Tag: chemistry

Questions Related to chemistry

Which of the following metals is soft in nature?

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

  1. Platinum

  2. Iron

  3. Aluminium

  4. Sodium

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Correct Option: D
Explanation:

Sodium is the soft silvery metal at standard temperature and pressure. It can be readily cut with a knife as it is very soft. When freshly cut sodium has a bright silvery luster. If exposed to air the surface rapidly tarnishes, darkening at first and then forming a white coat of sodium hydroxide and sodium carbonate.

Metals have electropositive valency and non-metals have electronegative valency.

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

  1. True

  2. False

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Correct Option: A
Explanation:
Metals can donate electron so it has electropositue valency and non metals accecpts electron so it has electronegative valency.

Which of the following compounds is known as sugar of lead?

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

  1. $PbSO _4$

  2. $PbCO _3$

  3. $(CH _3COO) _2Pb$

  4. $PbCl _2$

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Correct Option: C
Explanation:

Lead (II)acetate also known as sugar of lead,salt of saturn and Goulard's powder is a white crystalline chemical compound with a sweetish taste. It is made by treating lead ($II$) oxide with acetic acid.

The brilliant shine over the freshly cut surface of metal is called lusture.

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

  1. True

  2. False

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Correct Option: A
Explanation:

The brilliant shine over the freshly cut surface of a metal is called lusture.

A material is brittle if when subjected to stress it breaks without significant plastic deformation.

Metals are usually ________ in nature.

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

  1. soft

  2. hard

  3. data insufficient

  4. none of above

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Correct Option: B
Explanation:

Metals are usually solid in nature. There is less metal that is soft in nature. Some metals are used to make items like coins because they are hard and will not wear away quickly. 


For example aluminium (which is shiny and white), gold (which is yellow and shiny), and silver and nickel (also white and shiny).

Explain lustre.

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

  1. Shining by reflecting light

  2. Deformation into thin sheets

  3. Deformation into rods

  4. Free electrons to conduct electricity and heat

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Correct Option: A
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.

Are metals sonorous?

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

  1. Yes

  2. No

  3. Maybe

  4. None of above

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Correct Option: A
Explanation:

Sonorous metals mean a deep, full, pleasing and imposing sound. It is one of the physical properties of a metal through which a sound is produced when metal is hit.

Are non-metals malleable?

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

  1. Yes

  2. No

  3. Maybe

  4. None of above

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Correct Option: B
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.

Which metal is soft in nature?

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

  1. Sodium

  2. Potassium

  3. Both A and B

  4. None of above

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Correct Option: C
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.

Which of the following is non-malleable?

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

  1. Sulphur

  2. Chlorine

  3. Xenon

  4. None of the above

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Correct Option: A,B,C
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.