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🚀 Master Chemistry with These Essential Chapter-Wise Viral MCQs for Class 12 (2026) 📚 | Boost Your Scores & Ace the Exam!🔥
🔥 Viral Textbook MCQs on Group Trends of Representative Elements 📚 | Master the Essentials for Class 12! 💥
🟥1. Melting & boiling points of which group decrease regularly down the group?
🟥 a) Group IA ️
🟦 b) Group IIIA
🟩 c) Group VIIA
🟨 d) Group VIIIA
🟦2. Which s-block element forms superoxide when burned in air?
🟥 a) Li
🟦 b) Na
🟩 c) K ️
🟨 d) Mg
🟩3. Formula of nitrides for alkaline earth metals?
🟥 a) MN₃
🟦 b) M₂N₃
🟩 c) M₃N
🟨 d) M₃N₂
🟨4. Flame colour of which alkali metal is yellow?
🟥 a) Na ️
🟦 b) K
🟩 c) Rb
🟨 d) Cs
🟥5. Chemical used in fireworks?
🟥 a) Sodium bicarbonate
🟦 b) Bleaching powder
🟩 c) Potassium nitrate ️
🟨 d) Potash alum
🟦6. Cathode in Castner Kellner cell is:
🟥 a) Titanium blocks
🟦 b) Carbon rods
🟩 c) Mercury
🟨 d) Iron container
🟩7. Diagonal member of beryllium is:
🟥 a) Mg
🟦 b) Al ️
🟩 c) Si
🟨 d) C
🟨8. Purification of SO₂ from As₂O₃ in contact process avoids:
🟥 a) Catalyst poisoning ️
🟦 b) Temperature elevation
🟩 c) Pressure controlling
🟨 d) Air mixing
🟥9. Oil of vitriol refers to:
🟥 a) Borax
🟦 b) Sulphuric Acid ️
🟩 c) Alum
🟨 d) Caustic soda
🟦10. Best oxidizing agent among halogens?
🟥 a) F₂ ️
🟦 b) Cl₂
🟩 c) Br₂
🟨 d) I₂
✅ Answers with Short Reasons
🟥1:✔️ Group IA → Alkali metals show decreasing melting & boiling points due to weaker metallic bonding.
🟦2:✔️ K → Potassium forms superoxide (KO₂) when burned in air.
🟩3:✔️ M₃N₂ → Alkaline earth metals (M²⁺) combine with N³⁻ to give M₃N₂.
🟨4:✔️ Na → Sodium imparts a bright yellow colour in flame test.
🟥5:✔️ Potassium nitrate → Used in gunpowder & fireworks as oxidizer.
🟦6:✔️ Mercury → Mercury acts as cathode in Castner-Kellner cell.
🟩7:✔️ Al → Beryllium shows diagonal relationship with Aluminium.
🟨8:✔️ Catalyst poisoning → Arsenic oxide poisons V₂O₅ catalyst in contact process.
🟥9:✔️ Sulphuric Acid → Oil of vitriol is the old name for H₂SO₄.
🟦10:✔️ F₂ → Fluorine is the strongest oxidizing agent among halogens.
💥 Viral Textbook MCQs on Outer Transition Elements 🌟| Unlock the Secrets of the d-Block for Class 12! 🔥
🟥1. Zn²⁺ ion is colourless because
🟥 a) Its 4s orbital is empty
🟦 b) Its 3d orbitals have all unpaired electrons
🟩 c) Its 3d orbitals have all paired electrons
🟨 d) Its d-orbitals cannot split up into t₂g and eg
🟦2. The coordination number of cobalt in Na₄[Co(C₂O₄)₃] is
🟥 a) 3
🟦 b) 4
🟩 c) 6
🟨 d) 8
🟩3. An example of a bidentate ligand among the following is:
🟥 a) OH⁻
🟦 b) C₂O₄²⁻
🟩 c) CO₃²⁻
🟨 d) CN⁻
🟨4. A highly paramagnetic ion among the following is
🟥 a) Fe²⁺
🟦 b) Fe³⁺
🟩 c) Co²⁺
🟨 d) Cr³⁺
🟥5. The highest oxidation state of chromium is:
🟥 a) +4
🟦 b) +5
🟩 c) +6
🟨 d) +7
🟦6. This element is not used for electroplating:
🟥 a) Zinc
🟦 b) Tin
🟩 c) Chromium
🟨 d) Manganese
🟩7. Which of the following steel is typically used in making fry pans?
