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Silicon compounds: silicates, silicones, zeolites

37 questions on Silicon compounds: silicates, silicones, zeolites from the p-Block Elements: Groups 13 and 14 chapter: 7 NEET level, 15 JEE Main, 15 JEE Advanced. Each one opens with its answer and solution.

Practice this topic All p-Block Elements: Groups 13 and 14 topics

The basic structural unit of all silicates is NEET level
The repeating unit of a linear silicone polymer made from dimethyldichlorosilane is NEET level
Silica (SiO2) is attacked by which one of the following acids? NEET level
Zeolites are three-dimensional aluminosilicates. A well-known industrial use of the zeolite ZSM-5 is NEET level
In the manufacture of linear silicones, the compound added to limit the chain length is JEE Main level
Which of the following represents a sheet (two-dimensional) silicate anion? JEE Main level
Which of the following statements about silicates are correct? JEE Main level
Assertion (A): SiCl4 is readily hydrolysed by water whereas CCl4 is not. Reason (R): Silicon has vacant d orbitals that can accept a lone pair from water, but c... JEE Main level
The cation-exchange property of aluminosilicate zeolites is best explained by JEE Main level
A mixture of 1 mol (CH3)2SiCl2 and 1 mol CH3SiCl3 is completely hydrolysed. The total number of moles of HCl liberated is JEE Main level
Which of the following statements about silicones are correct? JEE Main level
The cyclic silicate anion Si6O18^12- is built from six SiO4 tetrahedra, each sharing two oxygens with its neighbours. The number of non-bridging (terminal) oxyg... JEE Advanced level
A double-chain (band) silicate has the repeating anion Si4O11^6-. The number of oxygen atoms in the unit that are shared between two tetrahedra (bridging oxygen... JEE Advanced level
Which of the following statements about silicon carbide (carborundum) and related compounds are correct? JEE Advanced level
Silicon is made by heating silica with coke: SiO2 + 2C -> Si + 2CO. If 30.0 g of SiO2 (molar mass 60 g/mol) is heated with excess coke and the yield of Si is 80... JEE Advanced level
Hard water contains 100 mg of Ca^2+ per litre (Ca = 40, Na = 23). It is softened by passing it through sodium zeolite: Na2Z + Ca^2+ -> CaZ + 2Na+. The mass of N... JEE Advanced level
Which of the following statements comparing CO2 and SiO2 are correct? JEE Advanced level
A linear silicone is to be made by hydrolysis and condensation of a mixture of (CH3)2SiCl2 and (CH3)3SiCl so that every chain has, on average, 50 (CH3)2SiO unit... JEE Advanced level
The basic structural unit of all silicates is NEET level
Silicones are polymers whose repeating unit is NEET level
Sand and quartz consist mainly of NEET level
Silica is attacked by which one of the following acids? JEE Main level
Hydrolysis and condensation of which compound gives long linear silicone chains? JEE Main level
Zeolites are used as water softeners because JEE Main level
The anion of a single-chain silicate (each tetrahedron shares two corners) has the general formula JEE Main level
Ordinary soda-lime glass is made by fusing JEE Main level
Heating silica with excess coke in an electric furnace at about 2000-2500 K gives the very hard compound JEE Main level
Acidifying an aqueous solution of sodium silicate (water glass) with HCl gives a gelatinous precipitate of JEE Main level
Select the correct statement(s) about silicones. JEE Main level
Beryl contains the cyclic silicate anion Si6O18^12- in which every SiO4 tetrahedron shares exactly two corners with neighbours. The number of non-bridging (term... JEE Advanced level
Each SiO4 tetrahedron of a sheet silicate shares three of its four oxygen atoms with neighbours. The formula of the sheet anion per two silicon atoms is JEE Advanced level
A zeolite has the unit-cell composition Na12[(AlO2)12(SiO2)12].27H2O. If all its Na+ ions are exchanged by Ca^2+ ions from hard water, the number of Ca^2+ ions ... JEE Advanced level
Assertion (A): SiO2 is a high-melting solid whereas CO2 is a gas. Reason (R): Silicon forms strong ppi-ppi double bonds with oxygen, just as carbon does. JEE Advanced level
Select the correct statement(s) about silicate structures. JEE Advanced level
Select the correct statement(s) about zeolites. JEE Advanced level
Select the correct statement(s) about silicon chemistry. JEE Advanced level
25.8 g of dimethyldichlorosilane, (CH3)2SiCl2, is completely hydrolysed and condensed to the linear silicone [(CH3)2SiO]_n with 80 % overall yield. Use atomic m... JEE Advanced level