7 questions from 2026
Given below are two statements:
Statement (I): Oxidising power of halogens decreases in the order \( \mathrm{F_2 > Cl_2 > Br_2 > I_2} \), which is the basis of “Layer test”.
Statement (II): “Layer test” to identify \( \mathrm{Br_2} \) and \( \mathrm{I_2} \) in aqueous solution involves the oxidation of bromide or iodide into \( \mathrm{Br_2} \) or \( \mathrm{I_2} \) respectively with \( \mathrm{Cl_2} \), which is a type of displacement redox reaction.
\( \mathrm{O_2 > O_2^{+} > O_2^{-} > O_2^{2-}} \)
In the light of the above statements, choose the correct answer from the options given below:
Given below are two statements:
Statement I: Aluminium upon reaction with \( \mathrm{NaOH} \) forms \( [\mathrm{Al(OH)_6}]^{3-} \) ion.
Statement II: The geometry of \( \mathrm{ICl_4^-}, \mathrm{ClO_3^-} \) and \( \mathrm{IBr_2^-} \) is square planar, pyramidal and linear respectively.
In the light of the above statements, choose the correct answer from the options given below:
Given below are two statements:
Statement I: Elements ‘\( X \)’ and ‘\( Y \)’ are the most and least electronegative elements, respectively among \( \mathrm{N} \), \( \mathrm{As} \), \( \mathrm{Sb} \) and \( \mathrm{P} \). The nature of the oxides \( X_2O_3 \) and \( Y_2O_3 \) is acidic and amphoteric, respectively.
Statement II: \( \mathrm{BCl_3} \) is covalent in nature and gets hydrolysed in water. It produces \( [\mathrm{B \, (O H_4)}]^- \) and \( \mathrm[\text{B}(\text{H}_2\text{O})_6]^{3+} \) in aqueous medium.
In the light of the above statements, choose the correct answer from the options given below:
The electronegativity of a group \( 13 \) element 'E' is same as that of \( \mathrm{Ge} \) (on Pauling scale and upto one decimal point). The CORRECT statements about \( \mathrm{E^{3+}} \) are:
A. It can act as a reducing agent.
B. It can act as an oxidizing agent.
C. \( \mathrm{E^{3+}} \) is more stable than \( \mathrm{E^{+}} \).
D. The standard electrode potential value for \( \mathrm{E^{3+}/E} \) is positive.
Choose the correct answer from the options given below:
Correct statements from the following are:
A. Nitrogen in oxidation states from \( +1 \) to \( +4 \) disproportionates in acid medium.
B. Nitrogen has the ability to form \( d\pi - p\pi \) multiple bonds with itself and other elements with small size and high electronegativity.
C. \( \mathrm{N{-}N} \) single bond is stronger than \( \mathrm{P{-}P} \) single bond.
D. Nitrogen has highest density in its group due to small size.
E. The maximum covalency of nitrogen is four since it has only four valence orbitals for bonding.
Choose the correct answer from the options given below:
Given below are two statements:
Statement I: The halogen that makes longest bond with hydrogen in HX, has the smallest covalent radius in its group.
Statement II: A group \( 15 \) element's hydride \( \mathrm{EH} \) has the lowest boiling point among corresponding hydrides of other group \( 15 \) elements. The maximum covalency of that element \( \mathrm{E} \) is \( 4 \).
In the light of the above statements, choose the correct answer from the options given below:
Elements \( X \) and \( Y \) belong to Group \( 15 \). The difference between the electronegativity values of ‘\( X \)’ and phosphorus is higher than that of the difference between phosphorus and ‘\( Y \)’. ‘\( X \)’ and ‘\( Y \)’ are respectively
