Tag: chemistry

Questions Related to chemistry

Which of the following metal is found in our body?

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

  1. Iron

  2. Calcium

  3. Potassium

  4. All of the above

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Correct Option: D
Explanation:

All the above metals are found in body and are required for normal functioning of our body. Iron is found in haemoglobin and myoglobin which are required for oxygen transport in the body. Calcium is found in the structure of bone and teeth. Also plays a role in the growth of nerve cells.

Common salt consists of which non-metal?

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

  1. Iodine

  2. Carbon

  3. Oxygen

  4. Sulphur

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Correct Option: A
Explanation:

Salt is a food that almost everyone eats throughout the day, and every day. Iodized salt (also spelled iodized salt) is table salt mixed with a minute amount of various salts of the element iodine. 

Copper metal is used in making:

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

  1. electric wires

  2. fuse wires

  3. filling cavity in teeth

  4. preparation of hydrogen

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Correct Option: A
Explanation:
Copper is good conductor of electricity. Because of that, it is used as an electric wire to conduct the electricity.

________ is called a space age metal and used in military jets and spacecrafts.

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

  1. Zinc

  2. Platinum

  3. Copper

  4. Titanium

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Correct Option: D
Explanation:

TItanium is known as the space age metal and  is expected to replace most of the metals used around the industries. However, its expensive and difficult mining process is keeping it from being used so commonly as aluminium or steel. Titanium is found to be stronger, durable and corrosion resistive in comparison to steel. It has the highest strength to weight ratio of all the metals. All these properties, along with its light weight, make it an ideal metal for space crafts and military jets. It is also used in making highly water - resistant diving watches.

Which of the following non-metal is commonly used for purifying water?

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

  1. Sulphur

  2. Oxygen

  3. Chlorine

  4. Xenon

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Correct Option: C
Explanation:

Chlorine is one of the most commonly used disinfectants for water disinfection. Chlorine can be applied for the deactivation of most microorganisms and it is relatively cheap. Although several methods eliminate disease-causing microorganisms in water, chlorination is the most commonly used. Chlorination is effective against many pathogenic bacteria, but at normal dosage rates it does not kill all viruses, cysts, or worms. When combined with filtration, chlorination is an excellent way to disinfect drinking water supplies.

Graphite is most commonly used in:

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

  1. pesticides

  2. pencil leads

  3. water purification

  4. fertilizers

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Correct Option: B
Explanation:

Cores of pencil are made of graphite which leaves grey or black marks that can be easily erased. Graphite pencils are useful for writing as well as drawing too. 

Liquid metals used for making thermometer is:

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

  1. zirconium

  2. mercury

  3. lead

  4. none of the above

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Correct Option: B
Explanation:

Mercury is the only liquid. Except mercury all metals are solids at room temperature. Mercury is used for making thermometer.

Which of the following metal is used in atomic energy and space projects?

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

  1. Titanium

  2. Zirconium

  3. Sodium

  4. All of above

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Correct Option: D
Explanation:

Titanium, sodium and zirconium metals are used in atomic energy and space science projects.

Tungsten filament is:

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

  1. non-polar covalent substance

  2. polar covalent substance

  3. ionic substance

  4. metallic substance

  5. noble gas

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Correct Option: D
Explanation:

Tungsten filament represents metallic substance.
Tungsten is a metal. Other examples of metals include iron, copper, aluminium, magnesium, sodium, lead, zinc etc.

Non-metal which is essential for our life and all living beings inhale it during breathing is :

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

  1. oxygen

  2. nitrogen

  3. hydrogen

  4. water

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Correct Option: A
Explanation:

An essential non metal used in breathing by all living beings is 'Oxygen'