Which one of the following ions is most stable ?
- None
- Sec carbonium ion
- Primary carbonium ion
- Ter-carbonium ion
D
Question 12: Which of the following compound is acetophenone ?
- C₆H₅COC₆H₅
- C₆H₅CHO
- C₃HCOCH₃
- C₆H₅COCH₃
D
Question 13: In β-elimination reaction, nucleophile attacks on ?
- β- hydrogen
- α-hydrogen
- α- hydrogen
- Hydrogen
A
Question 14: Ethyl bromide when reduces with ascent hydrogen, the product will be ?
- Ethane
- Ethyl alcohol
- Butane
- Propane
A
Question 15: Ethyl bromide is heated with Ag₂O in the absence of moisture, the product formed is ?
- Ethene
- Diethyl ether
- Acetaldehyde
- Ethanol
B
Question 16: For which mechanisms, the first step involved is the same ?
- E₂ and SN2
- E₁ and SN1
- E₁ and E₂
- E₁ and E₂
B
Question 17: Acetic acid can be obtained from CH₃MgI by treatment with ?
- CO₂
- CINH₂
- HCHO
- H₂O
A
12th Class Chemistry MCQs Chapter 11 Alcohols Phenols and Ethers Punjab Board
Question 1: Sodium salt of benzene sulphonic acid on fusion with caustic soda gives ?
- Phenol
- Benzene
- Benzoic acid
- None of theses
A
Question 2: Ethanol can be converted to acetaldehyde by ?
- Dehydration
- Hydrogenation
- Oxidation
- Hydroxylation
C
Question 3: Phenol is also known as ?
- Carbonic acid
- Citric acid
- Carbolic acid
- Maleic acid
C
Question 4: Hydrolysis of glucose to ethyl alcohol is carried by ?
- Zymase
- Lactase
- Diastase
- Invertase
A
Question 5: Dimethyl ether and ethyl alcohol are ?
- Cis-trans isomers
- Position isomers
- Functional group isomers
- Metamers
C
Question 6: The enzyme involved in fermentation of molasses to form ethyl alcohol is ?
- Both (b) and (c)
- Diastase
- Invertase
- Zymase
B
Question 7: Which compound is called universal solvent ?
- H₃C – O – CH₃
- H₃C – OH
- H₃C – CH₂ – OH
- H₂O
D
Question 8: Rectified spirit contains alcohol about ?
- 90%
- 85%
- 95%
- 80%
C
Question 9: According to Lewis concept, ethers behave as ?
- Acid as well as base
- Acid
- None of these
- Base
D
Question 10: The solubility of higher alcohols decrease because they tend to resemble ?
- Hydrocarbons
- Sugars
- Glucose
- Aldehydes
A
Question 11: Which substance is used as antifreeze ?
- Methanol
- Ethanol
- Acetone
- Acetic acid
D
Question 12: Methyl alcohol is not used ?
- As an anti-freezing agent
- For denaturing of ethyl alcohol
- As a substitute of petrol
- As a solvent
C
Question 13: Which enzymes is not involved in fermentation of starch ?
- Invertase
- Urease
- Zymase
- Diastase
B
Question 14: Ethane can be converted into ethanic acid by ?
- Hydrolysis
- Hydration
- Oxidation
- Hydrogenation
A
Question 15: Which one of the following ethers is unsymmetrical ether ?
- Ethoxy ethane
- Methoxy methane
- Methoxy benzene
- Phenoxy benzene
C
Question 16: Which compound shows maximum hydrogen bonding with water ?
- CH₃OH
- C₂H₅OH
- C₆H₅OH
- CH₃ – O – CH₃
B
12th Class Chemistry MCQs Chapter 12 Aldehydes and Ketones Punjab Board
Question 1: Benzyl alcohol is obtained from benzaldehyde by ?
- Perkin reaction
- Cannizzaro’s reaction
- Claisen reaction
- Wurtz reaction
B
Question 2: Which of the following reagent will react with both aldhydes and ketones ?
- Bendict’s reagent
- Tollen’s regent
- Grignard reagent
- Fehling’s reagent
C
Question 3: Ketones are produced by the dehydrogenation of ?
