List of top Chemistry Questions

It is possible to separate o-nitrophenol and p-nitrophenol using steam distillation because o-nitrophenol has
In the redox reaction between $ \text{Cr}_2\text{O}_7^{2-} $ / $ \text{H}^+ $ and sulphite ion, what is the number of moles of electrons involved in producing 3.0 moles of the oxidised product?
For a reaction $ 5X + Y \to 3Z $, the rate of formation of Z is $ 2.4 \times 10^{-5} \, \text{mol L}^{-1} \text{s}^{-1} $. Calculate the average rate of disappearance of X.
Arrange the compounds A, B, C, and D in the increasing order of their reactivity towards SN$_1$ reaction.
A = C$_6$H$_5$CH$_2$Cl
B = C$_6$H$_5$Cl
C = CH$_2$=CH–Cl
D = CH$_3$–CH$_2$–Cl
What volume of 0.2 M Acetic acid is to be added to 100ml of 0.4M Sodium acetate so that a Buffer solution of pH equal to 4.94 is obtained? (pK$_a$ of CH$_3$COOH = 4.76)

Compounds A and B, having the same molecular formula \( C_4H_8O \), react separately with \( CH_3MgBr \), followed by reaction with dil. HCl to form compounds X and Y respectively. Compound Y undergoes acidic dehydration in the presence of Conc. \( H_2SO_4 \) much more readily than X. Compound Y also reacts with Lucas reagent, much more readily than X, with the appearance of turbidity. Identify X and Y.

A dry cell consists of a moist paste of $ \text{NH}_4\text{Cl} $ and $ \text{ZnCl}_2 $ contained in a Zn casing which encloses a carbon rod surrounded by black $ \text{MnO}_2 $ paste. What is the role of $ \text{ZnCl}_2 $ in it?
How many grams of Albumin and Aspirin will be required to set a reaction between one millimole of Albumin and 0.5 millimole of Aspirin? Given the molecular weight of Albumin is 67,000 Da and that of Aspirin is 180 Da.
Which one of the following statements is NOT correct?
Which of the following 2 compounds exhibit both Geometrical and Structural isomerism?
A = $[Co(NH_3)_4Cl_2]NO_2$
B = $[Co(NH_3)_4Br]SO_4$
C = $[Co(NH_3)_3(NO_2)_2]$
D = $[Cr(H_2O)_6]Cl_3$

What mass of Silver chloride, in grams, gets precipitated when 150 ml of 32% solution of Silver nitrate is reacted with 150 ml of 11% Sodium chloride solution?
Atomic mass in g/mol: Ag = 108, Na = 23, Cl = 35.5, N = 14, O = 16.

Arrange the following compounds in the increasing order of their reactivity when each of them is reacted with chloroethane / anhydrous AlCl₃.

Identify the pair of molecules in which one of them is a molecule with an odd electron and the other has an expanded octet.
In the estimation of element X in an organic compound, 0.8 g of the compound containing X was heated with fuming HNO₃ and the cooled product was treated with barium chloride. The mass of barium sulphate precipitated was 1.2 g. What is the percentage of element X and what is the formula of the violet-coloured compound formed when Lassaigne's extract of the organic compound is treated with sodium nitroprusside?
What is/are the product/s formed when Benzaldehyde and Ethanal react in the presence of dil. NaOH followed by heating the intermediate product formed?
Given are the names of 4 compounds. Two of these compounds will not undergo Cannizzaro's reaction. Identify the two.
Identify the product [C] formed at the end of the reaction below: $ 1,1,2,2-\text{Tetrabromopropane} + 2 \text{Zn (s)}/ \text{Ethanol} \rightarrow [B] $ $ [B] + 2 \text{moles of HBr} \rightarrow [C] $
What is the final concentration of NaCl upon mixing 10 ml of 10 mM NaCl with 990 ml of 10 mM NaCl?
Animal gut does NOT possess the enzymes required for digesting
Which of the following pair of monosaccharides contains epimers of each other?
Which law of thermodynamics states that "energy of an isolated system is constant"?
Corrosion of silver results in the formation of
Possible number of isomers including stereoisomers for an organic compound with the molecular formula \( C_4H_9Br \) is:
Poling process is used to
During corrosion, a metal will