List of top Chemistry Questions

Identify the substrate ' X ' in the following reaction. $\text{X} + \underset{(\text{air})}{\text{O}_2} \xrightarrow[\text{ii) dil HCl } \Delta]{\text{i) Co-naphenate } 423 \text{ K}} \text{Phenol} + \text{Acetone}$

Which among the following is NOT dicarboxylic acid?

Which metal in following compounds is not present in fractional oxidation state?

Which from following tests confirms presence of aldehydic group in glucose?

Calculate the constant external pressure required to expand 2 moles of an ideal gas from volume $15\text{dm}^3$ to $20\text{dm}^3$ if amount of work done is -600 J .

Which from following process involves zero work done?

Identify false statement from the following about fluorine.

Identify the ligands present in cisplatin.

Standard potential ($\text{E}^\circ$) of $\text{Zn}^{+2}_{(\text{aq})} + 2\text{e}^- \longrightarrow \text{Zn}_{(\text{s})}$ is -0.76 V . What is standard potential of reaction $2\text{Zn}_{(\text{s})} \longrightarrow 2\text{Zn}^{+2}_{(\text{aq})} + 4\text{e}^-$?

Which of the following pair of compounds on heating gives butanenitrile?

The reaction of propane with bromine in presence of UV light predominantly forms

The rate constant for a first order reaction is $0.58 \text{ s}^{-1}$ at $300 \text{ K}$ and $0.026 \text{ s}^{-1}$ at $290 \text{ K}$ . What is the energy of activation? $\left(\text{R} = 8.314 \text{ J K}^{-1} \text{ mol}^{-1}\right)$}

Which of the following species acts as reducing agent during working of hydrogen-oxygen fuel cell?

Which from following reagents is used in Gatterman-Koch formylation of arene?

Solubility of $\text{Ca}_3(\text{PO}_4)_2$ is ' S ' $\text{moldm}^{-3}$. Find solubility product.

Which from following functional groups has highest priority order for naming the poly functional compound?

Which of the following alkenes is most easily formed by dehydrohalogenation of alkyl halides?

Which among the following salts is NOT hydrolysed in water?

In a chemical reaction, sum of formula weight of all reactants is 274 u and atom economy is 50%, calculate formula weight of desired product?

Select the correct IUPAC name of pyrogallol.

Calculate the longest wavelength in hydrogen emission spectrum of Lyman series.
\([\text{R}_{\text{H}} = 109677\text{ cm}^{-1}]\)

Identify the correct order of thermal stability of hydrides of 16 group elements from the following.

Calculate the number of atoms present in 1.58 g metal if it forms bcc structure.
\([\rho \times \text{a}^3 = 1.58 \times 10^{-22}\text{ g}]\)

How long should aqueous \(\text{NaCl}\) be electrolysed by passing 100 ampere current, so that 0.5 mol chlorine is released at anode?

Which from following cations develops lowest value of spin only magnetic moment?