List of top Chemistry Questions

In which of the following reactions, major product is matched correctly?

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

Consider the following amino acid:

Which of the following options contain the correct structure of (A) and (B)?
 

The correct IUPAC name of the product is:

Match list-I with list-II and choose the correct option.

On combustion of 0.21 g of an organic compound containing C, H, and O, it gave 0.127 g of H$_2$O and 0.307 g of CO$_2$. The percentage of H and O in the given organic compound respectively are:

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

Which of the following solutions can form a minimum boiling azeotrope?
An aqueous solution of 0.1 M HA shows depression in freezing point of 0.2°C. If $ K_f $ (H$_2$O) = 1.86 K kg mol$^{-1}$ and assuming molarity = molality, find the dissociation constant of HA.
Correct decreasing order of spin-only magnetic moment values is:

The correct sequence of reagents to be added for the following conversion is:

The correct IUPAC name of the compound is:

For a first-order reaction, the ratio of time required is $ \frac{t_1}{t_2} $, if $ t_1 $ is the time consumed when reactant reaches $ \frac{1}{4} $ of initial concentration and $ t_2 $ is the time when it reaches $ \frac{1}{8} $ of initial concentration.
Consider the following statements:
Statement-I: H$_2$Se is more acidic than H$_2$Te.
Statement-II: H$_2$Se has higher bond dissociation enthalpy than H$_2$Te.
In light of the above statements, choose the correct option:
Consider the following sequence of reactions given below: $ \text{Br-C}_6\text{H}_5 \xrightarrow{\text{alc. KOH}} \text{C}_6\text{H}_4 \xrightarrow{\text{NaNH}_2} \text{C}_6\text{H}_3 \xrightarrow{Hg^{2+}} \text{C}_6\text{H}_2 \xrightarrow{Zn-Hg} P $ The product P is:
Which of the following has $ sp^3d^2 $ hybridization?
Consider the last electron of element having atomic number 9 and choose the correct option.
In 3, 3-dimethylhex-1-en-4-yne, the number of sp, sp² and sp³ carbon atoms, respectively are:

Nature of compounds TeO₂ and TeH₂ is___________ and ______________respectively.

For the reaction, $H_2(g) + I_2(g) \rightleftharpoons 2HI(g)$

Attainment of equilibrium is predicted correctly by: 


 
 

IUPAC name of the chemical compound \( \text{Ni(PPh}_3)_2\text{Cl_2 \) \( 2+ \)?}
Total number of nucleophiles from the following is: $NH_3$, $PhSH$, $(H_3C_2S)_2$, $H_2C=CH_2$, $OH^-$, $H_3O^+$, $(CH_3)_2CO$, $NCH_3$

1.24 g of $ {AX}_2 $ (molar mass 124 g mol$^{-1}$) is dissolved in 1 kg of water to form a solution with boiling point of 100.105$^\circ$C, while 2.54 g of $ {AY}_2 $ (molar mass 250 g mol$^{-1}$) in 2 kg of water constitutes a solution with a boiling point of 100.026$^\circ$C. $ K_{b(H_2O)} = 0.52 \, \text{K kg mol}^{-1} $. Which of the following is correct?

The heat of formation of \( \text{SO}_2(g) \) is given by: $$ S(g) + \frac{3}{2} O_2(g) \rightarrow SO_3(g) + 2x \, \text{kcal} $$ $$ SO_2(g) + \frac{1}{2} O_2(g) \rightarrow SO_3(g) + y \, \text{kcal} $$ 
For the reaction, $$ H_2(g) + I_2(g) \rightleftharpoons 2HI(g) $$ Attainment of equilibrium is predicted correctly by: