Question

4. Some properties of four elements W, X, Y and Z are listed.
1. W melts at 1410°C and forms an acidic oxide.
2. X has a high density and is easily drawn into wires.
3. Y acts as a catalyst and its oxide reacts with acids.
4. Z is a red-brown solid used to make alloys.
Which of the elements are metals? *

2, 3 and 4
2 and 3
2 and 4
1 and 3​

Answer 1

Answer:

I think it should be 2,3 & 4

Answer 2

Answer:

The correct answer for the metals is found to be the option (1) 2, 3 and 4.

Explanation:

• Metal oxides are always basic in nature. For example, magnesium oxide is a metal oxide. When water is added, it becomes basic (magnesium hydroxide, $Mg(OH)_2$). They tend to react with water to form a basic solution of  metal hydroxides. For example, $BaO$ is a basic oxide. It dissolves in water to form barium hydroxide, $Ba (OH)_2$.
• Ductility is a physical property of metal. In other words, when you pull the metal, it stretches instead of breaking. In other words, the ability of a material to undergo significant plastic deformation under tension before fracture occurs is called the ductile property of the material. Ductile materials include nickel, copper, and steel.
• Rare earth metals, Transition metals and other metals are used as catalysts. Almost all commonly found metal catalysts are those of metals in group VIII. These Metal catalysts are used for many processes such as hydrogenation, oxidation, isomerization, hydrolysis and other reactions.
• A metallic substance composed of two or more metals is an alloy (can be compound or  solution). The components of alloys are usually metals themselves, but non-metal carbon is an essential component of steel. Alloys are usually made by melting a mixture of ingredients.

Judging by these properties, we can say that the elements X, Y, and Z are all metals but W is not a metal.

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