The s-Block Elements Test 26

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The s-Block Elements Test 26

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Weekly Quiz Competition

Question 1
1 / -0

Which would be the best antifreeze to sprinkle on icy roads?

A
$$Urea$$

B
$$NaCI$$

C
$$CaC{l_2}$$

D
$$A{l_2}{(S{O_4})_3}$$

Solution
Question 2
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Alkali earth metal nitrate that doesn't crystalize with $$H_{2}O$$ molecules

A
$$Ba(NO_{3})_{2}$$

B
$$Sr(NO_{3})_{2}$$

C
$$Ca(NO_{3})_{2}$$

D
$$Mg(NO_{3})_{2}$$

Solution

Solution:- (A) $$Ba{\left( N{O}_{3} \right)}_{2}$$
$$Ba{\left( N{O}_{3} \right)}_{2}$$ does not crystallise with water molecules as moving down the group, the possibility of formation of hydrate decreases with the decrease in charge density.
Question 3
1 / -0

Which of the following is organometalic compound

A
Methyl lithium

B
Lithium methoxide

C
Lithium dimethyl amide

D
Lithium acetate

Solution

$$LiCH_3$$ have metal carbon bond so considered organometic compound and other do not have.
Question 4
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Metal $${\text{M + air}}\xrightarrow{\Delta }{\text{A}}\xrightarrow{{{{\text{H}}_{\text{2}}}{\text{O}}}}B\xrightarrow{{{\text{HCl}}}}{\text{White fumes}}$$; Metal $$M$$ can be:

A
$$\rm{ Li,\, Mg }$$

B
$$\rm{ Na,\, K }$$ or $$\rm{Mg}$$

C
$$\rm{ Li,\, Al }$$ or $$\rm{ K }$$

D
$$\rm{ Li,\, Na }$$ or $$\rm{ K }$$

Solution

metal is lithium and magnesium
Question 5
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Directions For Questions

The properties of lithium and beryllium and their compounds differ far from those of the other group 1 and 2 elements and compounds.
Lithium compounds may show closer similarities towards group 2 elements (particularly Mg) than they show towards their own group.
Similarly Be is also closer to Al.

...view full instructions

Which of the following property of Li and Be is different from the rest of the elements of their group ?

A
smaller size

B
Valence shell contains only one s and three- p-orbitals

C
Higher covalent character exhibit in their compounds

D
All of the above

Solution
Question 6
1 / -0

Dry slaked line on treating with chlorine gives?

A
slaked lime

B
Bleaching powder

C
Chlorinated calcium

D
None

Solution

$${Ca}{(OH)}_{2} + {Cl}_{2} \rightarrow CaO{Cl}_{2} + Ca{Cl}_{2} + HCl$$

When Dry slaked lime on treating with chlorine , Bleaching powder is formed
Question 7
1 / -0

Which of the following alkaline earth metal shows properties similar to $$Al$$

A
$$Be$$

B
$$Ca$$

C
$$Sr$$

D
$$Ba$$

Solution

Beryllium (Be) shows properties similar to $$Al$$.
This is because they show diagonal relationship. This diagonal relaitonship is due to the approxiamtely equal atomic and ionic radii of $$Be$$ and $$Al$$.
Question 8
1 / -0

Among the following metals, the most dense is:

A
osmium

B
chromium

C
platinum

D
gold

Solution

in periodic table Osmium and iridium are the most dense metals
Question 9
1 / -0

The melting points of (i) $$BeCl_2$$ (ii) $$CaCl_2$$ and (iii) $$HgCl_2$$ follows the order:

A
$$i < ii < iii$$

B
$$ii < i < iii$$

C
$$i < iii < ii$$

D
$$iii < i < ii$$

Solution
Question 10
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Which one of the following is true?

A
Lithium on direct combination with nitrogen from $$Li_3N$$.

B
Magnesium on direct combination with nitrogen from $$Mg_3N$$.

C
Both a and b

D
Lithium and magnesium form bicarbonates.

Solution

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Re-Attempt Weekly Quiz Competition

The s-Block Elements Test 26

Result

The s-Block Elements Test 26

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SHARING IS CARING

Question 1

$$Urea$$

$$NaCI$$

$$CaC{l_2}$$

$$A{l_2}{(S{O_4})_3}$$

Solution

Question 2

$$Ba(NO_{3})_{2}$$

$$Sr(NO_{3})_{2}$$

$$Ca(NO_{3})_{2}$$

$$Mg(NO_{3})_{2}$$

Solution

Question 3

Methyl lithium

Lithium methoxide

Lithium dimethyl amide

Lithium acetate

Solution

Question 4

$$\rm{ Li,\, Mg }$$

$$\rm{ Na,\, K }$$ or $$\rm{Mg}$$

$$\rm{ Li,\, Al }$$ or $$\rm{ K }$$

$$\rm{ Li,\, Na }$$ or $$\rm{ K }$$

Solution

Question 5

smaller size

Valence shell contains only one s and three- p-orbitals

Higher covalent character exhibit in their compounds

All of the above

Solution

Question 6

slaked lime

Bleaching powder

Chlorinated calcium

None

Solution

Question 7

$$Be$$

$$Ca$$

$$Sr$$

$$Ba$$

Solution

Question 8

osmium

chromium

platinum

gold

Solution

Question 9

$$i < ii < iii$$

$$ii < i < iii$$

$$i < iii < ii$$

$$iii < i < ii$$

Solution

Question 10

Lithium on direct combination with nitrogen from $$Li_3N$$.

Magnesium on direct combination with nitrogen from $$Mg_3N$$.

Both a and b

Lithium and magnesium form bicarbonates.

Solution

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