The s-Block Elements Test 45

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The s-Block Elements Test 45

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Weekly Quiz Competition

Question 1
1 / -0

Which is not a similar characteristics about the electronic of Be, Mg, Ca?

A
All the atoms have pair of s-electrons in their outermost energy level

B
All the atoms contain a pair of p-electrons in their outermost energy level

C
All are alkaline earth metals

D
All are of second group of the periodic table
Question 2
1 / -0

When the $$Na$$ and $$Li$$ placed in dry air we get:

A
$$\mathrm { NaOH } , \mathrm { Na } _ { 2 } \mathrm { O } , \mathrm { Li } _ { 2 } \mathrm { O }$$

B
$$\mathrm { Na } _ { 2 } \mathrm { CO } _ { 3 } , \mathrm { Na } _ { 2 } \mathrm { O } _ { 2 } , \mathrm { Li } _ { 2 } \mathrm { O }$$

C
$$\mathrm { Na } _ { 2 } \mathrm { O } , \mathrm { Li } _ { 3 } \mathrm { N } , \mathrm { NH } _ { 3 }$$

D
$$\mathrm { Na } _ { 2 } \mathrm { O } , \mathrm { Li } _ { 2 } \mathrm { O } , \mathrm { Li } _ { 3 } \mathrm { N }$$

Solution
Question 3
1 / -0

Which element is likely to have an electronegativity similar to that of aluminum?

A
Barium

B
Beryllium

C
Magnesium

D
Strontium

Solution
Question 4
1 / -0

Which are correct match?
$$1$$. Eka silicon - Ba
$$2$$ Eka aluminium - Ga
$$3$$ Eka manganese - Tc
$$4$$ Eka scandium - B

A
$$2, 3$$

B
$$1, 2, 4$$

C
$$1, 4$$

D
All
Question 5
1 / -0

Beryllium and aluminium exhibit many properties which are similar. But, the two elements differ in:

A
exhibiting maximum covalency in compounds

B
forming polymeric hydrides

C
forming covalent halides

D
exhibiting amphoteric nature in their oxides.

Solution

Due to diagonal relationship, $$Be$$ and $$Al$$ exhibits similar properties But covalency of $$Be$$ is $$4$$ because it has an absence of d-orbital whereas, covalency of $$Al$$ is up to $$ 6$$ due to the presence of vacant $$d-$$orbital. Hence they differ in exhibiting the maximum covalency in compounds.
Question 6
1 / -0

When sodium is heated with moist air, the product obtained is:

A
$${Na}_{2}{O}_{2}$$

B
$${Na}_{2}{CO}_{3}$$

C
$$NaOH$$

D
$${Na}_{2}O$$
Question 7
1 / -0

Inter nuclear distance between two sodium atoms is 372pm. Covalent radius of sodium atom will be:

A
372pm

B
less than 186pm

C
greater than 186pm

D
186pm

Solution
Question 8
1 / -0

Both lithium and magnesium display several similar properties due to the diagonal relationship; however, the one which is incorrect is:

A
Both form basic carbonates.

B
Both form soluble bicarbonates.

C
Both form nitrides.

D
None of these.
Question 9
1 / -0

Select the correct order of ionic radii.

A
$$Li> F> Cl> Br$$

B
$$Li> I> F< Cl$$

C
$$I> Li< F< Cl$$

D
$$F< Cl> Br< I>Li$$
Question 10
1 / -0

Choose the incorrect statement:

A
Reducing power in aqueous solution is maximum for lithium metal

B
Electron affinity order: $$ O^+ > O >O^{2-}_2 > O^{2-} $$

C
Order of oxidation number of oxygen: $$ O_3 > KO_2 > BaO_2 >K_2 O $$

D
pH of aqueous solution: $$ LiCl > BeCl_2 > MgCl_2 >AlCl_3 $$

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Re-Attempt Weekly Quiz Competition

$$1$$.	Eka silicon - Ba
$$2$$	Eka aluminium - Ga
$$3$$	Eka manganese - Tc
$$4$$	Eka scandium - B

The s-Block Elements Test 45

Result

The s-Block Elements Test 45

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SHARING IS CARING

Question 1

All the atoms have pair of s-electrons in their outermost energy level

All the atoms contain a pair of p-electrons in their outermost energy level

All are alkaline earth metals

All are of second group of the periodic table

Question 2

$$\mathrm { NaOH } , \mathrm { Na } _ { 2 } \mathrm { O } , \mathrm { Li } _ { 2 } \mathrm { O }$$

$$\mathrm { Na } _ { 2 } \mathrm { CO } _ { 3 } , \mathrm { Na } _ { 2 } \mathrm { O } _ { 2 } , \mathrm { Li } _ { 2 } \mathrm { O }$$

$$\mathrm { Na } _ { 2 } \mathrm { O } , \mathrm { Li } _ { 3 } \mathrm { N } , \mathrm { NH } _ { 3 }$$

$$\mathrm { Na } _ { 2 } \mathrm { O } , \mathrm { Li } _ { 2 } \mathrm { O } , \mathrm { Li } _ { 3 } \mathrm { N }$$

Solution

Question 3

Barium

Beryllium

Magnesium

Strontium

Solution

Question 4

$$2, 3$$

$$1, 2, 4$$

$$1, 4$$

All

Question 5

exhibiting maximum covalency in compounds

forming polymeric hydrides

forming covalent halides

exhibiting amphoteric nature in their oxides.

Solution

Question 6

$${Na}_{2}{O}_{2}$$

$${Na}_{2}{CO}_{3}$$

$$NaOH$$

$${Na}_{2}O$$

Question 7

372pm

less than 186pm

greater than 186pm

186pm

Solution

Question 8

Both form basic carbonates.

Both form soluble bicarbonates.

Both form nitrides.

None of these.

Question 9

$$Li> F> Cl> Br$$

$$Li> I> F< Cl$$

$$I> Li< F< Cl$$

$$F< Cl> Br< I>Li$$

Question 10

Reducing power in aqueous solution is maximum for lithium metal

Electron affinity order: $$ O^+ > O >O^{2-}_2 > O^{2-} $$

Order of oxidation number of oxygen: $$ O_3 > KO_2 > BaO_2 >K_2 O $$

pH of aqueous solution: $$ LiCl > BeCl_2 > MgCl_2 >AlCl_3 $$

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