IPE 2025 IMPORTANT QUESTIONS-S BLOCK ELEMENTS

IPE 2025 IMPORTANT QUESTIONS Chemistry:

IPE 2025 IMPORTANT QUESTIONS S-BLOCK ELEMENTS 2Marks

IPE 2025 IMPORTANT QUESTIONS

1.Why Lithium salts are mostly hydrated ?
Ans: 1.Small size
2.High hydration energy ..Eg.LiCl.2H₂O

2.Why is Gypsum is added to cement ?
Ans: 1.It slows downs the process of setting.
2.It harden’s the cement.

3.Plaster of Paris:CaSO₄1/2H2O
4.Gypsum : CaSO₄.2H₂O
5.Milk of Magnesia : Mg(OH)₂

6.Uses:
1.Plaster of Paris: CaSO₄1/2H₂O ( story to remember )
నేను పారిస్ లో ఒక STATUE చూశాను. అది విరిగి నా చేయి మీద పడి BONE FRACTURE అయ్యింది.నేను వెంటనే పక్కన ఉన్న BUILDING లో కి వెళ్ళాను.అక్కడ ఒక Dentist డాక్టర్ ఉన్నాడు.
అప్పుడు అతడు అక్కడే ఉన్న LAB లో కి వెళ్లి నాకు నా చేయి చుట్టూ MOULD వేసాడు.

1. making statues
2. Used in bone fractures
3. used in building constructions
4. used in dentist labs or dentistry
5. used in labs
6. used in making moulds.
   

7. Uses of Caustic Soda (NaOH): story to remeber

నేను సోడా త్రాగాగానే నా చేతులు జిడ్డుగా వున్నాయి.వెంటనే SOAP తో కడిగాను జిడ్డు పోలేదు,మల్లీ
PAPER తో తుడిచాను పోలేదు.అప్పుడు అక్కడే ఒక CLOTH ఇండస్ట్రీ ఉంది,అందులోకి వెళ్లి LAB లో వెళ్ళాను,అక్కడ REFINED PETROL ఉంది,దానితోటి కడిగాను,అప్పుడు పోయింది.

1.Making Soaps,
2.Making Paper,
3.Used in Cloth Industry
4.Used in Labs as Laboratory reagent
5.Used in making Refining Petrol.

8.Uses of Sodium Carbonate(Na₂CO₃) :

నేను కార్ లో మా ఊరికి పోతున్నాను. GLASS లోనుంచి బయటకి చూసాను. ఏమి కనపడుటలేదు.,అంతా దుమ్ము ఉంది,వెంటనే PAPER తో తుడిచాను. వెంటనీ కార్ ఆపి అక్కడే ఉన్న CLOTH INDUSTRY లో కి వెళ్ళాను.అక్కడే ఉన్న LAB లో ఉన్న SOFT WATER తెస్సుకొచ్చి కడిగాను అప్పుడు అద్దం లో నుంచి బయటకు చూసుకుంటూ ఎంజాయ్ చేశాను.

1.Making Glass
2.Making Paper
3.Used in Cloth Industries or Textile Industry
4.Used in Labs as Laboratory reagent
5.Making Soft Water.

IPE 2025 IMPORTANT QUESTIONS

9.Biological Importance of Na⁺ and K+

What is Inert Pair Effect ?

The reluctance of ns pair of electrons to take part in bond formation is called Inert pair effect. (or )

The ns pair of electrons doesn’t show interest in bond formation is called Inert pair effect.

Example : Lead ( Pb) show +2 oxidation state
Lead ( Pb) doesn’t show +4 oxidation state.

IPE 2025 IMPORTANT QUESTIONS-p block elements
IPE 2025 IMPORTANT QUESTIONS-Environmental chemistry
IPE 2025 IMPORTANT QUESTIONS-Stichiometry
IPE 2025 IMPORTANT QUESTIONS-Thermodynamics
IPE 2025 IMPORTANT QUESTIONS-Oganic Chemistry

😎😎💥EAPCET Questions from S-Block elements 💥

1. Which of the following is an s-block element?

a. Carbon
b. Oxygen
c. Sodium
d. Silicon
Ans: c. Sodium

2. What is the electronic configuration of lithium?

a. 1s² 2s²
b. 1s² 2s¹
c. 1s¹ 2s¹
d. 1s¹ 2p¹
Ans: b. 1s² 2s¹

3. Which element belongs to group 1 of the periodic table?

a. Magnesium
b. Potassium
c. Zinc
d. Aluminium
Ans: b. Potassium

4. Which of the following is a characteristic of alkali metals?

a. High melting points
b. High ionization energy
c. Good conductors of electricity
d. High density
Ans: c. Good conductors of electricity

