8th Grade > Chemistry
MATERIALS METALS AND NON-METALS MCQs
Total Questions : 39
| Page 3 of 4 pages
Answer: Option B. ->
False
:
B
:
B
Non-metals do not displace hydrogen from acids. Only metals that are more reactive than hydrogen can.
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 C. ->
Carbon
:
C
:
C
Out of these only Carbon (C) is a non-metal whereas the others are all metals.
Answer: Option B. ->
Hydrogen is oxidised by nitric acid.
:
B
:
B
Most of the metals do not react with HNO3 because it is a strong oxidizing agent.
Since hydrogen is a reducing agent, nitric acid oxidises the hydrogen produced to water and itself undergoes reduction to give N2O, NO, NO2, N2 and NH3.
Hence, when metals (except Mn and Mg) are treated with nitric acid, hydrogen gas is not liberated.
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. ->
produces a ringing sound when beaten
:
A
:
A
Substances that produce a ringing sound when they are beaten are said to be sonorous. Metals are generally sonorous.
Answer: Option A. ->
Sodium is a very reactive metal and reacts vigorously at room temperature.
:
A
:
A
Sodium is highly reactive. It reacts vigorously with Oxygen and water. A lot of heat is generated in this reaction. It is therefore, stored in kerosene for safety reasons.
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. ->
Magnesium
:
B and C
According to the reactivity series of metals, magnesium and iron are more reactive compared to copper. Hence, they replace the copper from its salt. Whereas gold and silver are less reactive than copper, hence cannot react with copper sulphate.
:
B and C
According to the reactivity series of metals, magnesium and iron are more reactive compared to copper. Hence, they replace the copper from its salt. Whereas gold and silver are less reactive than copper, hence cannot react with copper sulphate.
Answer: Option A. ->
True
:
A
:
A
Metals are capable of producing a deep or ringing sound, Thus they are said to be sonorous.
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