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Answered 16 hrs ago Learn NCERT Solutions

Sadika

Two important observations of the reaction are: The mixture produces heat and generates steam, indicating an exothermic reaction. The quicklime dissolves in water to form calcium hydroxide (slaked lime), accompanied by the release of heat and the formation of a milky white suspension. The type of... read more
  1. Two important observations of the reaction are:
    • The mixture produces heat and generates steam, indicating an exothermic reaction.
    • The quicklime dissolves in water to form calcium hydroxide (slaked lime), accompanied by the release of heat and the formation of a milky white suspension.

The type of reaction taking place is a chemical reaction, specifically an exothermic reaction, in which quicklime (calcium oxide) reacts with water to form calcium hydroxide (slaked lime) and release heat.

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Answered 16 hrs ago Learn NCERT Solutions

Sadika

Physical properties of carbon compounds or covalent compounds: Some physical properties of carbon compounds or covalent compounds include: Low melting and boiling points Often exist as gases, liquids, or solids at room temperature Non-conductive of electricity in the solid state Often have low solubility... read more

Physical properties of carbon compounds or covalent compounds: Some physical properties of carbon compounds or covalent compounds include:

  • Low melting and boiling points
  • Often exist as gases, liquids, or solids at room temperature
  • Non-conductive of electricity in the solid state
  • Often have low solubility in water
  • May exhibit a wide range of colors, odors, and textures
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Answered 15 hrs ago Learn Metals and Non Metals

Sadika

Element A Burning with Golden Flame in Air and Reacting with Element B: Element A is sodium (Na). Element B with atomic number 17 is chlorine (Cl). Product C is sodium chloride (NaCl). Aqueous solution of C on electrolysis gives compound D, which is sodium hydroxide (NaOH), and liberates hydrogen... read more

 

  • Element A Burning with Golden Flame in Air and Reacting with Element B:

    • Element A is sodium (Na).
    • Element B with atomic number 17 is chlorine (Cl).
    • Product C is sodium chloride (NaCl).
    • Aqueous solution of C on electrolysis gives compound D, which is sodium hydroxide (NaOH), and liberates hydrogen gas (H2).
    • Reactions:
      • 2Na(s) + Cl2(g) → 2NaCl(s)
      • 2NaCl(aq) + 2H2O(l) → 2NaOH(aq) + Cl2(g) + H2(g)

 

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Answered 15 hrs ago Learn Acids, Bases and Salts

Sadika

Neutralization reaction is a chemical reaction in which an acid reacts with a base to form a salt and water. Two examples of neutralization reactions are: Hydrochloric acid (HCl) + Sodium hydroxide (NaOH) → Sodium chloride (NaCl) + Water (H2O) Sulfuric acid (H2SO4) + Calcium hydroxide (Ca(OH)2)... read more

 

  • Neutralization reaction is a chemical reaction in which an acid reacts with a base to form a salt and water. Two examples of neutralization reactions are:

    • Hydrochloric acid (HCl) + Sodium hydroxide (NaOH) → Sodium chloride (NaCl) + Water (H2O)
    • Sulfuric acid (H2SO4) + Calcium hydroxide (Ca(OH)2) → Calcium sulfate (CaSO4) + Water (H2O)

 

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Answered 14 hrs ago Learn Acids, Bases and Salts

Sadika

Acids do not show acidic behavior in the absence of water because the characteristic properties of acids, such as the donation of hydrogen ions (H+) and the ability to react with bases, depend on the presence of water molecules to facilitate proton transfer reactions. In the absence of water, acids... read more

 

  • Acids do not show acidic behavior in the absence of water because the characteristic properties of acids, such as the donation of hydrogen ions (H+) and the ability to react with bases, depend on the presence of water molecules to facilitate proton transfer reactions. In the absence of water, acids cannot ionize and exhibit their acidic properties.

 

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Answered 14 hrs ago Learn Periodic classification of elements

Sadika

Noble gases are placed in a separate group because they have unique chemical properties compared to other elements. They are characterized by their inertness and stable electron configurations, with fully filled outer electron shells.
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Answered 14 hrs ago Learn Periodic classification of elements

Sadika

Lithium, sodium, and potassium belong to the same group called alkali metals because they share similar chemical properties, including the tendency to lose one electron to form positively charged ions (cations).
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Answered 14 hrs ago Learn Periodic classification of elements

Sadika

Characteristics of a period include: Elements in the same period have the same number of electron shells. The number of valence electrons increases across a period from left to right. Chemical properties of elements within a period gradually change as one moves across the periodic table. read more

 

  • Characteristics of a period include:

    • Elements in the same period have the same number of electron shells.
    • The number of valence electrons increases across a period from left to right.
    • Chemical properties of elements within a period gradually change as one moves across the periodic table.

 

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Answered 14 hrs ago Learn Periodic classification of elements

Sadika

Three points of difference between Mendeleev's Periodic Table and the Modern Periodic Table are: Mendeleev's table was based on increasing atomic mass, while the modern periodic table is based on increasing atomic number. Mendeleev left gaps in his table for undiscovered elements, while the modern... read more

 

  • Three points of difference between Mendeleev's Periodic Table and the Modern Periodic Table are:

    • Mendeleev's table was based on increasing atomic mass, while the modern periodic table is based on increasing atomic number.
    • Mendeleev left gaps in his table for undiscovered elements, while the modern table does not have gaps and accommodates all known elements.
    • Mendeleev's table did not accurately predict the properties of all elements, while the modern table provides a more accurate representation of element properties based on atomic structure and periodic trends.
  •  

 

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