Silica
Trending Questions
- NaOH only
- Neither HF nor NaOH
- Both HF and NaOH
- HF only
Full Form of SIAL
- Each silicon atom is surrounded by four oxygen atoms and each oxygen atom is bonded to two silicon atoms
- Each silicon atom is surrounded by two oxygen atoms and each oxygen atom is bonded to two silicon atoms
- Silicon atom is bonded to two oxygen atoms
- There are double bonds between silicon and oxygen atoms
- H2
- Cl2
- NaOH
Silicon dioxide is formed by the reaction of
SiCl4+2H2O
SiO2+4HF
SiO2+NaOH
SiCl4+NaOH
Statement I: Si−Si bond is weaker then Si−O bond.
Statement II: Silicon forms double bonds with itself.
- Both Statement I and Statement II are correct and Statement II is the correct explanation of Statement I.
- Both Statement I and Statement II are correct but Statement II is not the correct explanation of Statement I.
- Statement I is true but Statement II is false.
- If Statement I and Statement II are both false.
C(OH)4 is unstable because a carbon atom cannot hold more than one -OH groups but Si(OH)4 is a stable compound because
C-O bond energy is low
Si-O bond energy is low
Si-O bond length is small
C-O bond energy is high
The composition of the common glass is
Na2O.CaO.6SiO2
Na2O.Al2O3.SiO2
CaO.Al2O3.SiO2
Na2O.CaO.6SiO2
C(OH)4 is unstable because a carbon atom cannot hold more than one -OH groups but Si(OH)4 is a stable compound because
C-O bond energy is low
C-O bond energy is high
Si-O bond energy is low
Si-O bond length is small
A. It is pure crystalline form of silica.
B. It is a tetrahedral polymer of SiO2
C. UV light can pass through quartz.
- A and B are correct
- B and C are correct
- A and C are correct
- All are correct
A. It is pure crystalline form of silica.
B. It is a tetrahedral polymer of SiO2
C. UV light can pass through quartz.
- A and B are correct
- B and C are correct
- A and C are correct
- All are correct
- HCl
- HNO3
- H2SO4
- HF
- CO2
- SO2
- CO
- SiO2
'Z' can also be prepared by the reaction
- SiO2+4HF→SiF2+2H2O
- Si+O2→SiO2
- K2SiF6→6KF+Si
- Si+2NaOH+H2→Na2SiO3+2H2
Shape of CO2& SiO2 respectively are
Linear & angular
Angular & tetrahedral
Linear & tetrahedral
Linear & linear
SiO2 reacts with:
Na2CO3
CO2
HF
HCl
- sp3
- sp2
- sp
- Trigonal planar
- Linear
- Tetrahedral
- Angular
Different forms of silica such as quartz, tridymite and cristobalite are as follows:
Quartz 870∘C⟶ Tridymite 1470∘C⇌ Cristobalite
(SiO2) (SiO2) (SiO2)
The structure possessed in them is:
Sheet silicate
Three-dimensional silicate
Chain silicate
Cyclic or ring silicate
Shape of CO2& SiO2 respectively are
Linear & angular
Angular & tetrahedral
Linear & linear
Linear & tetrahedral
A when added to silica gives B. A and B are:
HF, H2SiF4
HF, H2SiF6
HCl, H2SiCl6
HI, H2SiI6
The basic structure of silicate is:-
SiO2−4
SiO4−4
SiO2−2
None of these