s-Block Elements: JEE Main Chemistry Previous Year Questions

584 previous year questions from s-Block Elements. Here are the 25 most important ones; open any question for the correct answer and a full step-by-step solution.

1. $Which of the following metals exist in liquid state during summer season?$
2. $The element playing significant role in neuromuscular function and interneuronal transmission is :$
3. $The hybridisations of N -orbitals in NO_{3}^{-}, NO_{2}^{-} and NH_{4}^{+} respectively are$
4. $The chemical nature of hydrogen peroxide is :$
5. $Assertion (A) : Alkali metals and their salts impart characteristic flame colours. Reason (R): Alkali metals have low ionization enthalpy values. So, elec\dots$
6. $When aluminium chloride is dissolved in water, it gives$
7. $The products obtained when chlorine gas reacts with cold and dilute aqueous NaOH are :$
8. $Two metals A and B having similar ionic radii, react with oxygen to give only monoxides and react with nitrogen to give nitrides. Then, A and B respectively a\dots$
9. $Given below are two statementsAssertion (A): The enthalpy of formation of graphite is taken as zero.Reason (R): Graphite is thermodynamically most stable allotrope of car\dots$
10. $KO_{2}, reacts with water to form A, B and C . B forms C when it reacts with iodine in basic medium. What are B and C respectively\dots$
11. $Statement I: Boron does not exhibit allotropy Statement II: Boron is extremely hard and black coloured solid$
12. $When KI is reacted with O_{3} under aqueous condition the product formed is$
13. $Which one of the following statements is not correct?$
14. $Match the following:\dots$
15. $The correct statements from the below: 1.Charcoal can be obtained on heating wood in absence of air. 2.Charcoal is impure form of graphite. 3.Diamond is thermodynamically\dots$
16. $Assertion (A): In group 15 elements nitrogen does not form pentahalidesReason (R): Nitrogen can exhibit +5 oxidation state The correct option among the following is$
17. $The products obtained during treatment of hard water using Clark's method are:$
18. $Which of the following statements are correct ? (A) Both LiCl and M g C l_{2} are soluble in ethanol. (B) The oxides L i_{2} O and MgO combine with excess of oxygen to giv\dots$
19. $Assertion (A) : HCl gas is dried by passing through concentrated H_{2} SO_{4} . Reason (R) : HCl gas reacts with NH_{3} that gives white fumes$
20. $The pair(s) of reagents that yield paramagnetic species is/are$
21. $When KBr is dissolved in water, K^{+} ions are$
22. $Which of the following statements regarding sulphur is not correct?$
23. $Xenon reacts with fluorine at 873 K and 7 bar to form XeF_{4} . In this reaction, the ratio of xenon and fluorine required is$
24. $What are the products of auto-photolysis of water?$
25. $Al + aq. NaOH (excess) ⟶ P + Q . P and Q are$

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s-Block Elements: JEE Main Chemistry Previous Year Questions

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