Tag: chemistry

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Multiple choice chemistry metals physical properties of metals and non-metals some physical properties of metals general characteristics and uses of metals

Which of the following is not malleable?

  1. Sulphur

  2. Selenium

  3. Phosphorus

  4. All of the above
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Non-metals are not malleable. They are brittle and hence they break easily. Such non-metals cannot be deformed by a hammer or rolling. Hence, non-metals cannot be deformed to form thin sheets.

Multiple choice chemistry metals physical properties of metals and non-metals some physical properties of metals general characteristics and uses of metals

Which of the following non-metal can be malleable?

  1. Sulphur

  2. Phosphorus

  3. Nitrogen

  4. Graphite
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Graphite is a non-metal consisting of 3 carbon atoms. he weak attractions between the layers of atoms in graphite are easily broken. Therefore, graphite is soft and the layers can slide over each other.

Multiple choice chemistry metals physical properties of metals and non-metals some physical properties of metals general characteristics and uses of metals

Two substance silver and carbon are thrown into a furnace. Which will melt earlier?

  1. Silver

  2. Carbon

  3. Both will melt together

  4. None of these
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Silver is a metal with a relatively low melting point (approx 961 C), whereas carbon (in the form of graphite or diamond) has an extremely high melting point or sublimes at much higher temperatures. Therefore, silver will melt much earlier in a furnace.

Multiple choice chemistry metals physical properties of metals and non-metals some physical properties of metals general characteristics and uses of metals

Out of sulphur and gold, which will be have higher melting point?

  1. Sulphur

  2. Gold

  3. Both have equal melting point

  4. None of the above
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Gold is a transition metal with a melting point of approximately 1064 C. Sulphur is a non-metal with a much lower melting point of approximately 115 C.

Multiple choice chemistry metals physical properties of metals and non-metals some physical properties of metals general characteristics and uses of metals

Mark the incorrect statement(s).
a) Most of the metals are soft.
b) All metals are equally hard.
c) Sodium is a soft non-metal.

  1. a, b

  2. b, c

  3. a, c

  4. All of the above
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Most of the metals are hard. But all the metals are not equally hard. The hardness varies from metal to metal. Most of the metals like iron, copper etc. are very hard. Sodium, potassium are exceptions.