Shared by a Veda learner · Generated with Veda AI
This exam covers key concepts in chemistry, including reactions, properties of elements, and mechanisms. Focus on understanding reaction types, properties of compounds, and the applications of various chemical principles…
Full explanation, worked examples & memory tricks in the app
Every question in the paper gets a full exam-length answer in the app — organised by marks, the way a topper writes it.
Using Valence Bond Theory [VBT], describe the hybridization, geometry, and magnetic properties of the [CoF6]³⁻ ion. [Given: Atomic number of Cobalt = 27]
The hybridization is sp³d², geometry is octahedral, and it is paramagnetic.
The full exam-length answer is in the app.
Heteroleptic complexes with coordination number 6 show geometrical isomerism. A complex [MA3B3] shows geometrical isomerism. If the central metal ion M is in +3 oxidation state, mention its denticity and draw the structures of the two geometrical isomers of the complex.
Denticity is 6; the two isomers are fac and mer.
The full exam-length answer is in the app.
What is lanthanoid contraction? State its two consequences.
Lanthanoid contraction is the gradual decrease in size of lanthanide ions; it leads to similar ionic radii and increased ionization energy.
The full exam-length answer is in the app.
How many square pyramidal units are present in decacarbonyldimanganese (0)? Write its molecular formula and structural formula.
There are 10 square pyramidal units; the molecular formula is Mn(CO)10.
The full exam-length answer is in the app.
Complete the following equations. (a) ______ + 8 Na2CO3 + 7 O2 → 8 Na2CrO4 + 2 Fe2O3 + 8 CO2 (b) MnO2 (Fused with KOH, Oxidised with air) → K2MnO4 + O2 + ______ (c) 2 KMnO4 (513K) → ______
a) Cr, b) MnO2, c) K2MnO4.
The full exam-length answer is in the app.
(a) Write the Haworth structure of maltose. Does it show reducing properties? Why? (b) What are fibrous proteins? Name the protein present in hair. (3+2)
Maltose shows reducing properties due to free aldehyde; keratin is in hair.
The full exam-length answer is in the app.
(a) Write the three steps of the acid-catalyzed dehydration mechanism to obtain ethoxyethane from ethanol at 413K. (b) Explain Kolbe's reaction with a chemical equation. (3+2)
Steps include protonation, elimination, and deprotonation; Kolbe's reaction forms alkenes.
The full exam-length answer is in the app.
(a) Alkyl iodides are formed when alkyl chlorides react with sodium iodide in dry acetone. (i) Name this reaction. (ii) Write the general equation. (iii) State the role of dry acetone. (3+2) (b) What is racemic modification? Give a reason why 'they do not possess optical activity'.
This is the Finkelstein reaction; acetone dissolves sodium iodide; racemic mixtures lack optical activity due to symmetry.
The full exam-length answer is in the app.
(a) Which class of amines undergoes carbylamine reaction (isocyanide test)? Explain this reaction with a general chemical equation. (b) Identify the compounds 'X' and 'Y' used in the following conversion. CH3-NH2 (NaNO2 + 2HCl, 273-278K) → 'X' → 'Y' → C6H5-I + KCl + N2 (3+2)
Primary amines undergo this reaction; X is diazonium salt, Y is aryl iodide.
The full exam-length answer is in the app.
(a) Write the names of the following reactions. (i) Benzene with Cl (H2, Pd-BaSO4) → Benzaldehyde (ii) R-CO-Cl (Anhyd. AlCl3) → R-CO-R (iii) R-CO-R (Zn-Hg, HCl) → R-CH2-R + H2O (3+2) (b) Which of methanol and ethanol undergoes Cannizzaro reaction? Give a reason.
Reactions are chlorination, Friedel-Crafts acylation, and Clemmensen reduction; methanol does not undergo Cannizzaro reaction.
The full exam-length answer is in the app.
Compound 'A' with formula C7H8, when heated with alkaline KMnO4 and then acidified, gives compound 'B' with formula C7H6O2. Compound 'B' turns blue litmus red. The sodium salt of compound 'B', when heated with reagent 'X', gives a hydrocarbon 'C' with molar mass 78 gmol⁻¹. (a) Write the structural formulas of compounds 'A', 'B', and 'C'. (b) Identify 'X' and explain its role in the reaction. (3+2)
A is toluene, B is benzoic acid, C is benzene; X is soda lime for decarboxylation.
The full exam-length answer is in the app.
For the following reaction in a cell, 2Fe³⁺(aq) + 2I⁻(aq) → 2Fe²⁺(aq) + I2(s); if E°cell = 0.236 V at 298K, calculate log Kc (Kc = equilibrium constant) for this cell.
log Kc = nE°cell/0.0592.
The full exam-length answer is in the app.
The rate constant for a first-order reaction is 2x10⁻² s⁻¹ at 600 K and its activation energy is 209.8 kJmol⁻¹. Calculate the rate constant for this reaction at 700 K. [Given: R=8.314 JK⁻¹mol⁻¹]
Use Arrhenius equation to find k at 700 K.
The full exam-length answer is in the app.
The Henry's law constant for methane in benzene at 298 K is 4.27×10⁵ mm Hg. Calculate the mole fraction of methane in benzene at 760 mm Hg pressure at 298 K.
Use Henry's law to find mole fraction.
The full exam-length answer is in the app.
