List of top Chemistry Questions

On treating 100 mL of 0.1 M aqueous solution of the complex CrCl₃.6H₂O with excess of AgNO₃, 2.86 g of AgCl was obtained. The complex is:

For the coagulation of positively charged hydrated ferric-oxide sol, the flocculating power of the ions is in the order:

PCC is:

The complex compounds [Co(NH₃)₅SO₄]Br and [Co(NH₃)₅Br]SO₄ are:

The transition element (≈5%) present with lanthanoid metal in Misch metal is:

Identify the incorrect statement from the following:

Which of the following statements related to lanthanoids is incorrect?

From the diagram

\( \Delta H \) for the reaction C → A is:

Which of the following statements are true about [CoF₆]³⁻ ion?
I) The complex has octahedral geometry.
II) Coordination number of Co is 3 and oxidation state is +6.
(III) The complex is sp³d² hybridised.
(IV) It is a high spin complex.

Identify the incorrect statement:

Which one of the following nitrates will decompose to give NO₂ on heating?

The correct decreasing order of boiling points of hydrogen halides is:

In the analysis of III group basic radicals of salts, the purpose of adding NH₄Cl (solid) to NH₄OH is:

0.48 g of an organic compound on complete combustion produced 0.22 g of CO₂. The percentage of C in the given organic compound is:

For the reaction PCl5​→PCl3​+Cl2​, the rate and rate constant are 1.02×10−4mol L−1s−1 and 3.4×10−5s−1, respectively, at a given instant. The molar concentration of PCl5​ at that instant is:

Identify the wrong relation for real gases:

For which one of the following mixtures is composition uniform throughout?

The energy associated with the first orbit of He+ is:

In the following scheme of reaction.

X, Y and Z respectively are:

2-Methylpropane can be prepared by Wurtz reaction. The haloalkanes taken along with metallic sodium and dry ether are:

In the given sequence of reactions, identify ‘P’, ‘Q’ and ‘S’ respectively:

A haloalkane undergoes $S_{N^2}$ or $S_{N^1}$ reaction depending on:

When a tertiary alcohol ($C_4​H_{10}​O$) reacts with 20% $H_3​PO_4$​ at 358 K, it gives a compound ($C_4​H_8​$) as the major product. The IUPAC name of this compound is:

In the reaction: \(\text{Aniline} \xrightarrow{\text{NaNO}_2/\text{dil. HCl}} P \xrightarrow{\text{Phenol/NaOH}} Q\)