Metals and Non-metals Test

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Metals and Non-metals Test - 39

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Weekly Quiz Competition

Question 1
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Metals found in a combined state in the earth's crust are known as:

A
Native metal

B
Minerals

C
Substance

D
Element

Solution

The elements or compounds, which occur naturally in the earth’s crust, are known as minerals. Thus, Option $$B$$ is correct.
Question 2
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How do the atoms combine in $$CaCl_2$$ or Calcium Chloride?

A
By forming metallic bond

B
By forming co-ordinate covalent bond

C
By forming ionic bond

D
By forming covalent bond

Solution

An ionic bond is formed in a molecule when one atom in the molecule transfers one or more electrons from itself to its neighbouring atom in the molecule.
In this molecule, calcium transfers its two electrons to its two neighbouring chlorine atoms and hence $$CaCl_2$$ is an ionic compound.
Question 3
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Minerals that have a relatively high concentration of metal and can be extracted profitably from them are called:

A
Substance

B
Gold crust

C
Ores

D
Elements

Solution

The elements or compounds, which occur naturally in the earth’s crust, are known as minerals. At some places, minerals contain a very high percentage of a particular metal and the metal can be profitably extracted from it. These minerals are called ores.
Thus, option $$C$$ is correct.
Question 4
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Which of the following is the most important use of alloying?

A
Make it more beautiful

B
Gives desirable characteristics to the element

C
Provides resistance to corrosion

D
Both $$B$$ and $$C$$

Solution

Alloying is a very good method of improving the properties of a metal. It also helps in the prevention of corrosion. Thus, the correct answer is $$D$$
Question 5
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Stainless steel is made from:

A
Iron & copper

B
Iron, nickel and chromium

C
Iron & nickel

D
Iron & chromium

Solution

When iron is mixed with nickel and chromium, we get stainless steel, which is hard and does not rust.
Thus, option $$\text{B}$$ is correct.
Question 6
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Which of the following metals exist in free state?

A
Gold

B
Silver

C
Copper

D
All of the above

Solution

The metals at the bottom of the activity series are the least reactive. They are often found in a free state. For example, gold, silver, platinum, and copper are found in the free state.

Option D is correct.
Question 7
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Metals found at the top of the reactivity series are never found in free-state because

A
they are less reactive

B
they are highly reactive

C
they are moderately reactive

D
they are not at all reactive

Solution

Metals found at the top of the reactivity series are never found in free-state as they are very reactive. Example: K, Na, Ca, Mg, Al, etc.
Question 8
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Cinnabar is the ore of:

A
$$Zn$$

B
$$Cd$$

C
$$Hg$$

D
$$Ag$$

Solution

Cinnabar is the most common and is the chief ore of mercury with the formula $$HgS$$.
Question 9
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Which of the following are found in Earth's crust mainly as oxides, sulphides and carbonates?

A
Metals above in the activity series

B
Metals in the middle of the activity series

C
Metals at the bottom of the activity series

D
All of these

Solution

The metals in the middle of the activity series are moderately reactive. They are found in the earth’s crust mainly as oxides, sulphides, or carbonates. Thus, option $$B$$ is correct.
Question 10
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Which one of the following can't be drawn into wires?

A
$$Fe$$

B
$$Al$$

C
$$Cu$$

D
$$Cl$$

Solution

$$Fe, Al$$ and $$Cu$$ are metals. Metals show the property of being ductile. They can be drawn into wires. Also, they are malleable. They can be drawn to thin sheets. $$Cl$$ is non-metal and non-metals are non-ductile.

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Re-Attempt Weekly Quiz Competition

Metals and Non-metals Test - 39

Result

Metals and Non-metals Test - 39

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SHARING IS CARING

Question 1

Native metal

Minerals

Substance

Element

Solution

Question 2

By forming metallic bond

By forming co-ordinate covalent bond

By forming ionic bond

By forming covalent bond

Solution

Question 3

Substance

Gold crust

Ores

Elements

Solution

Question 4

Make it more beautiful

Gives desirable characteristics to the element

Provides resistance to corrosion

Both $$B$$ and $$C$$

Solution

Question 5

Iron & copper

Iron, nickel and chromium

Iron & nickel

Iron & chromium

Solution

Question 6

Gold

Silver

Copper

All of the above

Solution

Question 7

they are less reactive

they are highly reactive

they are moderately reactive

they are not at all reactive

Solution

Question 8

$$Zn$$

$$Cd$$

$$Hg$$

$$Ag$$

Solution

Question 9

Metals above in the activity series

Metals in the middle of the activity series

Metals at the bottom of the activity series

All of these

Solution

Question 10

$$Fe$$

$$Al$$

$$Cu$$

$$Cl$$

Solution

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