Chemistry
Grade-7
Easy
Question
____ is the most abundant element that is found in the earth’s crust.
- Al
- Ag
- Au
- Fe
Hint:
Utensils are made from it.
The correct answer is: Al
The correct option is Aluminium.
Aluminum, the third most abundant element on the list of most abundant elements, makes up about 8% of the Earth's crust and is actually the most abundant metal in the Earth's crust. Although it is the most abundant metal, it is always found in the form of compounds and never in the raw state. The most commonly found compounds are potassium aluminum sulfate and aluminum oxide.
Related Questions to study
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Which of the following element has the allotropic property?
- Tin
- Silver
- Copper
- Iron
Which of the following element has the allotropic property?
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- Tin
- Silver
- Copper
- Iron
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Assertion: Alloys are made to modify appearance and color.
Reason: Aluminium bronze (Al + Cu) resembles gold as its bright yellow.
- Both A and R are true, and R is the correct explanation of (A)
- Both A and R are true, but R is not the correct explanation of (A)
- A is true, but R is false.
- A is false, but R is true.
Assertion: Alloys are made to modify appearance and color.
Reason: Aluminium bronze (Al + Cu) resembles gold as its bright yellow.
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- Both A and R are true, and R is the correct explanation of (A)
- Both A and R are true, but R is not the correct explanation of (A)
- A is true, but R is false.
- A is false, but R is true.
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Purpose of making alloys:
- To increase resistance to electricity
- To increase hardness
- To lower the melting point
- All the above
Purpose of making alloys:
ChemistryGrade-7
- To increase resistance to electricity
- To increase hardness
- To lower the melting point
- All the above
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Alloy known for its sonority is
- Bell metal
- Type metal
- Steel
- Bronze
Alloy known for its sonority is
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- Bell metal
- Type metal
- Steel
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Which of the following alloy is used in making aircraft structures?
- Duralumin
- Brass
- Bronze
- Magainin
Which of the following alloy is used in making aircraft structures?
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- Duralumin
- Brass
- Bronze
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Stainless steel is so-called because of its
- High strength
- High corrosion resistance
- High ductility
- Brittleness
Stainless steel is so-called because of its
ChemistryGrade-7
- High strength
- High corrosion resistance
- High ductility
- Brittleness
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_________ is used for making electric switches of various kinds, taps, statues, household utensils, and shells of ammunition rounds.
- Bronze
- Brass
- Both a and b
- None of these
_________ is used for making electric switches of various kinds, taps, statues, household utensils, and shells of ammunition rounds.
ChemistryGrade-7
- Bronze
- Brass
- Both a and b
- None of these
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______ is the alloy used for coating food cans and cooking vessels that are made of copper and iron.
- Bronze
- Brass
- Duralumin
- Stainless steel
______ is the alloy used for coating food cans and cooking vessels that are made of copper and iron.
ChemistryGrade-7
- Bronze
- Brass
- Duralumin
- Stainless steel
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Copper is the major component is which alloy?
- Brass
- Stainless steel
- Bronze
- Both a and c
Copper is the major component is which alloy?
ChemistryGrade-7
- Brass
- Stainless steel
- Bronze
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What is the major component that is present in stainless steel?
- Silver
- Copper
- Iron
- Zinc
What is the major component that is present in stainless steel?
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- Silver
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Copper is found as the main mineral in basaltic lavas and as a reduced form of copper.
- True
- False
Copper is found as the main mineral in basaltic lavas and as a reduced form of copper.
ChemistryGrade-7
- True
- False
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Sodium _____ is much less reactive than sodium.
- Brass
- Amalgam
- Bronze
- Type metal
Sodium _____ is much less reactive than sodium.
ChemistryGrade-7
- Brass
- Amalgam
- Bronze
- Type metal
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Which of the following has the mass number as 63.54 amu ?
- Silver
- Copper
- Gold
- Aluminium
Which of the following has the mass number as 63.54 amu ?
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- Silver
- Copper
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- Aluminium
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Compounds of silver, such as silver chloride and silver iodide are used in ___________.
- Envelop
- Photographic film
- Cupboards
- All the above
Compounds of silver, such as silver chloride and silver iodide are used in ___________.
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- Envelop
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Which of the following element is used in making jewellery ?
- Silver
- Gold
- Tin
- Aluminium
Which of the following element is used in making jewellery ?
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- Silver
- Gold
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