12th Chemistry vvi Objectives 2026 | Class 12 Chemistry 1000 Objective Question 2026 Bihar Board

TLDR;

Alright, so this session is all about cracking the Chemistry exam for Class 12th, Bihar Board style. Sir's gonna drill through 1000 objective questions, chapter by chapter, to make sure everyone scores big, even if you're just starting out or need a solid revision. It's a long class, but stick around till the end, and don't forget to share the love with your friends!

1000 objective questions covering the entire Chemistry syllabus.
Questions suitable for all levels of preparation.
Focus on revision and concept clarity.

Introduction [0:15]

Namaste and welcome to Science Sangrah Bihar Board YouTube channel! Sir is super pumped for this special class, the first of the new year, aimed at helping Class 12th students nail their Chemistry exam. If you're dreaming of acing Chemistry with a perfect score, this session is a must-watch. Sir urges everyone to stay till the end, as he'll be covering 1000 objective questions from the entire Chemistry syllabus. Whether you've been studying hard or are just starting, this class is designed to help you revise and score high. Share this video with all your friends and let's make this first class of the year a grand success!

Solid State Questions [4:08]

The first question asks about which of the following will show anisotropy, to which the answer is crystal. Next, noble gases are chemically inactive because their outermost shell is completely filled. Moving on, primary alcohol on oxidation gives aldehyde as the first compound. The next question is which polymer has amide linkage, to which the answer is nylon 6,6. A crystalline solid has long range order. To obtain an n-type semiconductor, silicon is doped with a pentavalent impurity. Teflon and neoprene are examples of homopolymers. A pyranose ring has five carbon atoms. Fructose is the sweetest sugar.

Voids and Molecular Forms [8:34]

Cubic close-packed and body-centered cubic structures have void percentages of 26% and 32%, respectively. Phosphorus exists as P4 in the molecular state, with 6 P-P bonds and 4 lone pairs, and a 60-degree angle. Keratin, a structural protein, is found in hair, wool, and silk. An ABC ABC arrangement is known as cubic close packing (CCP). Nylon 66 is not an example of an additive polymer. Schottky defects occur when equal numbers of cations and anions are missing from the crystal lattice. AgCl does not exhibit Frenkel defects.

Tetrahedral Structures and Gas Solubility [12:30]

XO4 has a tetrahedral shape. Sulphide ores are usually concentrated using the froth flotation method. Helium is the least soluble gas in water. Vitamin A is fat-soluble. The structure with three OH groups is tribasic. Molality is measured in moles per kg. Paramagnetism is caused by unpaired electrons. Tollen's reagent is ammoniacal silver nitrate. The aqueous solution with the highest boiling point is Na3PO4.

Hinsberg's Reagent and Vapor Pressure [16:32]

Hinsberg's reagent is benzene sulphonyl chloride, used to identify 1, 2, and 3-degree amines. The relative decrease in vapor pressure equals the mole fraction of the solute. A 40% aqueous solution of formaldehyde is called formalin. Transition elements have the general electronic configuration ns 1-2 (n-1)d 1-10. An ideal solution follows Raoult's law, with ΔH mix = 0 and ΔV mix = 0. The transition metal ion with the highest magnetic moment has the electronic configuration d5. A semipermeable membrane allows only solvent particles to pass through.

Osmosis and Grignard Reagents [20:57]

The movement of solvent molecules through a semipermeable membrane is called osmosis. Grignard reagent (RMgX) is formed by reacting Mg with alkyl halide (RX). Seawater is desalinated using reverse osmosis. 1°, 2°, and 3° alcohols can be distinguished using oxidation, Lucas reagent (anhydrous ZnCl2 + HCl), and Victor Meyer's test. Molten potassium chloride can conduct electricity. The carbon atom in a carbonyl group has sp2 hybridization.

Faraday's Laws and Reaction Types [24:49]

Faraday's first law is m = zc, where m is mass, z is electrochemical equivalent, and c is charge. The reduction of acid chlorides to aldehydes using palladium is called the Rosenmund reaction. Ziegler-Natta catalyst is triethylaluminum and titanium tetrachloride, used to make polythene. One Faraday is the charge on one mole of electrons, approximately 96,500 Coulombs. If a DNA strand is ATT CTT TGA, its complementary strand is TAA GAA ACT.

Pharmaceuticals and Polymers [28:38]

Valium is used as a tranquilizer. Methylamine reacts with nitrous acid to produce nitrogen gas. Natural rubber is made of isoprene. Sulphuric acid is used in lead storage batteries. Oxidation occurs at the anode in an electrochemical cell. SN1 reactions occur in two steps, while SN2 reactions occur in one step. D orbitals have a double dumbbell shape.

Aldehydes, Ketones, and Antibiotics [31:24]

Fehling's solution distinguishes between aldehydes and ketones. Chloramphenicol is a broad-spectrum antibiotic. The body does not produce vitamins. Uracil is not present in DNA. Aldehydes and ketones share the general formula CnH2nO. Guanine is a nitrogenous base. Carbohydrates are stored as glycogen in the human body. P in PCl3 has sp3 hybridization.

