Tag: chemistry

Questions Related to chemistry

A purple coloured non-metal forms a brown solution in alcohol which is applied on wounds as an antiseptic. The non-metal is :

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

  1. iodine

  2. bromine

  3. chlorine

  4. sulphur

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Correct Option: A
Explanation:

Iodine is a natural dark violet, non-metallic element that plays a key role in human metabolism. Iodine, for example, is slightly soluble in water and gives a yellowish-brown solution. Brown solutions are also formed with alcohol.
Iodine is usually used in an alcohol solution (called tincture of iodine) or as Lugol's iodine solution as a pre- and postoperative antiseptic. Some people do not recommend disinfecting minor wounds with iodine because of concern that it may induce scar tissue formation and increase healing time.

Non-metal which is used to sterilize water is :

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

  1. iodine

  2. bromine

  3. chlorine

  4. sulphur

Show answer
Correct Option: C
Explanation:

Chlorine is a non-metal which is used to disinfect water. 


Chlorine can be applied for the deactivation of most microorganisms like bacteria.

Hence the correct option is C.

A person working with phosphorus suffers from a disease in which bones decay. It is known as?

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

  1. Arthritis

  2. Phossy jaw

  3. Rickets

  4. Cancer

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Correct Option: B
Explanation:

A person working with phosphorus suffers from a disease in which bones decay. It is known as phossy jaw.

The oxides of nonmetal which is neutral is :

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

  1. $SO _2$

  2. $NO _2$

  3. $P _2O _3$

  4. $CO$

Show answer
Correct Option: D
Explanation:

Neutral oxides are the oxides which show neither basic nor acidic properties when they react with water and they do not form salts when reacted with acids or bases, e.g., carbon monoxide$ (CO)$,nitrous oxide$ (N _2O)$,nitric oxide $(NO),$ etc., are neutral oxides.

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.