Metals and Non-metals Test

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Metals and Non-metals Test - 38

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Weekly Quiz Competition

Question 1
1 / -0

Cinnabar is _______ .

A
$$HgS$$

B
$$HgO$$

C
$$HgCl$$

D
$$HgO.HgCl$$

Solution

Cinnabar is the most common ore of mercury. It has a chemical formula $$ HgS $$, mercuric sulphide.
Question 2
1 / -0

Which of the following elements are present at the top of the reactivity series?

A
Sodium

B
Potassium

C
Calcium

D
Zinc

Solution

The metals sodium, potassium, calcium, aluminium etc. are present at the top of the reactivity series.

Hence, the correct option is $$D$$
Question 3
1 / -0

The following elements are listed in order of decreasing reactivity as they appear in the reactivity series.
$$\displaystyle Na, Ca, Mg, Zn, Fe, H, Cu, Hg, Ag, Au$$

The element that can displace all the elements in the series is :

A
$$\displaystyle Na$$

B
$$\displaystyle Au$$

C
$$\displaystyle H$$

D
$$\displaystyle Fe$$

E
$$\displaystyle Cu$$

Solution

$$Sodium$$ lies above in the reactivity series. Therefore, it can displace all the elements from the series.
Question 4
1 / -0

Which of the properties of metals listed below is not related to their shape or changing their shape?

A
Malleability

B
Ductility

C
Conductivity

D
None of these
Solution
Malleability and ductility are the properties that give an idea about their shape or change the shape of a metal.
Malleability is the property that metals can be beaten into thin sheets.
Ductility is the property of drawing them into thin wires.
Conductivity is the property in which the metal conducts electricity or heat, and is not related to the shape of the metals.
Question 5
1 / -0

Thermit reaction involves the reaction __________.

A
of $$Fe_2O_3$$ with $$Al$$ to form $$Fe$$ and $$Al_2O_3$$

B
of $$Fe$$ with $$Al_2O_3$$ to form $$Fe_2O_3$$ and $$Al$$

C
$$Cu_O$$ with $$Cu_2S$$ to form $$Cu$$ and $$SO_2$$

D
$$ZnS$$ with $$O_2$$ to form $$ZnO$$ and $$SO_2$$

Solution

Thermit reaction involves the reaction of $$Fe_2O_3$$ with $$Al$$ to form $$Fe$$ and $$Al_2O_3$$.

$$\displaystyle Fe_2O_3 + 2Al \rightarrow 2 Fe +Al_2O_3 + $$ $$heat$$
Question 6
1 / -0

When $$Cu_2S$$ is heated in air, the products obtained are _______ .

A
$$Cu_2O$$, $$SO_2$$ and $$Cu$$

B
$$Cu_2O$$ and $$CuO$$

C
$$Cu_2O$$, $$SO_3$$ and $$Cu$$

D
$$CuO$$, $$SO_2$$, and $$ Cu$$

Solution

When $$Cu_2S$$ is heated in air, the products obtained are $$Cu_2O$$, $$SO_2$$, and $$Cu$$.

$$2Cu_2S + 3O_2 \xrightarrow {\Delta} 2Cu_2O + 2SO_2$$

$$2Cu_2O + Cu_2S \xrightarrow {\Delta} 6Cu + SO_2$$
Question 7
1 / -0

When manganese dioxide is heated with aluminium powder, the products obtained are:

A
Mn, $$Al_2O_3$$ and heat

B
MnO and $$Al_2O_3$$

C
MnO, $$Al_2O_3$$ and heat

D
Mn, and $$Al_2O_3$$

Solution

When manganese dioxide is heated with aluminium powder, the products obtained are $$Mn$$, $$Al_2O_3$$ and heat.
$$\displaystyle 3MnO_2 + 4Al \rightarrow 3 Mn +2Al_2O_3 + $$ $$heat$$
Question 8
1 / -0

The following elements are listed in order of decreasing reactivity as they appear in the reactivity series.

$$\displaystyle Na, Ca, Mg, Zn, Fe, H, Cu, Hg, Ag, Au$$

Of the following, the element that does NOT react with dilute hydrochloric acid to produce hydrogen gas is _______.

