CHEMISTRY THE P-BLOCK ELEMENTS-11th
QUIZ-11
Dear Readers,
IIT JEE exam which consists of JEE Main and JEE Advanced is one of the most important entrance exams for engineering aspirants. The exam is held for candidates who are aspiring to pursue a career in the field of engineering and technical studies.
Chemistry is important because everything you do is chemistry! Even your body is made of chemicals. Chemical reactions occur when you breathe, eat, or just sit there reading. All matter is made of chemicals, so the importance of chemistry is that it's the study of everything..
Chemistry is important because everything you do is chemistry! Even your body is made of chemicals. Chemical reactions occur when you breathe, eat, or just sit there reading. All matter is made of chemicals, so the importance of chemistry is that it's the study of everything..
Q1.In P4 (tetrahedral)
Solution
Each P is joined to three P
Each P is joined to three P
Q2.Carbon and silicon belong to group 14. What is the nature of carbide of silicon?
Solution
SiC- Covalent
SiC- Covalent
Q3.AlO2- is known as
Solution
Meta aluminate ion
Meta aluminate ion
Q4.Major minerals containing nitrogen are
Solution
KNO3,NaNO3
Nitrogen gas makes up about 78% of the atmosphere by volume. There are relatively major
minerals containing nitrogen as nitrates are 'saltpetre' (NaNO3) and KNO3
KNO3,NaNO3
Nitrogen gas makes up about 78% of the atmosphere by volume. There are relatively major
minerals containing nitrogen as nitrates are 'saltpetre' (NaNO3) and KNO3
Q5.Which of the following is/are paramagnetic?
NO2, NO, N2O4, N2O2, N2O5
Solution
NO and NO2 have unpaired electrons, thus paramagnetic
NO and NO2 have unpaired electrons, thus paramagnetic
Q6.Which of the following compounds is/are possible?
Solution
All of these
All of these
Q7.Which involves breaking of covalent bonds?
Solution
Melting of SiO2
Silica has a three-dimensional network structure. In silica, silicon is sp3- hybridized and is
thus linked to four oxygen atoms and each oxygen atom is linked to two silicon atoms
forming a three-dimensional giant molecule. This three-dimensional network structure imparts stability to SiO2crystal and hence a large amount of energy is
required to break the crystal resulting in high melting point.
And melting of this breaks covalent bonds between molecules.
Melting of SiO2
Silica has a three-dimensional network structure. In silica, silicon is sp3- hybridized and is
thus linked to four oxygen atoms and each oxygen atom is linked to two silicon atoms
forming a three-dimensional giant molecule. This three-dimensional network structure imparts stability to SiO2crystal and hence a large amount of energy is
required to break the crystal resulting in high melting point.
And melting of this breaks covalent bonds between molecules.
Q8.Which of the following is most acidic?
Solution
N2O5
As among N, P, As and Sb. the former has highest electronegativity (EN) so its oxide is most acidic.
As the electronegativity value of element increases. the acidic character of the oxide also increases.
N2O5
As among N, P, As and Sb. the former has highest electronegativity (EN) so its oxide is most acidic.
As the electronegativity value of element increases. the acidic character of the oxide also increases.
Q9.Select the correct statement(s)
Solution
All of the above are correct statements
All of the above are correct statements
Q10. In graphite, additional electrons are
Solution
Delocalised forming extended π-bonding system.
Here each carbon atom is in sp2 hybridised state and is thus attached to three other carbon atoms by three sigma bonds forming a hexagonal planar structure.
The fourth electron present in an unhybridised p−orbital of each carbon atom of a hexagonal unit then overlap with each other to form a pi bond.
Delocalised forming extended π-bonding system.
Here each carbon atom is in sp2 hybridised state and is thus attached to three other carbon atoms by three sigma bonds forming a hexagonal planar structure.
The fourth electron present in an unhybridised p−orbital of each carbon atom of a hexagonal unit then overlap with each other to form a pi bond.
