Bihar Board Class 12 Chemistry Question Paper PDF with Solutions is available for download. The Bihar School Examination Board (BSEB) conducted the Class 12 examination for a total duration of 3 hours 15 minutes, and the Bihar Board Class 12 question paper was of a total of 100 marks.
Bihar Board Class 12 Chemistry 2025 Question Paper with Solutions Set D
| Bihar Board Class 12 Chemistry 2025 Question Paper Set D | Download PDF | Check Solutions |
Which of the following adsorptions forms multimolecular layer?
Impurities present in an ore are called
The process of smelting involves reduction of metal oxide with
Lutetium (Lu) is
Elements of which atomic numbers belong to 3d transition series?
The process of purification of metal represented by the following equation is called
\[ Ti + I_2 \xrightarrow{773\,K} TiI_4 \xrightarrow{1675\,K} Ti + I_2 \]
Which of the following metals is not obtained by electrolysis?
Which of the following oxides is paramagnetic?
Which of the following ions is diamagnetic?
The electronic configuration of copper (Z = 29) is
Which of the following is the electronic configuration of Lanthanide elements?
Which of the following compounds can be coloured?
The oxidation state of Fe in K\(_4\)[Fe(CN)\(_6\)] is
The effective atomic number (E.A.N.) of cobalt in the complex ion [Co(en)\(_2\)Cl\(_2\)]\(^+\) is
Which of the following is the structural formula of hypophosphorous acid?
Ammonia can be dried by
Which among the following is the strongest base?
The hybridization of S in SO\(_3\) is
The maximum covalency of nitrogen is
The number of unpaired electrons in one molecule of liquid oxygen is
The most abundant noble gas in atmosphere is
The electromotive force of the following cell is
Zn\(|\)Zn\(^{2+}\) (1M) \(||\) Fe\(^{2+}\) (1M) \(|\)Fe
E\(^0\) Zn\(^{2+}\)|Zn = -0.76 V, E\(^0\) Fe\(^{2+}\)|Fe = -0.44 V
The unit of specific conductance is
Which among the following aqueous solutions has the highest boiling point?
Which of the following is not a colligative property?
An aqueous solution of which of the following compounds shows abnormal osmotic pressure?
The solution which shows positive or negative deviation from Raoult's law is called
Isotonic solutions have equal
The structure of complex ion [Ni(CN)\(_4\)]\(^{2-}\) is
The IUPAC name of complex compound [Co(NH\(_3\))\(_6\)]Cl\(_3\) is
Which of the following cannot show linkage isomerism?
Reaction of primary amine with chloroform in the presence of alcoholic KOH is called
Which of the following is chloral?
Which of the following has zero dipole moment?
The IUPAC name of CH\(_3\)-CH-CH\(_3\)-CH\(_2\)Cl is
Which of the following would give Aldol condensation reaction?
Vinegar contains
The IUPAC name of CH\(_3\)COOC\(_2\)H\(_5\) is
The general formula of an amine is
Which of the following is Hinsberg reagent?
The source of fats and oils is
The specific rate constant of a first order reaction depends upon
The hydrolysis of ethyl acetate in the presence of dil. NaOH is a reaction of which order?
The temperature coefficient of most of the reactions lies between
The expression of rate for a chemical reaction is, rate = k[A][B]^n; the order of reaction is
Which of the following electrolytes is the least effective in causing coagulation of colloidal solution of ferric hydroxide?
Which of the following is an emulsifier ?
Which of the following catalysts is used in Haber’s process for the manufacture of ammonia ?
Water soluble vitamin is
The purine base present in RNA is
The product of addition polymerization is
Which one of the following is a thermosetting plastic?
The medicines which lower fever are called
Which of the following is a disaccharide?
Alkali salt of palmitic acid is known as
The number of atoms present in body-centred cubic unit cell is
Which of the following is not a crystalline solid?
How many kinds of Bravais lattice are possible in a crystal?
The percentage of free space in a body-centred cubic unit cell is
In electrolysis, oxidation takes place at:
The quantity of electricity required to liberate 32 g of oxygen is:
Rust is:
Chloroform is:
General group(s) for alcohols is/are:
The number of isomeric alcohols of molecular formula \( C_4H_{10}O \) is:
Methyl alcohol on oxidation with acidified \( K_2Cr_2O_7 \) gives:
Diethyl ether finds its use in medicine as:
The general formula of carbonyl compound is:
At room temperature, formaldehyde is
Write the names of the catalysts used in contact process and Ostwald process.
Write the formula of Tetra-aminoaquachlorido-cobalt (III) chloride.
What is metamerism?
What are chiral and achiral compounds?
What are essential amino acids?
"(\(O_3\))behaves as a strong oxidising agent." Explain.
What is slag?
What are macromolecules?
Write Faraday’s 2nd law of Electrolysis.
Write the IUPAC name of complex compound \( K_3[Cr(C_2O_4)_3] \).
Why is ethyl alcohol not dried by anhydrous CaCl2?
Write Arrhenius equation.
How would you prepare ethane from methyl iodide?
How would you prepare iodoform from acetylene?
Why is PCl\(_5\) a known compound, but NCl\(_3\) is not?
Why are alcohols more soluble in water than alkanes of the same molecular weight?
What do you understand by elevation of boiling point?
What happens when n-butyl chloride reacts with alcoholic KOH?
Distinguish between Alcohol and Phenol.
Why is nitrogen molecule less reactive?
Explain Raoult’s law. How would you distinguish between ideal and non-ideal solutions on its basis?
What do you understand by concentration of an ore? Discuss the different methods of concentration of ores.
Differentiate between Methanoic acid and Ethanoic acid.
Write IUPAC names of the following compounds:
What are carbohydrates? How are they classified?
Differentiate between DNA and RNA.
What are nucleic acids?
Differentiate between Electrochemical cell and Electrolytic cell.
What are the importances of salt bridge in an electrochemical cell?
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