List of top Chemistry Questions

The nature of the bond in diamond is
Differentiating electron in inner transition elements enters the ......... orbital.
What is (are) number $(s)$ of unpaired electrons in the square planar $[Pt(CN)_4]^{2-}$ ion?
Which of the following can give a Grignard reagent when reacted with magnesium in dry ether?
When copper reacts with hot and conc. $ H_2SO_4, $ gives
The chemical name of anisole is
An aqueous solution of 6.3 g of oxalic acid dihydrate is made upto 250 mL. The volume of $ \text{0}\text{.1}\,\text{N}\,\text{NaOH} $ required to completely neutralize 10 mL of this solution is
If $ X $ is the total number of collisions which a gasmolecule register with others per unit time under particular conditions, then the collision frequency of the gas containing N molecules per unit volume is
The wavelength of the radiation emitted, when in a hydrogen atom electron falls from infinity to stationary state one, would be (Rydberg constant $ =1.097\times {{10}^{7}}\,{{m}^{-1}} $ )
Which of the following complex has zero magnetic moment (spin only)?
Which of the following is hexadentate ligand?
AgCl dissolves in a solution of NH₃, but not in water because
A coordinate bond is a dative covalent bond. Which of the below is true?
Give the IUPAC name for \[ \text{H}_3\text{C} - \text{CH}_2 - \text{C} - \text{CH}_2 - \text{C} - \text{OCH}_3 \]
In which of the below reactions do we find \( \alpha, \beta \)-unsaturated carbonyl compounds undergoing a ring closure reaction with conjugated dienes?
Aldol condensation is given by
Phenol is less acidic than
The epoxide ring consists of which of the following?
In the Grignard reaction, which metal forms an organometallic bond?
For strong electrolytes the plot of molar conductance vs \( \sqrt{C} \) is
If the molar conductance values of \( \text{Ca}^{2+} \) and \( \text{Cl}^- \) at infinite dilution are respectively \( 18.88 \times 10^{-4} \, \text{m}^2 \, \text{mol}^{-1} \) and \( 77.33 \times 10^{-4} \, \text{m}^2 \, \text{mol}^{-1} \), then that of \( \text{CaCl}_2 \) is (in \( \text{m}^2 \, \text{mol}^{-1} \))
The standard reduction potentials at 298K for the following half reactions are given: \[ \text{Zn}^{2+}(aq) + 2e^- \rightarrow \text{Zn}(s) \quad E_0 = -0.762 \, \text{V} \] \[ \text{Cr}^{3+}(aq) + 3e^- \rightarrow \text{Cr}(s) \quad E_0 = -0.740 \, \text{V} \] \[ 2H^+(aq) + 2e^- \rightarrow H_2(g) \quad E_0 = 0.00 \, \text{V} \] \[ \text{Fe}^{3+}(aq) + e^- \rightarrow \text{Fe}^{2+}(aq) \quad E_0 = +0.762 \, \text{V} \] The strongest reducing agent is
Given the equilibrium system: \[ \text{NH₄Cl(s)} \rightleftharpoons \text{NH₃(aq)} + \text{Cl⁻(aq)} \quad \Delta H = +3.5 \, \text{Kcal/mol} \] What change will shift the equilibrium to the right?
Equivalent amounts of H₂ and I₂ are heated in a closed vessel till equilibrium is obtained. If 80% of the hydrogen can be converted to HI, the \( K_c \) at this temperature is
For the reaction \( H_2(g) + I_2(g) \rightleftharpoons 2HI(g) \), the equilibrium constant \( K_p \) changes with