List of top Chemistry Questions

What is the mass in grams of $0.25 \text{ mol}$ water?

Which from following is an essential amino acid?

Calculate the concentration of dissolved gas in water at $25^\circ\text{C}$ if partial pressure of gas at same temperature is 0.15 atm . $[\text{K}_\text{H} = 0.15 \text{ moldm}^{-3} \text{atm}^{-1}]$}

Calculate the total number of tetrahedral and octahedral voids formed in 0.6 mol of a compound if it forms hcp structure.

What is the number of unpaired electrons in Ti in +3 state?

Identify thermoplastic polymer from following.

The rate constant for the reaction, $2\text{N}_2\text{O}_{5(\text{g})} \longrightarrow 2\text{N}_2\text{O}_{4(\text{g})} + \text{O}_{2(\text{g})}$ is $4.98 \times 10^{-4} \text{ s}^{-1}$ . What is the order of reaction?

Which of the following is not negatively charged sol?

Which of the following set of elements is present in apatite?

Identify the geometry of $\text{TeF}_4$ molecule from the following.

What is the pH of buffer solution formed by mixing 0.01 M acetic acid and 0.05 M sodium acetate? $(\text{pK}_\text{a} = 4.7447)$

Calculate the energy associated with third orbit of $\text{He}^+$.

Which of the following solutions exhibits highest freezing point depression?

Which from following formulae is used to obtain value of $\text{E}^\circ_{\text{cell}}$ for a reaction taking place in Dry cell?

Which from following is a lanthanoid element?

Identify the type of defect from following in stainless steel.

If compressibility factor of real gas is 1.05 at STP. What is molar volume of real gas?

Which among the following is NOT benzylic halide?

Identify the product ' X ' formed in the following reaction,
$\text{Sodium ethoxide} + \text{Isopropyl chloride} \longrightarrow \text{X} + \text{Ethanol} + \text{Sodium chloride}$

Identify the product ' B ' in the following sequence of reactions.
$\text{Methylpropanoate} \xrightarrow[\text{dil. NaOH}]{\Delta} \text{A} \xrightarrow[\text{Conc. HCl}]{\text{H}^+} \text{B}$

The solubility of AgBr is $7.1 \times 10^{-7} \text{ moldm}^{-3}$. Calculate its solubility product at the same temperature.

Identify the reagent involved in Sandmeyer reaction.

Calculate the enthalpy of vaporisation of ethanol if 11.5 g of ethanol is completely vaporised by supplying 11.8 kJ of heat.

Identify the product ' Z ' in the following series of reactions. $\text{Ethanol} \xrightarrow[\Delta]{\text{SOCl}_2} \text{X} \xrightarrow[\text{Dry ether}]{\text{Mg}} \text{Y} \xrightarrow{\text{NH}_3} \text{Z}$

Identify the monomers use to prepare glyptal.