Using the given data, calculate the limiting molar conductivity of Cl⁻ ions. [Given: Λ°m for Ca²⁺ = 119.0 Scm²mol⁻¹; Λ°m for CaCl2 = 271.6 Scm²mol⁻¹].
Λ°m(Cl⁻) = Λ°m(CaCl2) - Λ°m(Ca²⁺).
The full exam-length answer is in the app.
At 37°C, 0.925 g of a polymer with molar mass 1,85,000 is dissolved in 500 mL of water. Calculate the osmotic pressure developed in the solution in Pascals. [Given: R=8.314×10³ Pa L K⁻¹ mol⁻¹]
Use π = nRT/V to calculate osmotic pressure.
The full exam-length answer is in the app.
Analyze the given graph plotted between reactant concentration (molL⁻¹) v/s time (minutes). Calculate the average rate of reaction in minutes and seconds.
Average rate = (Concentration change)/(Time interval).
The full exam-length answer is in the app.
What is Lucas reagent? Which type of alcohols react immediately with this reagent?
Lucas reagent is a solution of zinc chloride in hydrochloric acid; it reacts with tertiary alcohols.
The full exam-length answer is in the app.
Write the SN2 reaction mechanism for the conversion of chloromethane to methanol.
The SN2 mechanism involves the nucleophile attacking the carbon and displacing the leaving group.
The full exam-length answer is in the app.
For the reaction: H2(g) + I2(g) → 2HI(g); draw a potential energy diagram showing the role of the activated complex and the reaction pathway.
The diagram shows the energy barrier and the transition state.
The full exam-length answer is in the app.
What is the hormone released in response to a rapid increase in blood glucose levels to lower glucose? State the number of amino acids present in this hormone.
Insulin is the hormone; it has 51 amino acids.
The full exam-length answer is in the app.
What are transition elements? Give one example.
Transition elements are d-block elements; an example is Iron.
The full exam-length answer is in the app.
State three factors that influence the rate of a chemical reaction.
Concentration, temperature, and catalyst presence.
The full exam-length answer is in the app.
In medicine and pharmacy, what concentration definition is commonly used? Define this concentration and write its mathematical equation.
Molarity is commonly used; M = moles of solute/volume of solution in liters.
The full exam-length answer is in the app.
Based on the magnitude of electrical conductivity of materials, classify the three types of materials.
Conductors, insulators, and semiconductors.
The full exam-length answer is in the app.
10% by mass of glucose in water means:
10 g glucose dissolved in 100 g water.
The full exam-length answer is in the app.
Which of the following elements is liquid at room temperature?
Mercury
The full exam-length answer is in the app.
The reagent used in Sandmeyer's reaction is:
Cu and HCl
The full exam-length answer is in the app.
The main natural source of acetic acid is:
Vinegar
The full exam-length answer is in the app.
The reaction of aniline which gives Zwitter ion as the main product is:
Sulphonation
The full exam-length answer is in the app.
The method to separate the products obtained when phenol reacts with dilute (concentrated) nitric acid at low temperature is:
Steam distillation
The full exam-length answer is in the app.
Which ligand forms more stable coordination compounds?
C2O4
The full exam-length answer is in the app.
Which of the following groups increases the basic strength of aniline when present in the para position?
-NH2
The full exam-length answer is in the app.
Which of the following acids is a vitamin?
Ascorbic acid
The full exam-length answer is in the app.
The main reagent useful for separating and purifying aldehydes from ketones is:
Sodium hydrogen sulfite
The full exam-length answer is in the app.
Statement I: When two liquids are mixed, if the solution heats up, it indicates that it shows a negative deviation from Raoult's law. Statement II: Solutions showing negative deviation have a decrease in volume.
Both Statement I and Statement II are correct.
The full exam-length answer is in the app.
Match the following transition elements/compounds with the methods in which they participate as catalysts: Transition elements/compounds | Name of the method (i) TiCl4 + Al(CH3)3 | (A) Wacker process (ii) PdCl2 | (B) Contact process (iii) Ni | (C) Polyethylene production (iv) V2O5 | (D) Hydrogenation of fats
i-C, ii-A, iii-D, iv-B
The full exam-length answer is in the app.
The products obtained when cumene hydroperoxide undergoes hydrolysis with dilute (concentrated) acid are:
Phenol and acetone
The full exam-length answer is in the app.
In which of the following cells is used for power supply in Apollo space program?
H2-O2 fuel cell
The full exam-length answer is in the app.
The following results were obtained during the kinetic study of the reaction A(aq) + 2B(aq) → C(aq). Determine the correct option for the order of this reaction.
Rate=K[A]¹[B]²
The full exam-length answer is in the app.
The most common halogen compound used as an anesthetic in surgery is __________.
Chloroform
The full exam-length answer is in the app.
Nucleic acids are long chain polymers of __________.
Nucleotide
The full exam-length answer is in the app.
The van't Hoff factor for KCl solution, assuming complete dissociation, is __________.
Two
The full exam-length answer is in the app.
The number of hydroxyl groups in glycerol is __________.
Three
The full exam-length answer is in the app.
An example of a polydentate ligand is __________.
EDTA
The full exam-length answer is in the app.
The full Veda Bites deck, complete notes, spaced-repetition flashcards, leveled MCQs, tests and games for this kit — plus Daily Facts and the Arena, every day.