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Test: Metals - SSC CGL MCQ


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15 Questions MCQ Test General Awareness for SSC CGL - Test: Metals

Test: Metals for SSC CGL 2024 is part of General Awareness for SSC CGL preparation. The Test: Metals questions and answers have been prepared according to the SSC CGL exam syllabus.The Test: Metals MCQs are made for SSC CGL 2024 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Test: Metals below.
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Test: Metals - Question 1

Which metal is the best conductor of heat ?

Detailed Solution for Test: Metals - Question 1

Silver is regarded as the best conductor of heat among the metals. This property makes silver highly valuable in various industrial applications such as electronics and thermal coatings. The high thermal conductivity of silver enables efficient heat transfer, making it a crucial material in the production of heat-sensitive components and devices.

Test: Metals - Question 2

What unique property do sodium and potassium possess compared to other metals?

Detailed Solution for Test: Metals - Question 2

Sodium and potassium stand out from the other mentioned metals due to their softness, which allows them to be cut with a knife. This characteristic is a result of their relatively low hardness compared to typical metals. Their softness makes them easier to manipulate and shape for various applications, especially in industries where their unique properties are advantageous.

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Test: Metals - Question 3

At what temperature do caesium and gallium become liquid?

Detailed Solution for Test: Metals - Question 3

Caesium and gallium transition from solid to liquid states above 30°C. This property of being liquid at relatively low temperatures distinguishes them from most metals, which are solid at room temperature. Caesium and gallium's low melting points make them unique elements with interesting applications in various fields, such as research and specialized industries.

Test: Metals - Question 4

What is the purpose of storing alkali metals under kerosene or liquid paraffin?

Detailed Solution for Test: Metals - Question 4

Storing alkali metals such as lithium, sodium, potassium, rubidium, and caesium under kerosene or liquid paraffin is done to protect them from air. When exposed to air, alkali metals can react with the oxygen and moisture in the air, leading to unwanted chemical reactions. This protective measure helps maintain the purity and properties of the alkali metals.

Test: Metals - Question 5

How is metallic sodium primarily produced?

Detailed Solution for Test: Metals - Question 5

Metallic sodium is primarily produced by the electrolysis of a molten mixture of 40% sodium chloride and 60% calcium chloride in a Down's cell. This process involves passing an electric current through the molten mixture to separate sodium metal from the chloride compounds. The extracted metallic sodium is then collected for various industrial applications.

Test: Metals - Question 6

What is the main application of potassium superoxide (KO2)?

Detailed Solution for Test: Metals - Question 6

Potassium superoxide (KO2) is primarily used in applications where oxygen production is needed. It is commonly employed in space capsules, submarines, and breathing masks to generate oxygen and remove carbon dioxide and carbon monoxide from the air. This property makes it crucial for sustaining life in enclosed environments where oxygen supply is limited.

Test: Metals - Question 7

What is the common name for magnesium hydroxide, which is used as an antacid?

Detailed Solution for Test: Metals - Question 7

Magnesium hydroxide, known as Milk of Magnesia, is commonly used as an antacid to neutralize excess stomach acid and provide relief from indigestion and heartburn. It works by reducing the acidity in the stomach, thereby alleviating symptoms of acid-related conditions.

Test: Metals - Question 8

Which compound, when heated to 120°C, loses water of crystallization to form plaster of Paris?

Detailed Solution for Test: Metals - Question 8

Calcium sulphate, known as gypsum, partially loses its water of crystallization when heated to 120°C, transforming into plaster of Paris. Plaster of Paris is a versatile material used in various applications like building plaster, medical casts, and dental molds due to its ability to harden when mixed with water.

Test: Metals - Question 9

What is the primary use of barium sulphate (BaSO4)?

Detailed Solution for Test: Metals - Question 9

Barium sulphate (BaSO4) is primarily used as a white pigment, either alone or in combination with zinc sulphide to form lithopone. This compound is valued for its high opacity and brightness, making it a popular choice in various industries, including paints, coatings, and plastics.

Test: Metals - Question 10

What is the primary use of borax (Na2B4O7·10H2O) ?

Detailed Solution for Test: Metals - Question 10

Borax (Na2B4O7·10H2O) is primarily used in borax bead tests for qualitative analysis. This test is a method used in chemistry to detect the presence of certain metals in a given substance by observing the color of the borax bead when heated with the substance. It is a common procedure in qualitative inorganic analysis to identify the presence of various metal ions.

Test: Metals - Question 11

Which metal is known for its uses in making utensils, frames, bodies of automobiles, and aircraft?

Detailed Solution for Test: Metals - Question 11

Aluminium (Al) is known for its versatile uses in making utensils, frames, and bodies of automobiles and aircraft. Due to its lightweight nature and corrosion resistance, aluminium is a popular choice in various industries for manufacturing a wide range of products.

Test: Metals - Question 12

What is the primary function of titanium chloride (TiCl4) ?

Detailed Solution for Test: Metals - Question 12

Titanium chloride (TiCl4) is primarily used in making screens. This compound finds application in various industries for producing screens with specific properties suited for different purposes, such as filtration, separation, or protection.

Test: Metals - Question 13

What characterizes the behavior of metals in terms of electron transfer?

Detailed Solution for Test: Metals - Question 13

Metals exhibit an electropositive behavior by losing electrons to form positive ions. This characteristic is fundamental to understanding the reactivity and chemical properties of metals in various reactions. When metals lose electrons, they achieve a more stable electron configuration, leading to the formation of positively charged ions. This process is essential in the formation of metal compounds and their interactions with other elements.

Test: Metals - Question 14

De-icing roads, why is a sodium chloride/calcium chloride blend preferred over pure sodium chloride?

Detailed Solution for Test: Metals - Question 14

A sodium chloride/calcium chloride blend is preferred over pure sodium chloride for de-icing roads because it helps lower the environmental impact. These blends are less corrosive to infrastructure and vegetation compared to pure sodium chloride, making them a more environmentally friendly choice for de-icing purposes.

Test: Metals - Question 15

How is calcium carbide (CaC2) commonly utilized in industrial processes?

Detailed Solution for Test: Metals - Question 15

Calcium carbide (CaC2) is extensively used in industrial processes for the preparation of acetylene gas. Acetylene has various applications, including as a precursor in the synthesis of many organic compounds and as a fuel in welding and cutting processes due to its high flame temperature.

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