8th Grade > Chemistry
MATERIALS METALS AND NON-METALS MCQs
Total Questions : 39
| Page 2 of 4 pages
Answer: Option C. -> kerosene
:
C
Sodium metal is very reactive. It reacts vigorously with oxygen and water. A lot of heat is generated in the reaction. It is, therefore, stored in kerosene
:
C
Sodium metal is very reactive. It reacts vigorously with oxygen and water. A lot of heat is generated in the reaction. It is, therefore, stored in kerosene
Answer: Option C. -> Carbon
:
C
Out ofthese only Carbon (C)is anon-metal whereas the others are all metals.
:
C
Out ofthese only Carbon (C)is anon-metal whereas the others are all metals.
Answer: Option B. -> False
:
B
Non-metals do not displace hydrogen from acids. Only metals that are more reactive than hydrogen can.
:
B
Non-metals do not displace hydrogen from acids. Only metals that are more reactive than hydrogen can.
Answer: Option A. -> Sodium (Na)
:
A
Metals such as potassium and sodium react violently with cold water. The reaction is so violent and exothermic that the evolved hydrogen immediately catches fire.
:
A
Metals such as potassium and sodium react violently with cold water. The reaction is so violent and exothermic that the evolved hydrogen immediately catches fire.
Answer: Option B. -> Hydrogen is oxidised by nitric acid.
:
B
Most of the metals do not react with HNO3 because itis a strong oxidizing agent.
Since hydrogen is a reducing agent, nitric acid oxidises the hydrogen produced to water and itself undergoes reduction to giveN2O, NO, NO2, N2 andNH3.
Hence, when metals (except Mn and Mg) are treated with nitric acid, hydrogen gas is not liberated.
:
B
Most of the metals do not react with HNO3 because itis a strong oxidizing agent.
Since hydrogen is a reducing agent, nitric acid oxidises the hydrogen produced to water and itself undergoes reduction to giveN2O, NO, NO2, N2 andNH3.
Hence, when metals (except Mn and Mg) are treated with nitric acid, hydrogen gas is not liberated.
Answer: Option A. -> Sodium is a very reactive metal and reacts vigorously at room temperature.
:
A
Sodium is highly reactive. It reacts vigorously with Oxygen and water. A lot of heat is generated in thisreaction. It istherefore, storedin kerosene for safety reasons.
:
A
Sodium is highly reactive. It reacts vigorously with Oxygen and water. A lot of heat is generated in thisreaction. It istherefore, storedin kerosene for safety reasons.
Answer: Option A. -> True
:
A
Ductility is the property of being able to be made into thin wires. Gold is the one of the most ductile metal and the ductility of mercury is less compared to gold.
:
A
Ductility is the property of being able to be made into thin wires. Gold is the one of the most ductile metal and the ductility of mercury is less compared to gold.
Answer: Option A. -> Zinc
:
A
Zinc is a malleable metal and thus can be beaten into thin sheets. Phosphorus, sulphur and oxygen are all non-metals. Non metals are usually not malleable.
:
A
Zinc is a malleable metal and thus can be beaten into thin sheets. Phosphorus, sulphur and oxygen are all non-metals. Non metals are usually not malleable.
Answer: Option B. -> False
:
B
Usually, metals are lustrous and non-metals are non-lustrous. However, iodine is an exception to this rule as it is a lustrous non-metal.
:
B
Usually, metals are lustrous and non-metals are non-lustrous. However, iodine is an exception to this rule as it is a lustrous non-metal.
Answer: Option A. ->
Zinc
:
A
:
A
Zinc is a malleable metal and thus can be beaten into thin sheets. Phosphorus, sulphur and oxygen are all non-metals. Non metals are usually not malleable.
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