The p-Block Elements Test

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The p-Block Elements Test - 20

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Weekly Quiz Competition

Question 1
1 / -0

What is the atomic number (Z) of the noble gas that reacts with fluorine?

A
54

B
10

C
18

D
2

Solution

Atomic number 54 is for Xe.

It reacts with fluorine and forms compounds, like $$XeF_2$$, $$XeF_4$$

Option A is correct.
Question 2
1 / -0

The word Argon represents the term_______

A
Sun

B
Hidden

C
Lazy

D
Stranger

Solution

The word Argon represents the term Lazy.

Option C is correct.
Question 3
1 / -0

Which is called lazy gas?

A
Kr

B
Ar

C
He

D
Ne

Solution

Argon is lazy gas because during his experiments to remove all gases from air, Sir William Ramsay kept getting the same proportion of an inert gas left behind. He did a lot of experiments to make this gas react with most reactive substance like fluorine, potassium etc. but it did not react with anything. He named this gas argon from a Greek word 'Argos' which means lazy or inert or inactive.
Question 4
1 / -0

Viscosity is very low for?

A
Ar

B
Xe

C
He

D
Kr

Solution

Noble gases have low melting and boiling point and lowest boiling point among them is of $$He$$ ($$4.2K$$). This is because they have only type of inter-atomic interaction that is weak dispersion forces.
Question 5
1 / -0

The element that oxidizes water to $$\mathrm{O}_{2}$$ with a large evolution of heat is:

A
$$\mathrm{F}_{2}$$

B
$$\mathrm{Cl}_{2}$$

C
$$\mathrm{B}\mathrm{r}_{2}$$

D
$$I_{2}$$

Solution

$$F_2$$ is the most powerful oxidizing
agent and evolves large amount
of heat due to the formation of H - bond
with $$H_2O$$ ( It is also the most electronegative element )
Question 6
1 / -0

Halogens means:

A
ore forming elements

B
sea salt products

C
inert gases

D
rare gases

Solution

Sea salt $$\to$$ like $$Mgcl_{2},\ MgBr_{2}$$ have halogens. $$\therefore$$ Halogens are sea salt products
Question 7
1 / -0

Fluorine does not show positive oxidation states because:

A
it is most electronegative element

B
it forms only anions in ionic compounds

C
it cannot form multiple bonds

D
it shows non-bonded electron pair repulsion due to small size.

Solution

Fluorine is the most electronegative element so it cannot show positive oxidation state.
Question 8
1 / -0

Which is the lightest gas?

A
Helium

B
Oxygen

C
Hydrogen

D
Nitrogen

Solution

Atomic weight of hydrogen is least so it is the lightest gas.

Hydrogen dirigibles are able to float in the atmosphere
Question 9
1 / -0

Bond angle in $$\mathrm{P}_{4}$$ molecule is

A
$$60^{0}$$

B
$$90^{0}$$

C
$$120^{0}$$

D
$$109^{0}28'$$

Solution

Each face of the tetrahedron are equilateral.
Question 10
1 / -0

In Haber's process for the manufacture of ammonia, the catalyst used is :

A
finely divided nickel

B
finely divided molybdenum

C
finely divided iron

D
finely divided platinum

Solution

Finely divided iron is used as catalyst in the manufacture of ammonia by Haber's process

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Re-Attempt Weekly Quiz Competition

The p-Block Elements Test - 20

Result

The p-Block Elements Test - 20

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SHARING IS CARING

Question 1

54

10

18

2

Solution

Question 2

Sun

Hidden

Lazy

Stranger

Solution

Question 3

Kr

Ar

He

Ne

Solution

Question 4

Ar

Xe

He

Kr

Solution

Question 5

$$\mathrm{F}_{2}$$

$$\mathrm{Cl}_{2}$$

$$\mathrm{B}\mathrm{r}_{2}$$

$$I_{2}$$

Solution

Question 6

ore forming elements

sea salt products

inert gases

rare gases

Solution

Question 7

it is most electronegative element

it forms only anions in ionic compounds

it cannot form multiple bonds

it shows non-bonded electron pair repulsion due to small size.

Solution

Question 8

Helium

Oxygen

Hydrogen

Nitrogen

Solution

Question 9

$$60^{0}$$

$$90^{0}$$

$$120^{0}$$

$$109^{0}28'$$

Solution

Question 10

finely divided nickel

finely divided molybdenum

finely divided iron

finely divided platinum

Solution

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