List of top Chemistry Questions

According to the law of triads, the properties of the middle element were in between those of the other two elements. This law was proposed by

The series of spectral lines obtained in the ultraviolet region of hydrogen atomic spectrum constitute

The molarity of an aqueous solution containing 0.4g of NaOH (molar mass=40g/mol) in 250mL of a solution is

Which transition element among the following shows the highest number of oxidation states?

For a 1st order change R \(\rightarrow\) P, the concentration of Reactant R changes from 0.1 M to 0.025 M in 40 minutes. The rate of reaction when the concentration of R is 0.01 M is________.

Given below are the half-cell reactions:
Mn\(^{2+}\) + 2e\(^-\) \(\rightarrow\) Mn (E\(^\circ\) = -1.18 V)
Mn\(^{3+}\) + e\(^-\) \(\rightarrow\) Mn\(^{2+}\) (E\(^\circ\) = +1.51 V)
The E\(^\circ\)\(_{cell}\) for 3 Mn\(^{2+}\) \(\rightarrow\) Mn + 2Mn\(^{3+}\) will be \rule{2cm{0.1mm}}

Match List I with List II and select the correct options

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Match List - I with List – II and select the correct option (Based on mole concept):

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Match the reagents in List - I with products obtained from their carbonyl compounds in List - II.

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Which reagent is used in the Stephen reaction to reduce nitriles to imines?

What are the monomers used to synthesize Bakelite?

What is the product formed when chlorobenzene undergoes nitration with concentrated $HNO_3$ and $H_2SO_4$?

Lucas reagent, used to distinguish between primary, secondary, and tertiary alcohols, is a mixture of:

The number of atoms per unit cell in a Body-Centered Cubic (BCC) structure is:

Which of the following is the monomer of the polymer Nylon 6?

Which of the following serves as the monomer for the synthetic polymer Nylon 6?

Match the compounds of List-I with their effects in List-II

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In S\(_N\)1 reaction, the alkyl halide that on hydrolysis produces racemic mixture is

The compound from which chlorobenzene cannot be prepared easily is

C-Cl bond in methyl chloride compared to C-Cl bond in chlorobenzene is

The compound with molecular formula C\(_{20}\)H\(_{42}\) is

The number of chain isomers possible for the hydrocarbon with molecular formula \( \text{C}_5\text{H}_{12} \) is

Statement I: Nitrogen in pyridine cannot be estimated by Kjeldahl's method
Statement II: Nitrogen in pyridine changes to ammonium sulphate when heated with conc. H\(_2\)SO\(_4\) in Kjeldahl's method.
Read the above given statements and choose the correct answer from the given options.