- Secondary alcohol
- Tertiary alcohol
- Aldehyde
- Primary alcohol
A
Question 4: Ketones are prepared by the oxidation of ?
- Primary alcohol
- None of these
- Secondary alcohol
- Tertiary alcohol
C
Question 5: All of the following tests are used to identify aldehydes except ?
- Baeyer’s test
- Fehling test
- Benedicts test
- Tollen’s test
A
Question 6: Which of the following will have the highest boiling point ?
- Propanal
- Methanol
- 2-hexanone
- Ethanal
C
Question 7: Silver mirror test is given by ?
- Ketones
- Aldehydes
- Acids
- Ethers
B
Question 8: Which of the following compounds will not give iodoform test on treatment with I₂/NaOH ?
- 3-pentanone
- Acetone
- Acetaldehyde
- Butanone
D
Question 9: The important step in Cannizzaro’s reaction is the intermolecular shift of ?
- Proton
- Hydronium ion
- Hydrogen atom
- Hydride ion
D
Question 10: Which of the following reagents can distinguish between aldehyde and ketone ?
- Grignard reagent
- Ammonical silver nitrate
- H₂SO₄
- Bayer’s solution
A
Question 11: Acetone reacts with HCN to form cyanohydrins. It is an example of ?
- Nucleophilic substitution
- Nucleophilic addition
- Electrophilic addition
- Electrophilic substitution
D
Question 12: Ketones are prepared by the oxidation of ?
- Secondary alcohol
- Primary alcohol
- Tertiary alcohol
- None of these
A
Question 13: The carbon atom of carbonyl group is ?
- sp³ hybridized
- sp² hybridized
- Sp hybridized
- None of these
B
Question 14: Which of the following is not derivative of NH₃ ?
- Phenyl hydrazine
- Picric acid
- Alanine
- Hydrazine
B
Question 15: The general formula of aldehyde is ?
- CnH₂n
- CnH₂nO H
- CnH₂nO
- CnH₂n₊₂O
C
Question 16: Cannizzaro’s reaction is not given by ?
- Benzaldehyde
- Formaldehyde
- Acetaldehyde
- Tarimethylacetaldehyde
C
Question 17: Which one of the following is the strongest reducing agent ?
- C₃H₈
- C₃H₇OH
- CH₃COCH₃
- C₂H₅CHO
D
12th Class Chemistry MCQs Chapter 13 carboxylic Acids Punjab Board
Question 1: Which one of the following metal cannot evolve hydrogen from acetic acid ?
- Sodium
- Potassium
- Magnesium
- Zinc
A
Question 2: Which acid is used in the manufacture of synthetic fiber ?
- Carbonic acid
- Acetic acid
- Oxalic acid
- Formic acid
B
Question 3: Which one of the following is unsaturated carboxylic acid ?
- Succinic acid
- Maleic acid
- Malonic acid
- Oxalic acid
B
Question 4: Which reagent is used to reduce a carboxylic group to an alcohol ?
- H₂/Ni
- LiAlH₄
- H₂/Pt
- NaBH₄
B
Question 5: Vinegar contains acetic acid nearly ?
- 30%
- 20%
- 6-10%
- 20-15%
C
Question 6: The product obtained when acetic acid is treated with phosphorous trichloridie ?
- H₃C – C ║O – Cl
- H₃C – C ║O – O – PCl₃
- Cl – CH₂ – C ║O – O – H
- H₃C – C ║O – O – Cl
A
Question 7: Acetic acid is-obtained from ethyl alcohol by ?
- Oxidation
- Hydrogenation
- Fermentation
- Reduction
A
Question 8: Acetanide is prepared by ?
- Heating methyl cyanide
- Heating ammonium acetate
- Ethyl acetate
- Acetic anhydric
B
Question 9: The solution of which acid is used for seasoning of food ?
- Acetic acid
- Benzoic acid
- Formic acid
- Butanoic acid
A
Question 10: Which of the following is not a fatty acid ?
- Acetic acid
- Phthalic acid
- Propanoic acid
- Butanoic acid
B
Question 11: Acetic acid is manufactured by ?
