List of top Chemistry Questions

How can these conversions be done? Give chemical equations only.
(i) Propan-2-ol from propene (ii) Benzyl alcohol from benzyl chloride (iii) Propan-1-ol from ethyl magnesium chloride (iv) 2-methyl propan-2-ol from methyl magnesium bromide (v) Picric acid from phenol
Based on the data given above, give plausible reason for the variation of conductivity and molar conductivity with concentration.
Concentration of KCl solution (mol/L)Conductivity at 298.15 K (S cm-1)Molar Conductivity at 298.15 K (S cm2 mol-1)
1.000 0.1113111.3
0.1000.0129129.0
0.0100.00141141.0
The correct IUPAC name for \( CH_2 = CHCH_2NHCH_3 \) is:
How many coulombs of electricity is required to produce 1g of sodium metal by reduction of sodium ion?
Explain optical activity, chirality, retention, inversion and racemisation in Haloalkane.
Derive the relation between half life and rate constant for a first order reaction.
What is peptide bond? How is it formed? Write the name and formula of the reagent used to convert alkylhalide to nitroalkane.
The emf of the cell \(\mathrm{Ni}_{(s)} \left| \mathrm{Ni}^{2+}(0.16 \, \mathrm{M}) \right| \mathrm{Ag}^{+}(0.002 \, \mathrm{M}) \left| \mathrm{Ag}_{(s)} \right.\) is (\(E^0_{\text{cell}} = 1.05 \, \mathrm{V}\)):
Among the following, which will have inversion of configuration on reaction with aqueous alkali and why?
(i) 1-chloropropane
(ii) 2-chloro-2-methylpropane
Sweetest sugar is:
Draw a neat and labelled diagram of a lead accumulator cell. Write the overall reactions taking place at cathode and anode during discharging of the cell.
State whether entropy change is positive or negative in the following examples : (i) Melting of ice (ii) Vaporisation of a liquid Explain ‘common ion effect’ with example.
Define a unit cell. Which colour is shown by NaCl crystal due to formation of F-centre? Why does fluorine show anomalous behaviour in ‘17 group’ 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.
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.
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
\( \Delta \)H for formation of ethane gas is \( -84.4 \) kJ at 300 K. Calculate \( \Delta \)U for the reaction.
Explain Cannizzaro’s reaction with the help of benzaldehyde. Write the reaction for the conversion of cyclohexene to adipic acid.
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.
Mention the types of polymers formed on the basis of intermolecular forces. Write any two uses of low density polyethylene.
Calculate spin only magnetic moment of M\(^{2+}\) ion. [atomic number of M = 26] Write condensed electronic configuration of Gadolinium [Z = 64].
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.
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?
Write the general electronic configuration of 3d series. Draw the structures of sulphuric acid and thiosulphuric acid.
Write the reaction for the preparation of : (i) acetaldehyde by Rosenmund reaction. (ii) benzaldehyde by Gatterman-Koch formylation.