List of top Chemistry Questions asked in JEE Main

If 2 g phenol is allowed to react with \( \text{Br}_2/\text{H}_2\text{O} \), how much \( \text{Br}_2 \) will be required to produce 2,4,6-tribromophenol (rounded to the nearest integer)?
Calculate the percentage by weight of S if 160 grams of organic compound produce 466 grams of BaSO₄.
Which of the following react with Hinsberg reagent?
Lassaigne's test: Ionic bond converts to covalent bond.
Statement 1: Fructose can give Tollens' test even though it does not have an aldehyde group.
Statement 2: When reacted with base, fructose can undergo rearrangement to produce an aldehyde group.
Which of the following pair of ions are same coloured?
Which of the following can show face-mer isomerism?
Which of these is aromatic in nature?
Which of the following elements doesn't lie on the same period?

Consider the complex \( [Cu(NH_3)_4]^{2+} \). Which of the following statements is correct about this complex?

The coefficients of thermal conductivity are given as: \[ K_1 = 60 W/m^\circ C, K_2 = 120 W/m^\circ C, K_3 = 135 W/m^\circ C \] The temperature at the leftmost end is 100°C and the rightmost end is 0°C. Find the temperature \( \theta \) at the junction.
How many compounds have a linear shape among \( \text{SO}_2 \), \( \text{BeCl}_2 \), \( \text{N}_3^- \), \( \text{I}_3^- \), \( \text{NO}_2^+ \), \( \text{NO}_2 \)?
Density of 3 M NaOH is 1.25 g/ml. Molality of solutions is.
Which of the following has the maximum size?
Find the dimensions of \( \frac{B}{\mu_0} \)
For \([ \text{NiCl}_4 ]^{2-}\), what is the charge on the metal and shape of the complex respectively?
Compare boiling point of given solutions:
(i) \( 10^{-4} \) NaCl
(ii) \( 10^{-3} \) NaCl
(iii) \( 10^{-2} \) NaCl
(iv) \( 10^{-4} \) urea
Which of the following is the correct order of acidic strength for the following compounds: HNO\(_3\), HClO\(_4\), and HClO\(_3\)?
What is the hybridization of the central atom in the molecule \( \text{SO}_3 \)?
In an oxidation-reduction reaction, what happens to the oxidation state of the central atom in \( \text{MnO}_4^- \) when it is reduced to \( \text{Mn}^{2+} \)?
In the reaction \( 2\text{H}_2\text{O}_2 \rightarrow 2\text{H}_2\text{O} + \text{O}_2 \), what is the role of potassium iodide (KI) in this reaction?
What is the shape of the \( \text{ClO}_2^- \) ion according to VSEPR theory?

The number of species from the following which are paramagnetic and with bond order equal to one is ___.

Species: H2, He2+, O2-, N2, O22-, F2, Ne2+, B2

How many of the following compounds have \(sp^3\) hybridized central atoms?
\(H_2O, NH_3, SiO_2, SO_2, CO, CH_4\) and \(BF_3\)
Find out the final product C
Find out the final product C