Reaction Orders and Vulcanization [33:55]

Reaction orders can be integers, fractions, or zero. Heating rubber with sulphur is called vulcanization. Pine oil is used in froth flotation. Morphine is a narcotic analgesic. Terylene is a condensation polymer of ethylene glycol and terephthalic acid. A positive catalyst increases the reaction rate. Radioactive decay is a first-order reaction. In Buna-S rubber, S stands for styrene. Cinnabar is HgS. Fluorine is the strongest oxidizing agent.

Oxidation States and Crystal Structures [37:00]

The oxidation number of a metal in its elemental state is zero. The example that is not from group 13-15 is cadmium. In the fluoride structure, the coordination number of Ca+2 ion is 8. The packing percentage in a BCC cube is 68%. The molality of distilled water is 55.56. Chloroform is a trihalogen derivative.

Chemical Reactions and Naming [41:04]

Heating ethyl bromide with alcoholic caustic potash yields ethene. Allyl halide has the formula CH2=CH-CH2X. Reacting ethyl bromide with sodium metal in dry ether gives butane (Wurtz reaction). DDT is made by reacting chlorobenzene with chloral. Freon has the formula CCl2F2. Primary alcohol oxidation yields aldehyde. The functional group in alcohols is OH. Glycerol is a trihydric alcohol. Diethyl ether and methyl propyl ether are metamerism.

Reactions with Zinc and Hybridization [46:33]

Heating phenol with zinc gives benzene. The central oxygen atom in ether has sp3 hybridization. Ethanol and methanol can be distinguished using the iodoform test. Formaldehyde reacts with CH3MgBr to give alcohol. Aldehydes and ketones have the same general formula, CnH2nO. Fehling's solution distinguishes between aldehydes and ketones. Calcium acetate, when heated, produces acetone. A 40% solution of formaldehyde is called formalin.

Reactions and Reagents [49:41]

The carbonyl group has sp2 hybridization. Carboxylic acids have the functional group COOH. Oxidation of ethyl alcohol yields acetic acid. Fehling's solution cannot oxidize tertiary butanol. Heating sodium acetate with soda lime yields methane. Tollen's reagent distinguishes between formic acid and acetic acid.

Amines and Sugars [57:55]

The functional group of a primary amine is NH2. Nitrogen in amines has sp3 hybridization. Amines are derivatives of ammonia. Ethylamine reacts with nitrous acid to form ethanol. Methylamine is prepared using the Hofmann bromamide reaction. Glucose gives a silver mirror with Tollen's reagent. Fructose is the sweetest sugar. Amino acids contain both COOH and NH2 groups.

Vitamins and Polymers [1:00:51]

The body does not produce vitamins. DNA contains thymine. Fructose contains a ketone group. Water-soluble vitamins are B and C. Terylene is a synthetic fiber. Wool is a natural fiber. Natural rubber is a polymer of isoprene. Tranquilizers are used to treat mental tension. Phenol is used as an antiseptic and disinfectant. Analgesics relieve pain.

Antacids and Antiseptics [1:03:28]

Antacids are basic in nature. Morphine is a narcotic analgesic. Iodine, soap, and ethanol are antiseptics. Chloromycetin is used to treat typhoid. Artificial sweeteners include saccharin, aspartame, and sodium cyclamate. The freezing point depression is highest for Na3PO4. The unit of the rate constant for a first-order reaction is time inverse. H3PO4 has three OH groups and is tribasic.

Magnetic Properties and Ores [1:08:36]

Zn+2 is diamagnetic. Gangue is the impurity present in the ore. In NiCO4, the oxidation state of Ni is zero. Antipyretics reduce fever. Methylamine is prepared by the Hofmann bromamide reaction. Alkyl halides are converted to alcohols by substitution reactions. Caprolactam is a monomer of nylon-6. Magnesium is not a first-row transition element. Copper pyrite is CuFeS2. Osmotic pressure is not a colligative property.

Chiral Carbons and Cyclic Structures [1:12:40]

Glucose has four chiral carbons. Glycerol is a trihydric alcohol. Cyclic metaphosphoric acid has three POP bonds. Smelting uses coke to reduce metal oxides. PTFE is not a condensation polymer. In K4Fe(CN)6, Fe has d2sp3 hybridization. Zwitterions are formed by amino acids. Butene-2-ol gives 2-butene on dehydration with concentrated sulphuric acid.

Electrolytic Cells and Coordination Numbers [1:18:48]

A secondary cell is a lead storage battery. In sodium oxide, the coordination number of sodium is four. Lyophilic colloids are solvent-loving, like gum. Aluminum is the most abundant metal in the earth's crust. Fluorine is the strongest oxidizing agent. Alkanes have the general formula CnH2n+2. Magnesium is not a first-row transition element. Glass is amorphous.

Electrolysis and Avogadro's Number [1:23:13]

Electrolysis of molten sodium chloride releases sodium at the cathode. 96,500 Coulombs will liberate 31.76 grams of copper from copper sulphate solution. Gold is found in the free state in nature. HCL cannot form hydrogen bonds. Helium is obtained from monazite ore. XF4 has a square planar structure. BiI3 is the strongest Lewis acid. Mercury is a metal that is liquid at room temperature.

