List of top Chemistry Questions

Which from following pair of elements in their respective oxidation states develops same value of calculated spin only magnetic moment ?
Identify a ligand with lowest field strength among the following.
What is the atomic number of first post actinoid element ?
What is the change in oxidation number of Pb at positive electrode of lead accumulator acting as galvanic cell ?
If standard reduction potential \((E^0)\) of \((\text{Al}_{(aq)}^{+3}|\text{Al}_{(s)})\), \((\text{Fe}_{(aq)}^{+2}|\text{Fe}_{(s)})\), \((\text{Cu}_{(aq)}^{+2}|\text{Cu}_{(s)})\) and \((\text{Ag}_{(aq)}^{+1}|\text{Ag}_{(s)})\) are \(-1\cdot 66\) V, \(-0\cdot 44\) V, \(+0\cdot 34\) V and \(+0\cdot 79\) V respectively. Which of the following reaction is non spontaneous ?
In first order reaction 20 millimole of reactant is reduced to 10 millimole in \(1\cdot 151\) minute. Find rate constant.
For the reaction \(2\text{NOBr}_{(g)}\rightarrow 2\text{NO}_{(g)}+\text{Br}_{2(g)}\) rate law is \(r = k[\text{NOBr}]^2\), if rate constant is \(1\cdot 62\text{ mol dm}^{-3}\text{ s}^{-1}\) and concentration of NOBr is \(2\times 10^{-3}\text{ mol L}^{-1}\). What is the rate of reaction ?
Identify the correct statement from following.
The graphical variation of molar conductivity \((\Lambda )\) against square root of molar concentration \((\sqrt{c})\) of certain electrolyte 'X' is linear with intercept on y axis. Identify X from following.
Calculate the molar mass of a nonvolatile solute if 6.4 g of it dissolved in 100 g water produces a relative lowering in vapour pressure of \(0\cdot 016\) at 300 K.
Calculate the cryoscopic constant of a solvent if depression in freezing point of \(0\cdot 3\) m solution of nonelectrolyte is \(0\cdot 48\) K
Which of the following dopants is used in germanium to form n-type semiconductor ?
Calculate the void volume of bcc unit cell if volume of unit cell is \(8\cdot 0\times 10^{-23}\text{ cm}^3\)
Calculate the number of atoms in 1 g metal that forms bcc crystal structure \([ρ\times a^3 = 6\cdot 6\times 10^{-22}\text{ g}]\)
Identify the 'A' in the following reaction.
\(\text{CaC}_2+\text{H}_2\text{O}\rightarrow \text{A}+\text{Ca(OH)}_2\)
Identify the product 'B' in the following reaction
\(\text{Toluene}\overset{\text{Chromyl chloride}/\text{CS}_2\,}{\rightarrow }A\overset{\text{H}_3\text{O}^+\,}{\rightarrow }B\)
Which from the following metal chlorides does not contain water of crystallisation ?
Identify colour change when NaCl solution is titrated against \(\text{AgNO}_3\) solution using fluorescein indicator.
How many chiral carbon atoms are present in 2-Iodo-3, 4, 5-trimethylhexane ?
What is the name of second lower homologue of \(\text{CH}_3(\text{CH}_2)_2\text{COOH}\) ?
The solubility of sapringly soluble salt \(\text{AB}_2\) is \(18\cdot 78\times 10^{-4}\text{ g/dm}^3\) What is its solubility product ? (Molar mass of \(\text{AB}_2 = 187\cdot 8\text{ g mol}^{-1}\))
Identify oxidation number of Sulphur respectively in \(\text{SO}_2\) and \(\text{SO}_4^{2-}\) .
What is the pH of resulting solution when \(20\text{ mL }\frac{M}{10}\text{ NaOH}\) and \(10\text{ mL }\frac{M}{10}\text{ H}_2\text{SO}_4\) are mixed together ?
Which of the following is correct relationship between solubility and solubility product for silver oxalate ?
Which of the following processes is an endothermic ?