List of top Chemistry Questions

Which of the following solutions can form a minimum boiling azeotrope?

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:

The correct IUPAC name of the product 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:

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

The correct IUPAC name of the compound is:

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:
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: $NH_3$, $PhSH$, $(H_3C_2S)_2$, $H_2C=CH_2$, $OH^-$, $H_3O^+$, $(CH_3)_2CO$, $NCH_3$
Which of the following has $\text{sp}^3\text{d}^2$ hybridisation?
Atomic number of element with lowest first ionisation enthalpy is
The correct order of basic strength of the following molecules is:
(A) \(\text{C}_6\text{H}_4\text{NH}_2\text{O}\)
(B) \(\text{C}_6\text{H}_4\text{NH}_2\text{MeO}\)
(C) \(\text{C}_6\text{H}_4\text{NH}_2\text{NO}_2\)
(D) \(\text{C}_6\text{H}_4\text{NH}_2\text{CH}_3\)

Consider the following oxides: 
V_2O_5, Cr_2O_3, Mn_2O_7, V_2O_3, VO_2 
A number of oxides which are acidic is \( x \). 
Consider the following complex compound: 
[Co(NH_2CH_2CH_2NH_2)_3](SO_4)_3 
The primary valency of the complex is \( y \). 
What is the value of \( x + y \) is?

Which of the following is the correct hybridization of \( \text{XeF}_4 \)?
Which of the following is the correct order of acidic character of oxides of vanadium?
If \( x |x - 3| + 3 |x - 2| + 1 = 0 \), then the number of real solutions is.
Statement-1: Alcohol is prepared from alkyl halide in the presence of aqueous KOH by elimination.
Statement-2: Alkenes are prepared from alkyl halide with alcoholic KOH by $\beta$-elimination.
Which of the following options is correct? 1. Statement-1 and Statement-2 are correct.
2. Statement-1 and Statement-2 are incorrect.
3. Statement-1 is true and Statement-2 is false.
4. Statement-1 is false and Statement-2 is true.
Maximum IE and minimum IE of group 13 elements are:
Given below are two statements: - Assertion (A): Sodium on reaction with alcohols liberates \( \text{H}_2 \) gas. - Reason (R): Alcohols are acidic in nature. In the light of the above statements, choose the correct answer from the options below: