List of top Chemistry Questions on p -Block Elements

Given below are two statements, one is labelled as Assertion $A$ and the other is labeled as Reason $R$
Assertion A : The alkali metals and their salts impart characteristic colour to reducing flame
Reason R : Alkali metals can be detected using flame tests
In the light of the above statements, choose the most appropriate answer from the options given below

Incorrect statement about Borazine is:

Given below are two statements, one is labelled as Assertion A and the other is labelled as Reason R
Assertion A: Beryllium has less negative value of reduction potential compared to the other alkaline earth metals
Reason R: Beryllium has large hydration energy due to small size of $Be ^{2+}$ but relatively large value of atomization enthalpy
In the light of the above statements, choose the most appropriate answer from the options given below

The Lewis acid character of boron tri halides follows the order :

Match List I with List II

Choose the correct answer from the options given below:

Which of the following represents the correct order of metallic character of the given elements?

Match List I with List II

LIST I		LIST II
A	Chlorophyll	1	$Na _2 CO _3$
B	Soda ash	2	$CaSO _4$
C	Dentistry, Ornamental work	3	$Mg ^{2+}$
D	Used in white washing	4	$Ca ( OH )_2$

Compound A reacts with $NH _4 Cl$ and forms a compound B Compound B reacts with $H _2 O$ and excess of $CO _2$ to form compound $C$ which on passing through or reaction with saturated $NaCl$ solution forms sodium hydrogen carbonate Compound $A , B$ and $C$, are respectively

Which one among the following metals is the weakest reducing agent?

Compound A reacts with $NH _4 Cl$ and forms a compound B.

Compound B reacts with $H _2 O$ and excess of $CO _2$ to form compound $C$ which on passing through or reaction with saturated $NaCl$ solution forms sodium hydrogen carbonate Compound $A , B$ and $C$, are respectively.

Sum of $\pi$-bonds present in peroxodisulphuric acid and pyrosulphuric acid is___________

The total number of acidic oxides from the following list is: $NO , N _2 O , B _2 O _3, N _2 O _5$, $CO , SO _3, P _4 O _{10}$

Match List I with List II

LIST I		LIST II
A	X_eF₄	I	See-saw
B	SF₄	II	Square planar
C	NH₄+	III	Bent T-shaped
D	BrF₃	IV	Tetrahedral

Choose the correct answer from the options given below :

$H_2O_2$ behave like reducing agent in which of the following reactions:

S₁: Be⁺² has higher SRP than other alkaline earth metals.
S₂: Be⁺² has higher hydration energy and greater △aH (atomisation enthalpy) than other alkaline earth metals.

Match List I with List II

LIST I Elements		LIST II Colour imparted to the flame
A	K	1	Brick Red
B	Ca	2	Violet
C	Sr	3	Apple Green
D	Ba	4	Crimson Red

Choose the correct answer from the options given below:

Match the terms in Column-I with their description in Column-II:

Column-I		Column-II
P	N₂O₅	(i)	N–N bond
Q	N₂O	(ii)	N–O–N bond
R	N₂O₄	(iii)	N=N / N≡N bond
S	NO₂	(iv)	N=O bond

XeF$_4$ reacts with SbF$_5$ to form:
\[ [\text{XeF}_m]^{n+}[\text{SbF}_y]^{z-} \] What is $m+n+y+z$?

If the formula of borax is $Na_2B_4Ox(OH)y.zH_2O$ , Find the value of x + y + z.

Number of P-O-P bonds in H₃PO₄, P₄O₁₀, (HPO₃)₃

Find out difference in oxidation state of Xe in completely Hydrolysed form of XeF₄ and XeF₆

What is the ratio of σ and pi bonds in pyrophosphoric acid ?