- Ozonolysis
- Fermentation
- Esterification
- Distillation
B
Question 12: Which one of the following amino acid is basic ?
- Alanine
- Proline
- Lysine
- Valine
C
Question 13: Which one of the following is not a fatty acid ?
- Acetic acid
- Butanoic acid
- Propanoic acid
- Phthalic acid
D
Question 14: The nature of alanine is ?
- Basic
- Neutral
- Acid
- Weekly acid
B
Question 15: Which of the following derivative can’t be prepared directly from acetic acid ?
- Ethyl ethanoate
- Acetamide
- Acetyl chloride
- Acetic anhydride
B
Question 16: Reverse of esterification is known as ?
- Neutralization
- Saponification
- Transesterification
- Hydrolysis
D
Question 17: Hydrolysis of nitrites with alkaline solution gives ?
- Esters
- Cyanides
- Carboxylic acid
- Amides
C
12th Class Chemistry MCQs chapter 14 Macromeloecules Punjab Board
Question 1: The non-protein part of enzyme is called ?
- Apo enzyme
- Co-enzyme
- Substrate
- Activator
B
Question 2: Starch is a polymer of ?
- α-D-glucose
- Sucrose
- Fructose
- Lactose
A
Question 3: The reaction between fat and NaOH is called ?
- Saponification
- Fermentation
- Hydrogenlysis
- Esterification
A
Question 4: Which of these polymer is an synthetic polymer ?
- Terylene
- all of these
- Polystyrene
- Nylon 6, 6
B
Question 5: The fiber which is made form acrylonitrile as monomers ?
- PVC
- Acrylic fiber
- Rayon fiber
- Polyester fiber
B
Question 6: A polymeric substance that is formed in the liquid state and then hardened to a right solid is called a ?
- Fiber
- Polyamide resin
- Varnish
- Plastic
D
Question 7: Which one of the following enzymes brings about the hydrolysis of fats ?
- Urease
- Zymase
- Lypase
- Maltase
C
Question 8: Which of these polymers is an addition polymer ?
- Nylon 6, 6
- Epoxy resin
- Polysterene
- Terylene
C
Question 9: The formula of cholesterol is ?
- C₂₃H₄₆O
- C₂₀H₃₀O
- C₂₇H₄₆O
- C₂₅H₄₈
C
Question 10: Which one of the following compounds is not of a polymer ?
- Glucose
- Protein
- Starch
- Nylon 6, 6
A
Question 11: A long thin, thread like structure is called ?
- Paint
- Fiber
- Varnish
- Plastic
B
Question 12: Chose the polymer which is obtained by condensation polymerization ?
- Polyester
- Poly styrene
- Polyvinyl chloride
- Polyvinyl acetate
A
Question 13: Which one of the following is a water soluble vitamin ?
- A
- C
- E
- D
B
Question 14: Which one of the following elements is not present in all proteins ?
- Sulphur
- Hydrogen
- Nitrogen
- Carbon
A
Question 15: Sugar becomes black when conc. H₂SO₄ is added to it. It is due to ?
- Hydration
- Dehydration
- Decolourization
- Hydrolysis
B
Question 16: The degree of unsaturation of oil and fat is measured by ?
- Octane number
- Acid number
- Saponification number
- Iodine number
D
Question 17: The amount of free fatty acid in fast and oil is determined by ?
- Acid number
- Iodine number
- Saponification number
- Gold number
A
12th Class Chemistry MCQs Chapter 15 Common Chemical Industries in Pakistan Punjab Board
Question 1: Which of the following fertilizers, contains 75% nutrient ?
- DAP
- TAP
- NH₄NO₃
- Urea
A
Question 2: The percentage of gypsum in the cement is ?
- 1 – 2%
- 3 – 4%
- 2 – 5%
- 2 – 3%
C
Question 3: Setting process of cement is based upon ?
- Oxidation
- Dehydration
- Hydration
- Hydrolysis
C
Question 4: How many zones though which the charge passes in rotary kiln ?
- 2
- 5
- 3
- 4
D
Question 5: Prilling is a process in which ?
- Concentration of urea is increased
- Some other ingredients are added to urea
- Water is removed from urea
- Molten urea is converted to solid drops
D
Question 6: Which one of the following is calcarious material ?
