List of top Chemistry Questions

Decreasing order of reactivity of hydrogen halide acids in the conversion of $ ROH\to RX $ is

In the conversion of

Which of the following has the largest number of isomers?

Which of the following is an outer orbital complex?

Which of the following relation is correct? (i) $ \frac{x}{m} = $ constant (at high pressure) (ii) $ \frac{x}{m} = $ constant $ \times\, p^{1/n} $ (at intermediate pressure) (iii) $ \frac{x}{m} = $ constant $ \times \,p^n $ (at lower pressure)

Which one of the following has maximum lattice energy?

Which one of the following is heteroleptic complex?

Which of the $ d $ -orbital is used in $ sp^3d $ hybridisation?

When propionic acid is treated with aqueous $ NaHCO_3 $ , $ CO_2 $ is liberated. The $ 'C' $ of $ CO_2 $ comes from

When Friedel-Crafts alkylation of benzene is carried out with $ n $ -propyl bromide, the major product is

When $ MnO_2 $ is fused with $ KOH $ , a coloured compound is formed, the product and its colour are

Weak field ligands form high spin complexes due to (where $\Delta_{0}$ is crystal field splitting and $P$ = pairing energy)

The interaction between a polar and non-polar molecule is known as

$Ti ^{3+}$ transition metal ion is purple in colour while $Ti ^{4+}$ metal ion is colourless due to

$ KMnO_4 $ gets reduced to

In diborane $ (B_2H_6) $ there are

Hydrolysis of $ XeF_4 $ and $ XeF_6 $ with water gives

Formic acid can be distinguished from acetic acid by reacting with

Eutrophication is due to

Arrange the following $ CH_3CH_2CH_2Cl\, (I) $ , $ CH_3CH_2-CHCl-CH_3\, (II) $ , $ (CH_3)_2CHCH_2Cl \,(III) $ and $ (CH_3)_3C?Cl \,(IV) $ in order of decreasing tendency towards $ S_N2 $ reactions

Arrange the following carbocations in order of increasing stability $ [A] (CH_3)_3C\overset{+}{C}H_2 \, $ , $ [B] (CH_3)_3\overset{+}{C}\, [B] $ , $ [C] CH_3CH_3C^+H_2\, $ , $ [D] CH_3\overset{+}{C}HCH_2CH_3 \, $

Splitting of spectral lines in electric field is called

Example of electrophile is

Which of the following are isoelectronic molecules?

The following reagent is used for introducing a formyl group $ (?CHO) $ into the benzene ring