Chemistry
Grade-9
Easy
Question
What type of reaction occurs when an alkali metal combines with water?
- Decomposition
- Exothermic
- Endothermic
- Neutralisation
Hint:
Heat is evolved when alkali metals react with water.
The correct answer is: Exothermic
- Alkali metals show vigorous reaction with water.
- Sodium is very reactive when it comes in touch with water it catches fire.
- Hence, exothermic reaction occurs when an alkali metal combines with water.
Related Questions to study
Chemistry
Alkali metals react with water to form:
Alkali metals react with water to form:
ChemistryGrade-9
Chemistry
Among the following, the element possessing a low melting point is:
Among the following, the element possessing a low melting point is:
ChemistryGrade-9
Chemistry
Which elements are found on the right side of the periodic table?
Which elements are found on the right side of the periodic table?
ChemistryGrade-9
Chemistry
The element given below is dull and brittle. It is:
The element given below is dull and brittle. It is:
ChemistryGrade-9
Chemistry
Which of the following is a physical characteristic of a metalloid?
Which of the following is a physical characteristic of a metalloid?
ChemistryGrade-9
Chemistry
How do metals differ from non-metals?
How do metals differ from non-metals?
ChemistryGrade-9
Chemistry
Which of the following correctly lists the three main groups of elements from greatest conductivity to least conductivity?
Which of the following correctly lists the three main groups of elements from greatest conductivity to least conductivity?
ChemistryGrade-9
Chemistry
All of the following are properties used to classify elements as metals, non-metals, and metalloids except:
All of the following are properties used to classify elements as metals, non-metals, and metalloids except:
ChemistryGrade-9
Chemistry
Which of the following is a property of a non-metal?
Which of the following is a property of a non-metal?
ChemistryGrade-9
Chemistry
A student is given a sample of an unknown substance. He is asked to determine if it is classified as a metal, a metalloid, or a non-metal. He discovered that the unknown element conducted some heat and electricity, had a shiny lustre, and broke easily. This element is most likely a
A student is given a sample of an unknown substance. He is asked to determine if it is classified as a metal, a metalloid, or a non-metal. He discovered that the unknown element conducted some heat and electricity, had a shiny lustre, and broke easily. This element is most likely a
ChemistryGrade-9
Chemistry
All of the following would classify an element as a metal except?
All of the following would classify an element as a metal except?
ChemistryGrade-9
Chemistry
Which of these is a property of metals?
Which of these is a property of metals?
ChemistryGrade-9
Chemistry
Which of these grouping of elements could have the characteristic of luster (shiny)?
Which of these grouping of elements could have the characteristic of luster (shiny)?
ChemistryGrade-9
Chemistry
Which elements are to the right of the zig-zag?
Which elements are to the right of the zig-zag?
ChemistryGrade-9
Chemistry
The order of elements in the modern periodic table is based on an element's
The order of elements in the modern periodic table is based on an element's
ChemistryGrade-9