🟥 a) Carbon steel
🟦 b) Stainless steel
🟩 c) Tool steel
🟨 d) Alloy steel
🟨8. Which step in the extraction of copper from chalcopyrite eliminates gangue impurities?
🟥 a) Concentration
🟦 b) Roasting
🟩 c) Smelting
🟨 d) Bessemerization
🟥9. 5d series of outer transition elements is
🟥 a) Sc to Zn
🟦 b) Y to Cd
🟩 c) La to Hg
🟨 d) Ac to Cn
🟦10. Oxidation of manganese in air gives the following oxide:
🟥 a) MnO
🟦 b) MnO₂
🟩 c) Mn₂O₃
🟨 d) Mn₃O₄
✅ Answers with short reasons
🟥1: c) Zn²⁺ is 3d¹⁰ (all paired), so no d–d transitions; hence colourless.
🟦2: c) Each oxalate (C₂O₄²⁻) is bidentate; three ligands give coordination number 6.
🟩3: b) Oxalate has two donor oxygens and chelates the metal (bidentate).
🟨4: b) Fe³⁺ (high spin d⁵) has five unpaired electrons, making it strongly paramagnetic.
🟥5: c) Chromium reaches +6 in compounds like CrO₃ and chromates/dichromates.
🟦6: d) Manganese is not commonly used for electroplating due to unstable plating baths and poor deposits.
🟩7: b) Stainless steel resists corrosion and is widely used for cookware like fry pans.
🟨8: a) Concentration (e.g., froth flotation) removes gangue before roasting/smelting.
🟥9: c) The 5d transition series is conventionally listed as La to Hg in outer transition elements classification.
🟦10: d) Manganese oxidizes in air to mixed oxide Mn₃O₄ under typical conditions.
🔥 Viral Textbook MCQs on Organic Compounds 🧪 | Ace the Class 12 Exam with These Must-Know Questions! 🌟
🟥1. Which of the following functional group contains a nitrogen atom?
🟥 a) Alcohol
🟦 b) Ketone
🟩 c) Ester
🟨 d) Amide
🟦2. A closed chain hydrocarbon with an alternate double bond is known as
🟥 a) Aliphatic
🟦 b) Aromatic
🟩 c) Alicyclic
🟨 d) Carboxylic
🟩3. Fractional distillation of coal gives coke, coal tar, coal gas and
🟥 a) Natural gas
🟦 b) Ammonia liquor
🟩 c) Naphtha
🟨 d) Petroleum
🟨4. The nuisance of knocking can be reduced by the process
🟥 a) Reforming
🟦 b) Refining
🟩 c) Distillation
🟨 d) Condensation
🟥5. The general formula of the homologous series of alcohol is
🟥 a) CₙH₂ₙO
🟦 b) CₙH₂ₙ₊₂O
🟩 c) CₙH₂ₙ₋₂O
🟨 d) CₙH₂ₙ₊₁O
🟦6. The number of five-membered and six-membered rings in C₆₀ Bucky ball are respectively
🟥 a) 12 and 12
🟦 b) 5 and 15
🟩 c) 12 and 20
🟨 d) 40 and 20
🟩7. Which of the following pairs of compounds represents isomerism?
🟥 a) C₂H₅OH & C₃H₇OH
🟦 b) CH₃OCH₃ & C₂H₅OH
🟩 c) C₂H₅CH₂Cl & C₃H₇CH₂Cl
🟨 d) CH₃NH₂ & CH₃CH₂NH₂
🟨8. Which of the following is hard and high-ranked coal?
🟥 a) Peat
🟦 b) Lignite
🟩 c) Bituminous
🟨 d) Anthracite
🟥9. Which of the following hydrocarbon is the chief constituent of natural gas?
🟥 a) CH₄
🟦 b) C₂H₆
🟩 c) C₃H₈
🟨 d) C₄H₁₀
🟦10. Urea was first synthesized by Wohler from an inorganic material named as
🟥 a) Ammonium nitrate
🟦 b) Ammonium chloride
🟩 c) Ammonium bicarbonate
🟨 d) Ammonium cyanate
✅ Answers with Short Reasons
🟥1:✔️ Amide → contains nitrogen in –CONH₂ group.
🟦2:✔️ Aromatic → closed chain with alternating double bonds (benzene-like).
🟩3:✔️ Ammonia liquor → obtained along with coke, coal tar, coal gas.