A
$$\displaystyle Zn$$

B
$$\displaystyle Fe$$

C
$$\displaystyle Hg$$

D
$$\displaystyle Ca$$

E
$$\displaystyle Mg$$

Solution

Hg lies below hydrogen in the reactivity series. Therefore, Hg cannot replace hydrogen from $$HCl$$ and hydrogen gas is not released.
Question 9
1 / -0

During electrolysis of molten sodium chloride:

A
sodium is obtained at the cathode and chlorine is obtained at the anode.

B
hydrogen is obtained at the cathode and oxygen is obtained at the anode.

C
sodium is obtained at the anode and chlorine is obtained at the cathode.

D
hydrogen is obtained at the anode and oxygen is obtained at the cathode.

Solution

During electrolysis of molten $$NaCl$$, sodium metal is deposited at the cathode, whereas, chlorine is liberated at the anode. The reactions are:

At cathode: $$Na^+ + e^- \rightarrow Na$$
At anode: $$2Cl^- \rightarrow Cl_2 + 2e^-$$.
Question 10
1 / -0

Which of the following are found as sulphide ores?

A
$$Al,\ Hg,\ Pb,\ F$$

B
$$Fe,\ Zn,\ Pb$$

C
$$Hg,\ Pb,\ Na$$

D
$$F,\ Ca,\ Cu,\ Mg$$

Solution

The metals in the middle of the activity series (Zn, Fe, Pb, etc.) are moderately reactive. They are found in the earth’s crust mainly as oxides, sulphides or carbonates. Hence, option $$B$$ is correct.

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Metals and Non-metals Test - 38

Result

Metals and Non-metals Test - 38

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Question 1

$$HgS$$

$$HgO$$

$$HgCl$$

$$HgO.HgCl$$

Solution

Question 2

Sodium

Potassium

Calcium

Zinc

Solution

Question 3

$$\displaystyle Na$$

$$\displaystyle Au$$

$$\displaystyle H$$

$$\displaystyle Fe$$

$$\displaystyle Cu$$

Solution

Question 4

Malleability

Ductility

Conductivity

None of these

Solution

Question 5

of $$Fe_2O_3$$ with $$Al$$ to form $$Fe$$ and $$Al_2O_3$$

of $$Fe$$ with $$Al_2O_3$$ to form $$Fe_2O_3$$ and $$Al$$

$$Cu_O$$ with $$Cu_2S$$ to form $$Cu$$ and $$SO_2$$

$$ZnS$$ with $$O_2$$ to form $$ZnO$$ and $$SO_2$$

Solution

Question 6

$$Cu_2O$$, $$SO_2$$ and $$Cu$$

$$Cu_2O$$ and $$CuO$$

$$Cu_2O$$, $$SO_3$$ and $$Cu$$

$$CuO$$, $$SO_2$$, and $$ Cu$$

Solution

Question 7

Mn, $$Al_2O_3$$ and heat

MnO and $$Al_2O_3$$

MnO, $$Al_2O_3$$ and heat

Mn, and $$Al_2O_3$$

Solution

Question 8

$$\displaystyle Zn$$

$$\displaystyle Fe$$

$$\displaystyle Hg$$

$$\displaystyle Ca$$

$$\displaystyle Mg$$

Solution

Question 9

sodium is obtained at the cathode and chlorine is obtained at the anode.

hydrogen is obtained at the cathode and oxygen is obtained at the anode.

sodium is obtained at the anode and chlorine is obtained at the cathode.

hydrogen is obtained at the anode and oxygen is obtained at the cathode.

Solution

Question 10

$$Al,\ Hg,\ Pb,\ F$$

$$Fe,\ Zn,\ Pb$$

$$Hg,\ Pb,\ Na$$

$$F,\ Ca,\ Cu,\ Mg$$

Solution

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