List of top Chemistry Questions

1-Chloro-4-nitrobenzene, 1-Chloro-2,4-dinitrobenzene and 1-Chloro-2,4,6-trinitrobenzene are transformed to corresponding phenols with the reagents X, Y, Z respectively. What are X, Y, Z?
X and Y in the following reactions are:
Socl2,cooh
In the reaction, if X is the reagent and Y is the product, which of the following is not feasible?
X is the reagent and Y is the product,
Ranitidine belongs to which of the following class of drugs?
Among V, Cr, Zn, Fe, the metal having lowest enthalpy of atomization is:
Which of the following polymer is used in the preparation of gaskets?
Select the correct order of radii of the given ions:
The source of vitamin, whose deficiency causes scurvy is:
The molality of solution, when 18 g of glucose is added to 18 g of H2O is:
In which of the following, the molecules are arranged in the increasing order of their bond angles?
The greater the valence of the flocculating ion added, the greater is its power to cause precipitation of a colloid. This rule is:
Observe the following Ellingham diagram, and identify the incorrect statement regarding it:
Above 1673K, Al can reduce MgO to Mg
Which of the following is not correctly matched for enzymatic reactions?
Which of the following is not correct?
6 g of a non-volatile solute (x) is dissolved in 100 g of water. The relative lowering of vapour pressure of resultant solution is 0.006. What is the molar mass (in g mol\textsuperscript{–1}) of x?
Statement I: Boron does not exhibit allotropy
Statement II: Boron is extremely hard and black coloured solid
Arrange the following free radicals in the correct order of their stability:
The given unit cell belongs to the type:
The given unit cell belongs
The decreasing order of priority for the following functional groups in the IUPAC Nomenclature is: –SO\textsubscript{3}H, –CN, –COOH, –OH, –CHO
Which of the following statement(s) is/are correct?
If the enthalpy and entropy change for a reaction at 298 K are -145 kJ mol$^{-1}$ and -650 J K$^{-1}$ mol$^{-1}$ respectively, which one of the following statements is correct?
11.0 L of an ideal gas at constant external pressure of 5 atm is compressed isothermally to a final volume of one liter. The heat absorbed and work done respectively, during this compression (in L atm) are
One mole H\textsubscript{2O(g) and one mole CO(g) are taken in 1L flask and heated to 725K. At equilibrium, 40\% (by mass) of water reacted with CO(g) as follows:} \[ \text{H}_2\text{O(g)} + \text{CO(g)} \rightleftharpoons \text{H}_2\text{(g)} + \text{CO}_2\text{(g)} \] Its $K_c$ value is
The following methods can not be used to remove permanent hardness of water:
At 300 K, the following graph is obtained for one mole of an ideal gas. If its pressure is 10 atm, then its volume (in L) will be