🟨4:✔️ Reforming → reduces knocking by improving fuel quality.
🟥5:✔️ CₙH₂ₙ₊₂O → general formula for alcohols.
🟦6:✔️ 12 five-membered + 20 six-membered rings form the C₆₀ buckyball.
🟩7:✔️ CH₃OCH₃ & C₂H₅OH → functional isomers (ether vs alcohol).
🟨8:✔️ Anthracite → hardest, highest carbon content coal.
🟥9:✔️ CH₄ → methane is the chief constituent of natural gas.
🟦10:✔️ Ammonium cyanate → Wohler synthesized urea from this inorganic salt.
💥 Viral Textbook MCQs on Nomenclature of Organic Compounds 🧬 | Master Naming Skills for Class 12! 🔥
🟥1. Which of the following molecules possess acyl functional group?
🟥 a) R–CO–X
🟦 b) R–CONH₂
🟩 c) R–COO–CH₃
🟨 d) R–CO–R
🟦2. A hydrocarbon with the molecular formula C₇H₁₂ is possibly
🟥 a) Heptane
🟦 b) Heptene
🟩 c) Heptyne
🟨 d) Heptadiene
🟩3. An organic compound with formula CH₃CH=CH–C≡CH, correct IUPAC name is
🟥 a) 1-pentyne-3-ene
🟦 b) 3-pentene-1-pentyne
🟩 c) 3-penten-1-yne
🟨 d) 2-penten-3-yne
🟨4. IUPAC name of isopropyl alcohol is
🟥 a) 1-propanol
🟦 b) 2-propanol
🟩 c) 1-butanol
🟨 d) 2-butanol
🟥5. Resorcinol is a phenol, it contains two –OH groups at:
🟥 a) Position 1 and 2
🟦 b) Position 1 and 3
🟩 c) Position 1 and 4
🟨 d) Position 2 and 4
🟦6. Formula of a saturated hydrocarbon is C₄H₈, it should be
🟥 a) Butane
🟦 b) Butene
🟩 c) Butyne
🟨 d) Cyclobutane
🟩7. In the IUPAC naming of ketones, the ending –e of main carbon chain is replaced by
🟥 a) yl
🟦 b) ol
🟩 c) al
🟨 d) one
🟨8. In the common system, carboxylic acid with six carbon atoms in straight chain is named as
🟥 a) Propionic acid
🟦 b) Valeric acid
🟩 c) Caproic acid
🟨 d) Capric acid
🟥9. The correct structure of 1,3-pentadiene is
🟥 a) CH₃–CH=CH–CH=CH₂–CH₃
🟦 b) CH₂=CH–CH₂–CH=CH₂
🟩 c) CH₂=CH–CH=CH–CH₃
🟨 d) CH₃–CH=C=CH–CH₃
🟦10. The IUPAC name of CH₃COOCH(CH₃)₂ is
🟥 a) isopropyl ethanoate
🟦 b) Ethyl propanoate
🟩 c) isopropyl acetate
🟨 d) Propyl ethanoate
✅ Answers with Short Reasons
🟥1:✔️ Acyl group is –CO–X (X = halogen/other substituent).
🟦2:✔️ C₇H₁₂ fits formula for alkadiene (CₙH₂ₙ₋₂), hence heptadiene and alkyne and hence heptyne.
🟩3:✔️ Double bond at C3 and triple bond at C1 → 3-penten-1-yne.
🟨4:✔️ Isopropyl alcohol is IUPAC 2-propanol.
🟥5:✔️ Resorcinol has –OH at positions 1 and 3 on benzene ring.
🟦6:✔️ C₄H₈ saturated hydrocarbon must be cyclic → cyclobutane.
🟩7:✔️ Ketones end with suffix “–one” (e.g., propanone).
🟨8:✔️ Six-carbon straight chain acid is caproic acid.
🟥9:✔️ 1,3-pentadiene = CH₂=CH–CH=CH–CH₃.
🟦10:✔️ Ester with CH₃COO– and isopropyl group = isopropyl ethanoate.
