Compounds of Alkali Metals
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Chemistry
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9th - 10th Grade
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Hard
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7 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Why does lithium not form superoxides?
It has a large atomic size.
It has a strong positive field around its ion.
It forms stable peroxides instead.
It reacts too slowly with oxygen.
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What happens when alkali metal oxides dissolve in water?
They form carbonates.
They form acids.
They form salts.
They form hydroxides.
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the nature of alkali metal hydroxides?
Weak acids
Strong acids
Weak bases
Strong bases
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which alkali metal halide is known for its covalent nature?
Sodium chloride
Potassium iodide
Lithium chloride
Cesium bromide
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the trend in the melting points of alkali metal halides from fluorides to iodides?
Melting points remain constant.
Melting points decrease.
Melting points increase.
Melting points vary randomly.
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
How do alkali metals react with oxoacids?
They form oxides directly.
They replace only acidic hydrogen atoms.
They replace all hydrogen atoms.
They do not react with oxoacids.
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Why is lithium carbonate less stable to heat compared to other alkali metal carbonates?
It forms a stable oxide and carbon dioxide.
It does not react with heat.
It has a larger atomic size.
It has a high melting point.
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