Which is amphoteric oxide?

1. ZnO

2. MnO-4

3. CO2

4. SiO

Subtopic:  Carbon Family - Preparations, Properties & Uses |
From NCERT
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Which is a true acid anhydride?

(1) Al2O3

(2) CO

(3) CaO

(4) CO2

Subtopic:  Compounds of Boron- Preparations, Properties & Uses |
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CCl4 does not show hydrolysis but SiCl4 is readily hydrolysed because:

(1) carbon cannot expand its octet but silicon can expand.

(2) electronegativity of carbon is higher than of silicon

(3) IP of carbon is higher than of silicon

(4) carbon forms double and triple bonds but not silicon

Subtopic:  Properties of Structure of SiO2 & Other Compounds |
 86%
From NCERT
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Which is formed when SiCl4 vapours are passed over hot Mg?

(1) SiCl2+MgCl2

(2) Si+MgCl2

(3) Mg2Si+Cl2

(4) MgSiCl6

Subtopic:  Properties of Structure of SiO2 & Other Compounds |
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Asbestors is chemically:

1. silicate of calcium and magnesium

2. calcium alumino silicate

3. magnesium alumino silicates

4. calcium silicate + calcium aluminates

Subtopic:  Properties of Structure of SiO2 & Other Compounds |
From NCERT
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Aqueous solution of sodium silicate is:

(1) acidic

(2) alkaline

(3) neutral

(4) insoluble

Subtopic:  Properties of Structure of SiO2 & Other Compounds |
 69%
From NCERT
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Quartz is made of silicon and oxygen joined in a network arrangement that is similar to:

1. Diamond

2. Graphite

3. O2

4. None of the above

Subtopic:  Compounds of Boron- Preparations, Properties & Uses |
 60%
From NCERT
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The product obtained when silica reacts with hydrogen fluoride is:

1. SiF4

2. H2SiF6

3. H2SiF4

4. H2SiF3

Subtopic:  Properties of Structure of SiO2 & Other Compounds |
From NCERT
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Silica reacts with Mg to form a magnesium compound (A). (A) react with dil. HCl and forms (B). (B) is:

(1) MgSiO

(2) MgO

(3) MgCl2

(4) SiCl4

Subtopic:  Properties of Structure of SiO2 & Other Compounds |
 69%
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Silica is reacted with sodium carbonate. Which is the gas liberated?

(1) CO

(2) O2

(3) O3

(4) CO2

Subtopic:  Properties of Structure of SiO2 & Other Compounds |
 72%
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