🔥 Viral Textbook MCQs on Hydrocarbons 🌿 | Crack the Class 12 Exam with These Key Questions! 💥
1. The final product obtained when hydrogen bromide (HBr) is added to an ethyne molecule:
🟩 a) 1,1-dibromoethane
🟦 b) 1,2-dibromoethane
🟨 c) 1,1,2,2-tetrabromoethane
🟧 d) Bromoethane
2. The formula of saturated hydrocarbon is C3H6, it should be:
🟩 a) Propane
🟦 b) Propene
🟨 c) Propyne
🟧 d) Cyclopropane
3. Ozonide on heating with zinc dust produces:
🟩 a) Alcohol
🟦 b) Aldehyde
🟨 c) Alkene
🟧 d) Ether
4. Which of the following pairs of compounds represents functional group isomerism?
🟩 a) 1-butene and 2-butene
🟦 b) Ethanol and dimethyl ether
🟨 c) n-butane and isobutene
🟧 d) Diethyl ketone and methyl propyl ketone
5. The substituent that can act as a meta director is:
🟩 a) –Cl
🟦 b) –CH₃
🟨 c) –OH
🟧 d) –COOH
6. Welding gas among the following is:
🟩 a) Ethylene
🟦 b) Acetylene
🟨 c) Ethane
🟧 d) Methane
7. Benzene burns with smoky flame because of its:
🟩 a) Inflammability
🟦 b) High carbon %age
🟨 c) High resonance energy
🟧 d) Aromaticity
8. Select the suitable chemical to distinguish between ethene and ethyne:
🟩 a) Alkaline KMnO₄
🟦 b) Acidified KMnO₄
🟨 c) Bromine water
🟧 d) Ammonical AgNO₃
9. Meta directing group among the following is:
🟩 a) –OH
🟦 b) –NH₂
🟨 c) –CH₃
🟧 d) –NO₂
10. Acylation of benzene in the presence of AlCl₃ gives:
🟩 a) Toluene
🟦 b) Acetophenone
🟨 c) Phenol
🟧 d) Xylene
✅ Answer Key with Short Reasons
🟥1: 1,1-dibromoethane → HBr adds twice to ethyne, giving geminal dibromide.
🟦2: Cyclopropane → C₃H₆ is saturated only if cyclic.
🟩3:Aldehyde → Ozonide cleavage with Zn gives aldehydes.
🟨4: Ethanol & Dimethyl ether → Same formula, different functional groups (alcohol vs ether).
🟥5: –COOH → Strongly electron withdrawing, meta-directing in electrophilic substitution.
🟦6: Acetylene → Used in oxy-acetylene welding.
🟩7: High carbon %age → Excess carbon leads to incomplete combustion → smoky flame.
🟨8: Ammonical AgNO₃ → Ethyne forms silver acetylide, ethene does not.
🟥9: –NO₂ → Classic meta-directing group due to –M and –I effects.
🟦10:Acetophenone → Friedel–Crafts acylation of benzene with CH₃COCl/AlCl₃ gives acetophenone.
غزل (جونؔ ایلیا)
آج لب گہر فشاں آپ نے وا نہیں کیا
تذکرۂ خجستۂ آب و ہوا نہیں کیا
کیسے کہیں کہ تجھ کو بھی ہم سے ہے واسطہ کوئی
تو نے تو ہم سے آج تک کوئی گلہ نہیں کیا
جانے تری نہیں کے ساتھ کتنے ہی جبر تھے کہ تھے
میں نے ترے لحاظ میں تیرا کہا نہیں کیا
مجھ کو یہ ہوش ہی نہ تھا تو مرے بازوؤں میں ہے
یعنی تجھے ابھی تلک میں نے رہا نہیں کیا
تو بھی کسی کے باب میں عہد شکن ہو غالباً
میں نے بھی ایک شخص کا قرض ادا نہیں کیا
ہاں وہ نگاہ ناز بھی اب نہیں ماجرا طلب
ہم نے بھی اب کی فصل میں شور بپا نہیں کیا
دل نے وفا کے نام پر کارِ وفا نہیں کیا
خود کو ہلاک کر لیا، خود کو فدا نہیں کیا
کیسے کہیں کہ تجھ کو بھی ہم سے ہے واسطہ کوئی
تو نے تو ہم سے آج تک کوئی گلہ نہیں کیا
جو بھی ہو تم پہ معترض، اُس کو یہی جواب دو
آپ بہت شریف ہیں، آپ نے کیا نہیں کیا
جس کو بھی شیخ و شاہ نے حکمِ خُدا دیا قرار
ہم نے نہیں کیا وہ کام، ہاں باخُدا نہیں کیا
نسبتِ علم ہے بہت حاکمِ وقت کو عزیز
اُس نے تو کارِ جہل بھی بے علما نہیں کیا
جون ایلیا
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