List of top Chemistry Questions

Which of the following sets of reagents are required for the conversion of ethyl bromide to propanoic acid?

Two reactions I and II are given below:

Correct statement regarding the reactions is

Z forms 2,4-dinitrophenylhydrazone and gives yellow ppt with NaOH + $I_2$. What are X and Y?

An alcohol X($C_5H_{12}O$) undergoes dehydration when passed over copper at 573 K. X can be prepared from which of the following reactants?

An alcohol X($C_4H_{10}O$) is converted to corresponding chloride Y by shaking it with conc. HCl at room temperature. Reaction of Y with Mg in dry ether and then with water gave Z. What are Y and Z?

Observe the following reaction:
$CH_3(CH_2)_{11}C_6H_5 \xrightarrow[(ii) NaOH(aq)]{(i) H_2SO_4} X$
Which of the statements is not correct regarding X?

Which of the following saccharides contain $\beta$-D-glucose units?

Consider the following statements
Statement - I : Natural rubber is a polymer of 2-chloro-1, 3-butadiene
Statement - II : 1, 3-Butadiene-styrene copolymer is synthetic rubber
The correct answer is

Arrange the given ligands $H_2O (A), NCS^- (B), OH^- (C), N^{3-} (D)$ in the order of increasing field strength.

Which of the following change is not correct about the oxidizing property of $KMnO_4$ in acidic medium?

Which of the following statements is not correct?

Oxoacids of phosphorus are formed in the following reactions. The acid formed in which of the following reactions does contain P - P bond?

Red phosphorus, when heated in a sealed tube at 803 K, gives 'X'. White phosphorus, when heated under high pressure at 473 K, gives 'Y'. X, Y respectively are

Which of the following involves electrolysis?

Observe the following colloids:
I. Gold
II. Detergent
III. Starch
IV. Soap
V. Synthetic rubber
VI. Sulphur
VII. Cellulose
The number of multimolecular colloids and macromolecular colloids in the above list is respectively

For a first order reaction ($R \rightarrow P$), a plot of $\ln \frac{[R]_0}{[R]}$ on y-axis and time on x-axis gave a straight line passing through the origin. The slope of straight line is 'x'. The rate constant of this reaction is

The equilibrium constant for the reaction $M(s) + 2Ag^{+}(aq) \rightarrow M^{2+}(aq) + 2Ag(s)$ is $10^{15}$. What is the Gibbs energy change ($\Delta_r G^{\ominus}$ in KJ mol$^{-1}$) for this reaction?
($\frac{RT}{F} \times 2.303 = 0.06V$; F = 96500 C mol$^{-1}$)

A 200 mL of 30% (V/V) of a solution is mixed with 500 mL of 40% (V/V) another solution. What is the volume percentage of resultant solution?

Observe the following:
$O_2, C_6H_6, Cu^{2+}, Cu^+, MnO, Fe_3O_4, MgFe_2O_4, NaCl, O_2^+$.
The number of diamagnetic and paramagnetic species is respectively

What are X, Y, Z in the following reaction sequence?

In which of the following, the compounds are arranged in the correct order of acidic strength?

An alkene X ($C_5H_{10}$) on ozonolysis gave formaldehyde and butyraldehyde. The products from the reaction of X with (i) $H_2O/H^{\oplus}$ and (ii) $HBr((C_6H_5COO)_2$ are respectively

Aniline can be separated from a mixture of chloroform - aniline by a technique X and from aniline - water mixture by technique Y. X and Y respectively are

Identify the correct statements about photochemical smog
I. PAN is one of the components of photochemical smog
II. It forms cracks in rubber
III. It is an oxidizing smog

Among the following the neutral oxide is