The s-Block Elements Test 16

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The s-Block Elements Test 16

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Weekly Quiz Competition

Question 1
1 / -0

The close resemblance between the properties of an element of 2nd period with those of the element of 3rd period belonging to the next group is called:

A
periodicity

B
periodic trend

C
diagonal relationship

D
group trend

Solution

Option $$(C)$$ is correct.
The close resemblance between the properties of an element of 2nd period with those of the element of 3rd period belonging to the next group is called diagonal relationship.
These pairs (lithium and magnesium, beryllium and aluminium, boron and silicon etc.) exhibit similar properties.
Question 2
1 / -0

Diagonal relationship is due to:

A
identical ionization potential

B
identical electron negativity

C
identical sizes of ions

D
same valence shell configuration

Solution

Option $$(C)$$ is correct.
The diagonal relationship is due to identical sizes of ions.
On moving rightward a period of the periodic table, the size of the atoms decreases, and on moving down a group the size of the atoms increases. Similarly, on moving rightward a period, the elements become more electronegative, whereas on moving down the group the element becomes more positive. These two factors work in opposite direction. Hence the elements that are present diagonally to each other have similar properties like atomic size, electronegativity, density, chemical properties of compounds.
Question 3
1 / -0

Which of the given alkaline earth metal is hardest of all alkaline earth metals?

A
Mg

B
Ca

C
Be

D
Sr

Solution

Option $$(C)$$ is correct.
$$Be$$ is hardest of all alkaline earth metals.
Beryllium is a hard, brittle metal with a greyish-white surface.It has a high heat capacity (it can store heat) and heat conductivity (it can transfer heat efficiently).
Question 4
1 / -0

Compounds of ________ have a low melting point and are soluble in organic solvents.

A
beryllium

B
magnesium

C
calcium

D
none of these

Solution

Option $$(A)$$ is correct.
Compounds of beryllium have a low melting point and are soluble in organic solvents due to the small size of beryllium ion and high size/charge ratio of a beryllium ion.These compounds are more covalent, stable, stronger Lewis acids and more soluble than those of remaining group 2 cations.
Question 5
1 / -0

Among the ions present which is maximum in a normal human body?

A
Potassium

B
Sodium

C
Iron

D
Copper

Solution

Option $$(A)$$ is correct.
Potassium ions is present maximum in normal human body.
Almost 99% of the mass of the human body is made up of six elements: oxygen, carbon, hydrogen, nitrogen, calcium, and phosphorus. Only about 0.85% is composed of another five elements: potassium, sulfur, sodium, chlorine, and magnesium. Human body is composed of 0.4% potassium.
Question 6
1 / -0

Which one of the following pairs of elements does not have diagonal relationship?

A
$$Li$$ and $$Mg$$

B
$$Be$$ and $$Al$$

C
$$B$$ and $$Si$$

D
$$Be$$ and $$Na$$

Solution

Option $$(D)$$ is correct.
$$Be$$ and $$Na$$ does not have diagonal relationship.
A diagonal relationship is said to exist between certain pairs of diagonally adjacent elements in the second and third periods of the periodic table. These pairs (lithium and magnesium, beryllium and aluminium, boron and silicon etc.) exhibit similar properties.
Question 7
1 / -0

A typical $$70$$ kg man constitutes $$X$$ kg of sodium and $$Y$$ kg of potassium?

A
$$x=90,\ y=70$$

B
$$x=90,\ y=170$$

C
$$x=70,\ y=90$$

D
$$x=170,\ y=90$$

Solution

Option $$(B)$$ is correct.
A typical 70 $$kg$$ man constitutes 90 $$kg$$ of sodium and 170 $$kg$$ of potassium.
Question 8
1 / -0

$$Li$$ and $$Mg$$ resembles each other because

A
both are s-block elements

B
both are metals

C
both have almost same periodic properties

D
they have same electronic configuration

Solution

Due to its small size, lithium differs from other alkali metals but resembles with Mg as its size and other periodic properties are closer to Mg. Its resemblance with Mg is known as diagonal relationship.
Question 9
1 / -0

Correct relation for the size of $$Li$$ and $$Mg$$ is:

A
$$Mg>>Li$$

B
$$Mg>Li$$

C
$$Mg=Li$$

D
$$Mg<Li$$

Solution

Size of Mg is less than that of Li because of the $$Z_{eff}$$ of Mg. As the protons are added, electrons are attracted with a greater strength towards the core, making the radius of Mg smaller.
Question 10
1 / -0

Which of the following element participate in oxidation of glucose to form ATP?

A
Calcium

B
Sodium

C
Magnesium

D
Potassium

Solution

Option $$(D)$$ is correct.
Potassium participates in the oxidation of glucose to form ATP through ATP-sensitive potassium channel.

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The s-Block Elements Test 16

Result

The s-Block Elements Test 16

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SHARING IS CARING

Question 1

periodicity

periodic trend

diagonal relationship

group trend

Solution

Question 2

identical ionization potential

identical electron negativity

identical sizes of ions

same valence shell configuration

Solution

Question 3

Mg

Ca

Be

Sr

Solution

Question 4

beryllium

magnesium

calcium

none of these

Solution

Question 5

Potassium

Sodium

Iron

Copper

Solution

Question 6

$$Li$$ and $$Mg$$

$$Be$$ and $$Al$$

$$B$$ and $$Si$$

$$Be$$ and $$Na$$

Solution

Question 7

$$x=90,\ y=70$$

$$x=90,\ y=170$$

$$x=70,\ y=90$$

$$x=170,\ y=90$$

Solution

Question 8

both are s-block elements

both are metals

both have almost same periodic properties

they have same electronic configuration

Solution

Question 9

$$Mg>>Li$$

$$Mg>Li$$

$$Mg=Li$$

$$Mg<Li$$

Solution

Question 10

Calcium

Sodium

Magnesium

Potassium

Solution

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