Green Vitriol and Hybridization [1:26:48]

Green vitriol is FeSO4.7H2O. Transition elements belong to the d-block. Sulphide ores are concentrated by froth flotation. Malachite is an ore of copper. Bauxite is the main ore of aluminum. Ethane has sp3 hybridized carbon atoms. Calcium formate gives formaldehyde on dry distillation. Avogadro's number is 6.023 x 10^23. Ethyne has two pi bonds.

Periodic Table and Isomerism [1:30:07]

Mendeleev created the modern periodic table. There is no alkaline earth metal in the given option. Orlon is the trade name for polyacrylonitrile. In Na3[Cr(C2O4)3], the coordination number of Cr is 6. Group 16 contains sulphur in addition to oxygen. Osmotic pressure is π = CRT. Chemical adsorption is irreversible. The functional group of ketones is C=O.

Basicity and Half-Life [1:33:30]

The strongest base is the 2-degree amine. The half-life of a first-order reaction is 0.693/K. Bauxite is not an ore of zinc. Diamond is crystalline. Oleum is H2S2O7. Aniline has three pi bonds. In a galvanic cell, the anode is negative. Fluorine is the strongest oxidizing agent. The active functional group in alcohol is OH.

Reaction Mechanisms and Polymers [1:36:57]

A reaction's rate depends on its active mass. Only solvent molecules pass through a semipermeable membrane. Glass is amorphous. A catalyst alters the rate of reaction. All ores are minerals. Benzene has the formula C6H6. An ideal solution follows Raoult's law. Reduction of a ketone gives a 2-degree alcohol.

Functional Groups and Tollens Reagent [1:39:43]

CONH2 is an amido group. Tollen's reagent is used to test for aldehydes. Acetic acid is found in vinegar. The general formula for aldehydes and ketones is CnH2nO. Ni(CN)42- has a tetrahedral shape. The ore is gangue. The oxidation state of Ni in NiCO4 is zero. Antipyretics reduce fever. Methylamine is prepared by the Hofmann bromamide reaction.

Alkyl Halides and Polymers [1:44:13]

Alkyl halides are converted to alcohols by substitution. Caprolactam is a monomer of nylon-6. Magnesium is not a first-row transition element. Copper pyrite is CuFeS2. Osmotic pressure is not a colligative property. Glucose has four chiral carbons. Glycerol is a trihydric alcohol.

Cyclic Structures and Smelting [1:47:49]

Cyclic metaphosphoric acid has three POP bonds. Smelting uses coke to reduce metal oxides. PTFE is not a condensation polymer. In K4Fe(CN)6, Fe has d2sp3 hybridization. Zwitterions are formed by amino acids. Butene-2-ol gives 2-butene on dehydration with concentrated sulphuric acid.

Electrolytic Cells and Coordination Numbers [1:52:08]

Electrolysis and Avogadro's Number [1:56:33]

Green Vitriol and Hybridization [2:00:08]

Periodic Table and Isomerism [2:03:27]

Basicity and Half-Life [2:06:50]

Reaction Mechanisms and Polymers [2:10:17]

Functional Groups and Tollens Reagent [2:13:03]

Alkyl Halides and Polymers [2:17:33]

Cyclic Structures and Smelting [2:21:09]

Electrolytic Cells and Coordination Numbers [2:25:28]

Electrolysis and Avogadro's Number [2:29:53]

Green Vitriol and Hybridization [2:33:28]

Periodic Table and Isomerism [2:36:47]

Basicity and Half-Life [2:40:10]

Reaction Mechanisms and Polymers [2:43:37]

Functional Groups and Tollens Reagent [2:46:23]

Alkyl Halides and Polymers [2:50:53]

Cyclic Structures and Smelting [2:54:29]

Electrolytic Cells and Coordination Numbers [2:58:48]

Electrolysis and Avogadro's Number [3:03:13]

Green Vitriol and Hybridization [3:06:48]

Periodic Table and Isomerism [3:10:07]

Basicity and Half-Life [3:13:30]

Reaction Mechanisms and Polymers [3:16:57]

Functional Groups and Tollens Reagent [3:19:43]

Alkyl Halides and Polymers [3:24:13]

Cyclic Structures and Smelting [3:27:49]

Electrolytic Cells and Coordination Numbers [3:32:08]

Electrolysis and Avogadro's Number [3:36:33]

Green Vitriol and Hybridization [3:40:08]

Periodic Table and Isomerism [3:43:27]

Basicity and Half-Life [3:46:50]

Reaction Mechanisms and Polymers [3:50:17]

Functional Groups and Tollens Reagent [3:53:03]

CONH2 is an amido group. Tollen's reagent is used to test for aldehydes. Acetic acid is found in vinegar. The general formula for aldehydes and ketones is CnH2nO. Ni(

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Date: 1/7/2026 Source: www.youtube.com