List of top Chemistry Questions

When \(1\ dm^3\) of \(CO_2\) gas is passed over hot coke, the volume of gaseous mixture after complete reaction at STP becomes \(1.4\ dm^3\). The composition of the gaseous mixture at STP is:
Which of the following noble gases is the most reactive and forms the maximum number of compounds?
For the reversible reaction \(\text{N}_2(\text{g}) + 3\text{H}_2(\text{g}) \rightleftharpoons 2\text{NH}_3(\text{g}) + \text{Heat}\), the forward reaction is favored by:
When phenol is treated with chloroform and aqueous sodium hydroxide, the major product formed is:
The standard electrode potentials for \(\text{Zn}^{2+}/\text{Zn}\), \(\text{Ni}^{2+}/\text{Ni}\), and \(\text{Fe}^{2+}/\text{Fe}\) are \(-0.76\text{ V}\), \(-0.23\text{ V}\), and \(-0.44\text{ V}\) respectively. Which of the following reactions is spontaneous?
According to VSEPR theory, which of the following species has a see-saw shape?
On hydrolysis, which of the following carbohydrates gives only β-glucose ?
Consider the following compounds : Chlorobenzene (I), 2,4,6-trinitrochlorobenzene (II), 2,4-dinitrochlorobenzene (III), 4-nitrochlorobenzene (IV). The correct order of increasing ease of nucleophilic substitution reactions of these compounds is :
The mole fraction of a solute in 2.0 molal aqueous solution is :
Which of the following transition metals shows +1 and +2 oxidation states ?
The correct order of decreasing basic strength in aqueous solution of the following is :
On electrolysis of very dilute aqueous solution of NaCl using platinum electrodes :
Which reagent is used to distinguish between primary, secondary and tertiary amines ?
The oxidation number of Pt in [Pt(en)2Cl2]2+ is :
Which of the following product is formed when salicylic acid is treated with (CH3CO)2O in the presence of acid ?
Which of the following statements about \(C_6H_5N_2BF_4\) are correct? I. With NaF gives \(C_6H_5F\) II. With NaNO\(_2\)/Cu gives \(C_6H_5NO_2\) III. On heating gives \(C_6H_5F\) IV. With HNO\(_3\) gives \(C_6H_5NO_2\)
Identify correct set(s) of X, Y, Z in the following reaction sequence. \[ Styrene \xrightarrow{(C_6H_5CO)_2O_2, HBr} Product \xrightarrow{(ii)X} \xrightarrow{(iii)Y} Z \]
What are C and E in the following reaction sequence?
Benzene gets converted to X in reaction (A) and Y in reaction (B). X is oxidized by ammoniacal AgNO\(_3\) but Y is not. Identify A and B.
Glycosidic linkage in maltose is present between
What are X, Y, Z in the following reactions?
Natural rubber is the addition polymer of monomer X and neoprene is the addition polymer of monomer Y. What are X and Y respectively?
The detergent used in tooth pastes is 'X' and in hair conditioners is 'Y'. What are X and Y respectively?
Rate determining step in the following reactions I and II respectively is
Match the following orders with their properties.