List of top Chemistry Questions asked in JEE Main

Given below are two statements: Statement (I): \textit{Nitrogen, sulphur, halogen, and phosphorus present in an organic compound are detected by Lassaigne's Test.}
Statement (II): \textit{The elements present in the compound are converted from covalent form into ionic form by fusing the compound with Magnesium in Lassaigne's test.} In the light of the above statements, choose the correct answer from the options given below:

Arrange the following compounds in increasing order of their dipole moment:
HBr, H\(_2\)S, NF\(_3\), and CCl\(_3\)

The molar solubility(s) of zirconium phosphate with molecular formula \( \text{Zr}^{4+} \text{PO}_4^{3-} \) is given by relation: \includegraphics[width=1\linewidth]{333.png}

Given below are two statements: Statement (I): \textit{An element in the extreme left of the periodic table forms acidic oxides.}
Statement (II): \textit{Acid is formed during the reaction between water and oxide of a reactive element present in the extreme right of the periodic table.} In the light of the above statements, choose the correct answer from the options given below:

Given below are two statements: Statement (I): \textit{Corrosion is an electrochemical phenomenon in which pure metal acts as an anode and impure metal as a cathode.}
Statement (II): \textit{The rate of corrosion is more in alkaline medium than in acidic medium.} In the light of the above statements, choose the correct answer from the options given below:

Match List - I with List - II. List - I (Partial Derivatives) \quad List - II (Thermodynamic Quantity)

Consider the given figure and choose the correct option: \includegraphics[width=1\linewidth]{322.png}

Consider ‘n’ is the number of lone pair of electrons present in the equatorial position of the most stable structure of \( \text{ClF}_3 \). The ions from the following with ‘n’ number of unpaired electrons are:
A. \( \text{V}^{3+} \)  
B. \( \text{Ti}^{3+} \) 
C. \( \text{Cu}^{2+} \) 
D. \( \text{Ni}^{2+} \) 
E. \( \text{Ti}^{2+} \)
Choose the correct answer from the options given below:

Consider the following elements In, Tl, Al, Pb, and Ge. The most stable oxidation states of elements with highest and lowest first ionisation enthalpies, respectively, are:

Which of the following oxidation reactions are carried out by both \( K_2Cr_2O_7 \) and \( KMnO_4 \) in acidic medium?
A. \( I^- \rightarrow I_2 \)
B. \( S^{2-} \rightarrow S \)
C. \( Fe^{2+} \rightarrow Fe^{3+} \)
D. \( I^- \rightarrow IO_3^- \)
E. \( S_2O_3^{2-} \rightarrow SO_4^{2-} \)
Choose the correct answer from the options given below:

In a multielectron atom, which of the following orbitals described by three quantum numbers will have the same energy in absence of electric and magnetic fields?
A. \( n = 1, l = 0, m_l = 0 \)
B. \( n = 2, l = 0, m_l = 0 \)
C. \( n = 2, l = 1, m_l = 1 \)
D. \( n = 3, l = 2, m_l = 1 \)
E. \( n = 3, l = 2, m_l = 0 \)
Choose the correct answer from the options given below:

Match the LIST-I with LIST-II (Redox Reactions).

Choose the correct answer from the options given below:

Given below are two statements:

, intramolecular substitution takes place first by involving lone pair of electrons on nitrogen.