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Science Olympiad Test: Metals and Non-Metals- 1 - Class 10 MCQ


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10 Questions MCQ Test Olympiad Preparation for Class 10 - Science Olympiad Test: Metals and Non-Metals- 1

Science Olympiad Test: Metals and Non-Metals- 1 for Class 10 2024 is part of Olympiad Preparation for Class 10 preparation. The Science Olympiad Test: Metals and Non-Metals- 1 questions and answers have been prepared according to the Class 10 exam syllabus.The Science Olympiad Test: Metals and Non-Metals- 1 MCQs are made for Class 10 2024 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Science Olympiad Test: Metals and Non-Metals- 1 below.
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Science Olympiad Test: Metals and Non-Metals- 1 - Question 1

Which of the following property is generally not shown by metals?

Detailed Solution for Science Olympiad Test: Metals and Non-Metals- 1 - Question 1

In general, metals are not dull instead they are shiny. Because they contain free electrons that vibrate when they come in contact with light. When the electrons vibrate, they produce their own light. This is reflected to create a shiny look of the metal.
But metals become dull only when they are exposed to the air for a while, the oxygen present in the air slowly combines with the metal to form a metal oxide. It deposits in layers on the surface of the metal which results in the dullness of metals.

Science Olympiad Test: Metals and Non-Metals- 1 - Question 2

The best conductor of electricity is

Detailed Solution for Science Olympiad Test: Metals and Non-Metals- 1 - Question 2

Metals are good conductors of electricity. silver is found in pure form from the earth. so  In the given options all are metals. Among them, silver is the best conductor of electricity after second best conductor of electricity is gold.

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Science Olympiad Test: Metals and Non-Metals- 1 - Question 3

Aluminium is used for making cooking utensils Which of the following properties of aluminium are responsible for the same?
(i) Good thermal conductivity
(ii) Good electrical conductivity
(iii) Ductility
(iv) High melting point

Detailed Solution for Science Olympiad Test: Metals and Non-Metals- 1 - Question 3
  • Aluminium is ductile and has a high electrical conductivity, which makes it unsuitable for utensil production.
  • Aluminium has a high melting point and good heat conductivity.
  • Copper, steel, and aluminium are the most popular metals used to make utensils.
  • Due to their ability to conduct heat, copper and aluminium are the most used materials.
Science Olympiad Test: Metals and Non-Metals- 1 - Question 4

Safety fuse wire is made of

Detailed Solution for Science Olympiad Test: Metals and Non-Metals- 1 - Question 4

An electrical fuse is a safety device in the circuit that protects electrical systems by breaking the connection when a short circuit is occurring. The fuse wire is made up of Sn (tin) and Pb (lead) alloy because of its high resistance and low melting. Point. The tin and lead alloy is a eutectic composition consisting of 62% and tin plus 38% lead, which melts at 1830C

Science Olympiad Test: Metals and Non-Metals- 1 - Question 5

When aluminium is added to sodium hydroxide solution

Detailed Solution for Science Olympiad Test: Metals and Non-Metals- 1 - Question 5

2Al + 2NaOH + 6H2​O → 2[Al(OH)4​] + 2Na+ + 3H2

Science Olympiad Test: Metals and Non-Metals- 1 - Question 6

Which of the following metal forms amphoteric oxide?

Detailed Solution for Science Olympiad Test: Metals and Non-Metals- 1 - Question 6

An amphoteric oxide is a substance that can chemically react as either acid or base. Aluminium oxide shows acid and basic properties of oxide so it is amphoteric.
Thus, Al2​O3​ entails the marking point at which a change over from a basic oxide to acidic oxide occurs.

Science Olympiad Test: Metals and Non-Metals- 1 - Question 7

18 carat gold contains

Detailed Solution for Science Olympiad Test: Metals and Non-Metals- 1 - Question 7

Caratage is the measurement of purity of gold alloyed with other metals. 24 carat is pure gold with no other metals. Low caratages contain less gold. 18 carat gold contain 75% of gold & 25% of other metals often, Copper/Silk.

Science Olympiad Test: Metals and Non-Metals- 1 - Question 8

Which one of the following metals does not react with cold as well as hot water?

Detailed Solution for Science Olympiad Test: Metals and Non-Metals- 1 - Question 8

Fe does not react with cold as well as hot water. It reacts only with steam.

Science Olympiad Test: Metals and Non-Metals- 1 - Question 9

Which one of the following four metals would be displaced from the solution of its salts by other three metals?

Detailed Solution for Science Olympiad Test: Metals and Non-Metals- 1 - Question 9

Because silver is a non-reactive metal it can be displaced easily.

  • Mg, Zn, or Cu metals would displace Ag from the solution of its salt.
  • The standard reduction potential for the half reaction Ag is the highest among the metals.
  • As a result, Ag+ ion has the greatest strength as an oxidising agent among the metals (ions).
  • The Ag + ion gains an electron while other metals loses.
Science Olympiad Test: Metals and Non-Metals- 1 - Question 10

Which of the following oxide(s) of iron would be obtained on prolonged reaction of iron with steam?

Detailed Solution for Science Olympiad Test: Metals and Non-Metals- 1 - Question 10

The chemical equation for the reaction of iron with steam can be written as
3Fe(s) + 4H2O → Fe3O4 + H2
Iron + Water → Iron (II, III) oxide + hydrogen gas
The formation of iron(II, III) oxide and hydrogen when red hot iron interacts with steam. When an iron metal interacts with steam, metal oxide and hydrogen gas are the products that are produced.

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