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questions
List of practice Questions
Identify the growth hormone in plants which causes inhibitory effect.
Maharashtra Class XII - 2025
Maharashtra Class XII
Biology
Plant Growth Regulators
Which one of the following is not a part of lac operon?
Maharashtra Class XII - 2025
Maharashtra Class XII
Biology
Molecular Biology
In absence of fertilization, corpus luteum degenerates into ____________.
Maharashtra Class XII - 2025
Maharashtra Class XII
Biology
human reproduction
Which of the following divides nasal cavity?
Maharashtra Class XII - 2025
Maharashtra Class XII
Biology
Human physiology
Write the formula to calculate EAN. Explain formation of [CO(NH\(_3\))\(_6\)]\(^{3+}\) complex ion with respect to : (i) Type of hybridisation (ii) Magnetic property
Maharashtra Class XII - 2025
Maharashtra Class XII
Chemistry
Coordination Compounds
Calculate spin only magnetic moment of M\(^{2+}\) ion. [atomic number of M = 26] Write condensed electronic configuration of Gadolinium [Z = 64].
Maharashtra Class XII - 2025
Maharashtra Class XII
Chemistry
d -and f -Block Elements
Write the reducing agents used to convert Fe\(_2\)O\(_3\) to ‘Fe’ in the reduction zone of blast furnace. Write chemical equations involved in : (i) Carbylamine reaction for ethylamine. (ii) Hoffmann Bromamide degradation for acetamide.
Maharashtra Class XII - 2025
Maharashtra Class XII
Chemistry
Transition Elements
Explain Cannizzaro’s reaction with the help of benzaldehyde. Write the reaction for the conversion of cyclohexene to adipic acid.
Maharashtra Class XII - 2025
Maharashtra Class XII
Chemistry
Organic Chemistry
Define zero order reaction. A reaction takes place in two steps : (i) NO(g) + Cl\(_2\)(g) \( \rightarrow \) NOCl\(_2\)(g) (ii) NOCl\(_2\)(g) + NO(g) \( \rightarrow \) 2NOCl(g). Write the overall reaction and identify the reaction intermediate.
Maharashtra Class XII - 2025
Maharashtra Class XII
Chemistry
Chemical Kinetics
\( \Delta \)H for formation of ethane gas is \( -84.4 \) kJ at 300 K. Calculate \( \Delta \)U for the reaction.
Maharashtra Class XII - 2025
Maharashtra Class XII
Chemistry
Thermodynamics
Mention the types of polymers formed on the basis of intermolecular forces. Write any two uses of low density polyethylene.
Maharashtra Class XII - 2025
Maharashtra Class XII
Chemistry
Polymers
An element with molar mass 27 g/mol forms a cubic unit cell with edge length 405 pm. If density of the crystal is g cm\(^{-3}\), identify the type of unit cell. Derive the equation of Raoult’s law for binary solution containing non-volatile solute.
Maharashtra Class XII - 2025
Maharashtra Class XII
Chemistry
Solid State
How many coulombs of electricity is required to produce 1g of sodium metal by reduction of sodium ion?
Maharashtra Class XII - 2025
Maharashtra Class XII
Chemistry
Electrochemistry
Write the structural formula and IUPAC name of the alcohol having molecular formula C\(_4\)H\(_{10}\)O which does not undergo oxidation under normal condition.
Maharashtra Class XII - 2025
Maharashtra Class XII
Chemistry
Organic Chemistry
Identify ‘A’ and ‘B’ in the following reaction and rewrite the complete reaction :
\[ \text{CH}_3\text{-CH=CH}_2 \xrightarrow[\text{Peroxide}]{\text{HBr}} \text{A} \xrightarrow[\text{-KBr}]{\text{alcoholic KCN}} \text{B} \]
Maharashtra Class XII - 2025
Maharashtra Class XII
Chemistry
Organic Chemistry
Write the reaction for the preparation of : (i) acetaldehyde by Rosenmund reaction. (ii) benzaldehyde by Gatterman-Koch formylation.
Maharashtra Class XII - 2025
Maharashtra Class XII
Chemistry
Organic Chemistry
Write the general electronic configuration of 3d series. Draw the structures of sulphuric acid and thiosulphuric acid.
Maharashtra Class XII - 2025
Maharashtra Class XII
Chemistry
Transition Elements
Define conjugate acid-base pair. The hydroxyl ion concentration in aqueous solution of NaOH is 2 \( \times \) 10\(^{-4}\) mol dm\(^{-3}\). Calculate pH of the solution.
Maharashtra Class XII - 2025
Maharashtra Class XII
Chemistry
Ionic equilibria in solution
What is atom economy? Explain any two applications of nanomaterials.
Maharashtra Class XII - 2025
Maharashtra Class XII
Chemistry
GREEN CHEMISTRY
What is peptide bond? How is it formed? Write the name and formula of the reagent used to convert alkylhalide to nitroalkane.
Maharashtra Class XII - 2025
Maharashtra Class XII
Chemistry
Biomolecules
Write the reactions for the action of following reagents on phenol : (i) Nitrating mixture (ii) Zinc dust What is the action of phosphorous pentachloride on ethyl methyl ether?
Maharashtra Class XII - 2025
Maharashtra Class XII
Chemistry
Organic Chemistry
Derive the relation between half life and rate constant for a first order reaction.
Maharashtra Class XII - 2025
Maharashtra Class XII
Chemistry
Chemical Kinetics
State Henry's law.
Maharashtra Class XII - 2025
Maharashtra Class XII
Chemistry
Solutions
Define: Osmotic pressure
Maharashtra Class XII - 2025
Maharashtra Class XII
Chemistry
Solutions
Write the differences between lanthanoids and actinoids.
Maharashtra Class XII - 2025
Maharashtra Class XII
Chemistry
d -and f -Block Elements
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