Tag: general characteristics and uses of metals

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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

Explain lustre.

  1. Shining by reflecting light

  2. Deformation into thin sheets

  3. Deformation into rods

  4. Free electrons to conduct electricity and heat
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Lustre is the way light interacts with the surface of a crystal, rock, or mineral. There are various types of lustre like greasy lustre, metallic lustre, dull lustre etc.

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

Which metal is soft in nature?

  1. Sodium

  2. Potassium

  3. Both A and B

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

All the metals are hard in nature. However, both sodium and potassium metals are soft and can be cut using a knife. The bonding in these metals is weak and electrons are not located over a single atom but over a number of atoms.

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 non-malleable?

  1. Sulphur

  2. Chlorine

  3. Xenon

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

Sulphur, chlorine and xenon, all are $p-$block elements.

Element I.e sulphur, chlorine, and xenon posses properties of non-metal like a poor conductor of heat and electricity,  electrons are not free to move, exist in the gaseous state.We know that non-metal are non-malleable. 


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.