Tag: chemical properties and uses of metals and non-metals

Questions Related to chemical properties and uses of metals and non-metals

Clinical thermometers are made up of glass. The important characteristic(s) considered for this selection is/are:

chemistry metals chemical properties and uses of metals and non-metals introduction to metals physical properties of non-metals

  1. it is a bad conductor of heat

  2. it is transparent

  3. both A & B

  4. it is strong

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Correct Option: C
Explanation:
Clinical thermometers are made up of glass because glass has very low co efficient of thermal expansion it is a bad conductor of heat and it is transparent.

In which of the following, use of non metals is more as compared to metals?

chemistry metals chemical properties and uses of metals and non-metals introduction to metals physical properties of non-metals

  1. human body

  2. fertilisers

  3. crackers

  4. all of the above

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Correct Option: D
Explanation:

Human body if formed of many non metals Carbon, Nitrogen, Oxygen, Hydrogen, Sulphur, Phosphorus and a bit of Chlorine. 
Fertilizers are composed of Nitrogen,phosphorous,potassium-NPK
Crackers are formed of Phosphorous and sulphur.

Silver is used in making mirrors.

chemistry metals chemical properties and uses of metals and non-metals introduction to metals physical properties of non-metals

  1. True

  2. False

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Correct Option: A
Explanation:

Silver is used in mirror because its Low-density material so weight is comparatively lesser than the other white coloured metal. Also because of high reflection property of white colour and non-corrosive nature.

Aluminium foils are used to wrap food items.

chemistry metals chemical properties and uses of metals and non-metals introduction to metals physical properties of non-metals

  1. True

  2. False

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Correct Option: A
Explanation:

Aluminium foils are used to wrap food items

It is malleable means can change into sheet very easily.
Aluminium foil has smooth shiny surface. Due to which it reflects back the heat radiation emitted by the food. Hence food remains warm for a longer time.

The metal generally mixed with gold while making ornaments is:

chemistry metals chemical properties and uses of metals and non-metals introduction to metals physical properties of non-metals

  1. zinc

  2. iron

  3. silver

  4. copper

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Correct Option: D
Explanation:

Copper is metal generally mixed with gold while making ornament to strengthen ornaments.

So answer is D. 

Quick silver is now known as:

chemistry metals chemical properties and uses of metals and non-metals introduction to metals physical properties of non-metals

  1. lead

  2. mercury

  3. tin

  4. brass

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Correct Option: B
Explanation:

Quick silver is the chemical element mercury$(Hg)$. It was formerly known as hydrargyrum.

Sulphur is used in:

chemistry metals chemical properties and uses of metals and non-metals introduction to metals physical properties of non-metals

  1. welding

  2. electroplating

  3. vulcanising rubber

  4. the manufacture of paints

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Correct Option: C
Explanation:
Vulcanization is addition of sulphur in natural rubber by chemical process to improve its durability. 

Which of the following mixtures is used in the preparation of tips of match sticks?

chemistry metals chemical properties and uses of metals and non-metals introduction to metals physical properties of non-metals

  1. $S +K$

  2. $Sb _2S _3+S$

  3. $K _2Cr _2O _7+S+P$

  4. $P+K$

Show answer
Correct Option: B
Explanation:

The heads of safety matches contain antimony trisulfide $Sb _2S _3$, potassium chlorate, sulfur, powdered glass, inert fillers, and animal glue.

Hence option $B$ is correct.

Which element is an important component of transistors?

chemistry metals chemical properties and uses of metals and non-metals introduction to metals physical properties of non-metals

  1. sodium

  2. copper

  3. germanium

  4. radium

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Correct Option: C
Explanation:

Germanium metal is used as semiconductor in transistors and various others electronic devices. These days its production for use in semiconductor electronics is a very small fraction, only 2%.

The metal used for making radiation shield is:

chemistry metals chemical properties and uses of metals and non-metals introduction to metals physical properties of non-metals

  1. $Al$

  2. $Fe$

  3. $Zn$

  4. $Pb$

Show answer
Correct Option: D
Explanation:

Shielding reduces the intensity of radiation depending on thickness. A quantity known as the halving-thicknesses is used to calculate. The half value layer of lead is 1.0 cm.