The p-Block Elements Test

Result

The p-Block Elements Test - 67

Score
-
out of -
Rank
-
out of -

TIME Taken - -

SHARING IS CARING

If our Website helped you a little, then kindly spread our voice using Social Networks. Spread our word to your readers, friends, teachers, students & all those close ones who deserve to know what you know now.

Weekly Quiz Competition

Question 1
1 / -0

$$1^\circ$$ alcohols preferably undergo dehydration in presence of $$Al_{2}O_{3}$$:

A
$$E_{1}$$

B
$$E_{2}$$

C
$$S_{N}1$$

D
$$S_{N}2$$

Solution

Primary alcohol dehydrates through the $$E_2$$ mechanism

Oxygen donates two electrons to a proton from sulfuric acid $$H_2SO_4$$,

forming an alkyloxonium ion.

Then the nucleophile $$H_2SO_4$$ back-side attacks one adjacent hydrogen and the alkyloxonium ion leaves in a concerted process, making a double bond.
Question 2
1 / -0

Most stable oxidation state of gold is:

A
+1

B
+3

C
+2

D
0
Question 3
1 / -0

What is the n factor or valancy factor of ozone during the change $$2$$O$$_3$$ $$\rightarrow$$ $$3$$O$$_2$$?

A
$$2$$

B
$$4$$

C
$$6$$

D
$$8$$

Solution
Question 4
1 / -0

Which is correct order of stability:

A
$${Tl}^{+}<{Tl}^{+3}$$

B
$${Tl}^{+}>{Tl}^{+3}$$

C
$${Ga}^{+}>{In}^{+}>{Tl}^{+}$$

D
$${Ga}^{+3}<{In}^{+3}<{Tl}^{+3}$$
Question 5
1 / -0

The correct B --- F bond length follows the sequence :

A
$${ BF }_{ 3 }\quad <\quad { BF }_{ 2 }{ OH }\quad <\quad { BF }_{ 2 }{ NH }_{ 2 }\quad <\quad { B{ F }_{ 4 }^{ - } }$$

B
$${ BF }_{ 2 }{ NH }_{ 2 }\quad <\quad { BF }_{ 2 }{ OH }\quad <\quad { BF }_{ 3 }\quad <{ BF }_{ 4 }^{ - }$$

C
$${ { BF }_{ 3 } }\quad <\quad { BF }_{ 4 }^{ - }\quad <\quad { BF }_{ 2 }{ OH }\quad <\quad { BF }_{ 2 }{ NH }_{ 2 }$$

D
$${ BF }_{ 3 }\quad <\quad { BF }_{ 2 }{ NH }_{ 2 }\quad <{ BF }_{ 2 }{ OH }\quad <\quad { BF }_{ 4 }^{ - }$$

Solution
Question 6
1 / -0

When Borax is heated with solid salt metal metaborate is produced. Which of the following reaction actually involve the metal metaborate formation?

A
Acid base reaction between metal oxide and $$B_2O_3$$

B
Oxidation reduction reaction between metal oxide and $$B_2O_3$$

C
Substitution reaction between $$NaBO_2$$ & metal oxide

D
Complex formation reaction between metal oxide and $$B_2O_3$$
Question 7
1 / -0

The oxidation state of the most electronegative element in the products of the reaction $${ BaO }_{ 2 }$$ with $${ H }_{ 2 }{ SO }_{ 4 }$$ are :

A
0 and -1

B
-2 and +1

C
-1 and -2

D
-2 and 0
Question 8
1 / -0

Heating of ammonium dichromate produces all these compounds except:

A
NH$$_{3}$$

B
H$$_{2}$$O

C
N$$_{2}$$

D
Cr$$_{2}$$O$$_{3}$$

Solution

Solid ammonium carbonate decomposes as it is heated.
Balanced equation:
$$(NH_4)_2Cr_2O_7 \rightarrow Cr_2O_3+N_2+H_2 O$$
Thus, ammonia $$(NH_3)$$ is not obtained as a product int the given reaction.
Question 9
1 / -0

In which of the following compounds $$B-F$$ bond length is shortest?

A
$${ BF }_{ 4 }^{ - }$$

B
$$BF_3$$ $$\leftarrow $$ $$NH_3$$

C
$$BF_3$$

D
$$BF_3$$ $$\leftarrow $$ $$N(CH_3)_{3}$$

Solution
Question 10
1 / -0

What is the general electronic configuration of $$p-block$$ elements?

A
$$\left( n \right) { s }^{ 2 }\left( n-1 \right) { p }^{ 1-6 }$$

B
$${ ns }^{ 2 }{ np }^{ 1-6 }$$

C
Both $$a$$ and $$b$$

D
None of these

User

Question Analysis

Correct -
Wrong -
Skipped -

My Perfomance

Score
-
out of -
Rank
-
out of -

Re-Attempt Weekly Quiz Competition

The p-Block Elements Test - 67

Result

The p-Block Elements Test - 67

Score

-

Rank

-

SHARING IS CARING

Question 1

$$E_{1}$$

$$E_{2}$$

$$S_{N}1$$

$$S_{N}2$$

Solution

Question 2

+1

+3

+2

0

Question 3

$$2$$

$$4$$

$$6$$

$$8$$

Solution

Question 4

$${Tl}^{+}<{Tl}^{+3}$$

$${Tl}^{+}>{Tl}^{+3}$$

$${Ga}^{+}>{In}^{+}>{Tl}^{+}$$

$${Ga}^{+3}<{In}^{+3}<{Tl}^{+3}$$

Question 5

$${ BF }_{ 3 }\quad <\quad { BF }_{ 2 }{ OH }\quad <\quad { BF }_{ 2 }{ NH }_{ 2 }\quad <\quad { B{ F }_{ 4 }^{ - } }$$

$${ BF }_{ 2 }{ NH }_{ 2 }\quad <\quad { BF }_{ 2 }{ OH }\quad <\quad { BF }_{ 3 }\quad <{ BF }_{ 4 }^{ - }$$

$${ { BF }_{ 3 } }\quad <\quad { BF }_{ 4 }^{ - }\quad <\quad { BF }_{ 2 }{ OH }\quad <\quad { BF }_{ 2 }{ NH }_{ 2 }$$

$${ BF }_{ 3 }\quad <\quad { BF }_{ 2 }{ NH }_{ 2 }\quad <{ BF }_{ 2 }{ OH }\quad <\quad { BF }_{ 4 }^{ - }$$

Solution

Question 6

Acid base reaction between metal oxide and $$B_2O_3$$

Oxidation reduction reaction between metal oxide and $$B_2O_3$$

Substitution reaction between $$NaBO_2$$ & metal oxide

Complex formation reaction between metal oxide and $$B_2O_3$$

Question 7

0 and -1

-2 and +1

-1 and -2

-2 and 0

Question 8

NH$$_{3}$$

H$$_{2}$$O

N$$_{2}$$

Cr$$_{2}$$O$$_{3}$$

Solution

Question 9

$${ BF }_{ 4 }^{ - }$$

$$BF_3$$ $$\leftarrow $$ $$NH_3$$

$$BF_3$$

$$BF_3$$ $$\leftarrow $$ $$N(CH_3)_{3}$$

Solution

Question 10

$$\left( n \right) { s }^{ 2 }\left( n-1 \right) { p }^{ 1-6 }$$

$${ ns }^{ 2 }{ np }^{ 1-6 }$$

Both $$a$$ and $$b$$

None of these

User

Question Analysis

My Perfomance

Score

-

Rank

-

Results Announcement on: coming Monday

Stay Tuned: We’ll update you on your result via email or SMS.