- Blast furnace slag
- Shale
- Marine shell
- Clay
C
Question 7: Which fertilizer is the source of phosphorus for plants ?
- Noshader
- Murate of Potash
- Calcium super phosphate
- Urea
C
Question 8: Which woody raw material is used for the manufacture of paper pulp ?
- Poplar
- Rice strain
- Bagasse
- Cotton
A
Question 9: Which of the following is main process in paper industry ?
- Stock preparation
- Bleaching
- Digestion
- Screening
C
Question 10: Potassium fertilizers are especially useful for ?
- All of these
- Potato
- Coffee
- Tobacoo
A
Question 11: The macronutrients are required in ranging from ?
- 1 – 100 kg
- 5 – 200 g
- 5 – 200 kg
- 6 – 200 g
C
Question 12: Which substance is used to bleach the pulp ?
- NaCl
- NaOH
- Na₂SO₃
- NaClO
D
Question 13: Newspapers can be recycled how many times ?
- 7
- 5
- 3
- 2
B
Question 14: Which one of the following raw materials is not present in the cement ?
- Blast furnace slag
- Limestone
- Red lead
- Gypsum
C
Question 15: The composition of rock phosphate is ?
- Ca(H₃ PO₄)₂
- CaH₃PO₄
- Ca₃(PO₄)₂
- Ca₃(PO₄)CaF₂
C
Question 16: The most widely used nitrogen fertilizer in Pakistan is ?
- Ammonium nitrate
- Urea
- Ammonium sulphurate
- Ammonium
B
Question 17: Which of the following is not common domestic materials which are recycled ?
- Paper
- Glass
- Iron
- Plastics
C
12th Class Chemistry MCQs Chapter 16 Environmental Chemistry Punjab Board
Question 1: What is thickness of ozone layer ?
- 1 km only
- 25 – 28 km
- 5 m only
- 30 – 60 km
B
Question 2: What is the thickness of atmosphere ?
- 1000 km
- 1500 km
- 100 km
- 500 km
A
Question 3: The main pollutant of leather tanneries in the waste water is due to the salt of ?
- Lead
- Copper
- Chromium (VI)
- Chromium (III)
C
Question 4: Peroxyacety nitrate (PAN) is an ioritant to human beings and it affects ?
- Eyes
- Stomach
- None
- Ear
A
Question 5: The pH of acid rain is ?
- 6 – 5.6
- 7 – 6.5
- 6.5 – 6
- Less than 5.6
D
Question 6: How much fresh water is used for domestic purpose ?
- 8%
- 100%
- 69%
- 23%
A
Question 7: A single chloride free radical can destroy how many ozone molecules ?
- 100
- 10
- 100,000
- 10.000
C
Question 8: Which one of the following is not a pollutant ?
- SO₂
- CO₂
- NO₂
- CO
B
Question 9: The combination of smoke and fog is called ?
- Smog
- Secondary pollutant
- Coagulation
- Primary pollutant
A
Question 10: Ecosystem is a smaller unit of ?
- Atmosphere
- Lithosphere
- Hydrosphere
- Biosphere
D
Question 11: The smog which has high contents of SO₂ in it is called ?
- Reducing smog
- Oxidizing smog
- Neutral smog
- Natural smog
A
Question 12: The normal amount of overhead ozone is about ?
- 345 DU
- 350 DU
- 335 DU
- 340 DU
B
Question 13: The yellowish colour in photochemical smog is due to the presence of ?
- NO₂
- NO
- SO₂
- CO₂
A
Question 14: In purification of potable water the coagulant used is ?
- Copper Sulphate
- Barium sulphate
- Nicke sulphate
- Alum
D
Question 15: Fungicides are the pesticides which ?
- Kill plants
- Kill herbs
- Kill insects
- Control the growth of fungus
D
Question 16: In which layer of atmosphere, ozone is present ?
- Stratosphere
- Mesosphere
- Troposphere
- Thermosphere
A
Question 17: To avoid the formation of toxic compounds with chlorine which substance is used for disinfecting water ?
- Chloramines
- Alums
- O₃
- KMnO₄
C
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