5. What is the oxidation state of sodium in Na₂O?

a. -1
b. +1
c. 0
d. +2
Ans: b. +1

6. Which of the following alkali metals has the highest reactivity with water?

a. Lithium
b. Sodium
c. Potassium
d. Rubidium
Ans: d. Rubidium

7. What is the trend of atomic radius in group 1 elements as you move down the group?

a. Increases
b. Decreases
c. Remains the same
d. Varies irregularly
Ans: a. Increases

8. Which of the following is an alkaline earth metal?

a. Calcium
b. Aluminum
c. Iron
d. Copper
Ans: a. Calcium

9. Which alkali metal is least reactive with water?

a. Lithium
b. Sodium
c. Potassium
d. Cesium
Ans: a. Lithium

10. What is the common charge of ions formed by group 2 elements?

a. +1
b. +2
c. -1
d. -2
Ans: b. +2

11. Which of the following is the most electropositive element?

a. Sodium
b. Magnesium
c. Calcium
d. Cesium
Ans: d. Cesium

12. Which of the following compounds is soluble in water?

a. CaSO₄
b. NaCl
c. MgCO₃
d. BaSO₄
Ans: b. NaCl

13. What is the flame color of potassium?

a. Red
b. Yellow
c. Lilac
d. Green
Ans: c. Lilac

14. Which element has the highest first ionization energy among the alkali metals?

a. Lithium
b. Sodium
c. Potassium
d. Rubidium
Ans: a. Lithium

15. What is the trend of melting points in group 2 elements as you move down the group?

a. Increases
b. Decreases
c. Remains the same
d. Varies irregularly
Ans: b. Decreases

16. Which alkaline earth metal is used in fireworks to produce a red color?

a. Beryllium
b. Magnesium
c. Calcium
d. Strontium
Ans: d. Strontium

17. Which group 1 element is the least dense?

a. Lithium
b. Sodium
c. Potassium
d. Cesium
Ans: a. Lithium

18. Which of the following is not an s-block element?

a. Lithium
b. Beryllium
c. Boron
d. Magnesium
Ans: c. Boron

19. What is the oxidation state of magnesium in MgCl₂?

a. +1
b. +2
c. 0
d. -1
Ans: b. +2

20. Which of the following is a property of alkaline earth metals?

a. High ionization energy
b. Low melting points
c. Low density
d. Reactivity with water increases down the group
Ans: d. Reactivity with water increases down the group

21. What is the electronic configuration of calcium?

a. 1s² 2s² 2p⁶ 3s² 3p⁶ 4s²
b. 1s² 2s² 2p⁶ 3s² 3p⁶ 4p¹
c. 1s² 2s² 2p⁶ 3s² 3p⁶ 4s¹
d. 1s² 2s² 2p⁶ 3s² 3p⁶ 3d¹
Ans: a. 1s² 2s² 2p⁶ 3s² 3p⁶ 4s²

22. Which element belongs to group 2 of the periodic table?

a. Sodium
b. Calcium
c. Iron
d. Chlorine
Ans: b. Calcium

23. Which of the following alkali metals forms the most stable oxides?

a. Lithium
b. Sodium
c. Potassium
d. Rubidium
Ans: a. Lithium

24. What is the flame color of sodium?

a. Blue
b. Green
c. Yellow
d. Red
Ans: c. Yellow

25. Which alkaline earth metal is used in the manufacture of cement?

a. Magnesium
b. Calcium
c. Strontium
d. Barium
Ans: b. Calcium

26. What is the trend of reactivity in group 1 elements as you move down the group?

a. Increases
b. Decreases
c. Remains the same
d. Varies irregularly
Ans: a. Increases

27. Which of the following is a common use of lithium?

a. Jewelry
b. Batteries
c. Fertilizer
d. Construction
Ans: b. Batteries

28. What is the oxidation state of beryllium in BeO?

a. +1
b. +2
c. 0
d. -2
Ans: b. +2

29. Which alkaline earth metal is used as a reducing agent in the extraction of uranium?

a. Beryllium
b. Magnesium
c. Calcium
d. Strontium
Ans: c. Calcium

30. What is the trend of ionization energy in group 2 elements as you move down the group?

a. Increases
b. Decreases
c. Remains the same
d. Varies irregularly
Ans: b. Decreases