List of top Chemistry Questions

The group reagent NH\(_4\)Cl (s) and aqueous NH\(_3\), will precipitate which of the following ion
Catalysts are used to increase the rate of a chemical reaction. Because it
According to the Heisenberg's Uncertainty principle, the value of \(\Delta v \cdot \Delta x\) for an object whose mass is \(10^{-6}\) kg is

Given below are the atomic masses of the elements: 

Which of the following doesn't form triad? 
 

Oxidation of Toluene with chromyl chloride followed by hydrolysis gives Benzaldehyde. This reaction is known as
If \(N_2\) gas is bubbled through water at 293 K, how many moles of \(N_2\) gas would dissolve in 1 litre of water? Assume that \(N_2\) exerts a partial pressure of 0.987 bar. [Given \(K_H\) for \(N_2\) at 293 K is 76.48 K bar]
In the reaction between hydrogen sulphide and acidified permanganate solution,

Match List-I with List-II and choose the correct answer from the options given below. 

In the following pairs, the one in which both transition metal ions are colourless is
Statement-I: Reduction of ester by DIBAL-H followed by hydrolysis gives aldehyde.
Statement-II: Oxidation of benzyl alcohol with aqueous KMnO₄ leads to the formation of benzaldehyde.
Among the above statements, identify the correct statement.

Match List-I with List-II and select the correct option: 

Which of the following methods of expressing concentration are unitless?
180 g of glucose, \(C_6H_{12}O_6\), is dissolved in 1 kg of water in a vessel. The temperature at which water boils at 1.013 bar is ______ (given, \(K_b\) for water is 0.52 K kg mol\(^{-1}\)). Boiling point for pure water is 373.15 K
Which formula and its name combination is incorrect?

The major product formed when 1 - Bromo-3-Chlorocyclobutane reacts with metallic sodium in dry ether is 

In the complex ion  Fe(C2O4)3  the Co-ordination number of Fe is

A member of the Lanthanoid series which is well known to exhibit +4 oxidation state is
In the titration of potassium permanganate (KMnO\(_4\)) against Ferrous ammonium sulphate (FAS) solution, dilute sulphuric acid but not nitric acid is used to maintain acidic medium, because

Match the following with their pKa values 

The change in hybridisation (if any) of the 'Al' atom in the following reaction is
AlCl3 + Cl- → AlCl4-
Ethyl alcohol is heated with concentrated sulphuric acid at 413 K (140°C). The major product formed is

Match List-I with List-II for the following reaction pattern: \[ \text{Glucose} \quad \text{Reagent} \quad \rightarrow \quad \text{Product} \quad \rightarrow \quad \text{Structural prediction} \] 

 

Among the following 0.1 m aqueous solutions, which one will exhibit the lowest boiling point elevation, assuming complete ionization of the compounds in solution?
In the preparation of sodium fusion extract, the purpose of fusing organic compound with a piece of sodium metal is to
Which of the following statements are true about \( [NiCl_4]^{2-} \)?
(a) The complex has tetrahedral geometry.
(b) Co-ordination number of Ni is 2 and oxidation state is +4.
(c) The complex is sp\(^3\) hybridised.
(d) It is a high spin complex.
(e) The complex is paramagnetic.