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On fusion of a mixture of Na-2CO3 and C...

On fusion of a mixture of `Na-2CO_3` and ` CaCO_3` with silica at `1500^@C`, a liquid consisting of silicatees of sdium and calcium is formed. On cooling . Liquid become viscous and eventually ceasesto flow . It becomes solid and is known as flass. By varying the proportions of the three basic ingredients and by adding other substances, the properties of glass can be altered, Glass can be represented as `R_2 O. MO.6SiO_2`, where `R= Na` or `K, M = CaBa, Zn` or `pbSiO_2` may be replaced by `Akl_2 O_3 , b_2 O_3` or `P_2 O_5`. Colourd glasses are obtained by adding certain metallic oxdes or salts in the fused mass, Glass is attached by `HF` and this property is used to make marking on the galss , This is known as etching . The glass on rapid coolling becomes brittle and fragile . The artciles of glass are cooled neither slowly nor very rapidly . The process of graducal cooling of flass iscalled annealing .
Annealing is .

A

Slow and gradual cooling

B

Rapid cooling

C

Cooling by water

D

Slow cooling

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The correct Answer is:
A
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On fusion of a mixture of Na-2CO_3 and CaCO_3 with silica at 1500^@C , a liquid consisting of silicatees of sdium and calcium is formed. On cooling . Liquid become viscous and eventually ceasesto flow . It becomes solid and is known as flass. By varying the proportions of the three basic ingredients and by adding other substances, the properties of glass can be altered, Glass can be represented as R_2 O. MO.6SiO_2 , where R= Na or K, M = CaBa, Zn or pbSiO_2 may be replaced by Akl_2 O_3 , b_2 O_3 or P_2 O_5 . Colourd glasses are obtained by adding certain metallic oxdes or salts in the fused mass, Glass is attached by HF and this property is used to make marking on the galss , This is known as etching . The glass on rapid coolling becomes brittle and fragile . The artciles of glass are cooled neither slowly nor very rapidly . The process of graducal cooling of flass iscalled annealing . Ordinary flass is .

On fusion of a mixture of Na-2CO_3 and CaCO_3 with silica at 1500^@C , a liquid consisting of silicatees of sdium and calcium is formed. On cooling . Liquid become viscous and eventually ceasesto flow . It becomes solid and is known as flass. By varying the proportions of the three basic ingredients and by adding other substances, the properties of glass can be altered, Glass can be represented as R_2 O. MO.6SiO_2 , where R= Na or K, M = CaBa, Zn or pbSiO_2 may be replaced by Akl_2 O_3 , b_2 O_3 or P_2 O_5 . Colourd glasses are obtained by adding certain metallic oxdes or salts in the fused mass, Glass is attached by HF and this property is used to make marking on the galss , This is known as etching . The glass on rapid coolling becomes brittle and fragile . The artciles of glass are cooled neither slowly nor very rapidly . The process of graducal cooling of flass iscalled annealing . Glass is .

On fusion of a mixture of Na-2CO_3 and CaCO_3 with silica at 1500^@C , a liquid consisting of silicatees of sdium and calcium is formed. On cooling . Liquid become viscous and eventually ceasesto flow . It becomes solid and is known as flass. By varying the proportions of the three basic ingredients and by adding other substances, the properties of glass can be altered, Glass can be represented as R_2 O. MO.6SiO_2 , where R= Na or K, M = CaBa, Zn or pbSiO_2 may be replaced by Akl_2 O_3 , b_2 O_3 or P_2 O_5 . Colourd glasses are obtained by adding certain metallic oxdes or salts in the fused mass, Glass is attached by HF and this property is used to make marking on the galss , This is known as etching . The glass on rapid coolling becomes brittle and fragile . The artciles of glass are cooled neither slowly nor very rapidly . The process of graducal cooling of flass iscalled annealing . Blue collour can be imparted to the flass by.

On fusion of a mixture of Na-2CO_3 and CaCO_3 with silica at 1500^@C , a liquid consisting of silicatees of sdium and calcium is formed. On cooling . Liquid become viscous and eventually ceasesto flow . It becomes solid and is known as flass. By varying the proportions of the three basic ingredients and by adding other substances, the properties of glass can be altered, Glass can be represented as R_2 O. MO.6SiO_2 , where R= Na or K, M = CaBa, Zn or pbSiO_2 may be replaced by Akl_2 O_3 , b_2 O_3 or P_2 O_5 . Colourd glasses are obtained by adding certain metallic oxdes or salts in the fused mass, Glass is attached by HF and this property is used to make marking on the galss , This is known as etching . The glass on rapid coolling becomes brittle and fragile . The artciles of glass are cooled neither slowly nor very rapidly . The process of graducal cooling of flass iscalled annealing . A special type of glass which contains cerium oxide and does not allow the passage of ultraviolet rays is called .

On fusion of a mixture of Na-2CO_3 and CaCO_3 with silica at 1500^@C , a liquid consisting of silicatees of sdium and calcium is formed. On cooling . Liquid become viscous and eventually ceasesto flow . It becomes solid and is known as flass. By varying the proportions of the three basic ingredients and by adding other substances, the properties of glass can be altered, Glass can be represented as R_2 O. MO.6SiO_2 , where R= Na or K, M = CaBa, Zn or pbSiO_2 may be replaced by Akl_2 O_3 , b_2 O_3 or P_2 O_5 . Colourd glasses are obtained by adding certain metallic oxdes or salts in the fused mass, Glass is attached by HF and this property is used to make marking on the galss , This is known as etching . The glass on rapid coolling becomes brittle and fragile . The artciles of glass are cooled neither slowly nor very rapidly . The process of graducal cooling of flass iscalled annealing . The acid that cannot be stroed in galss is .

Mercury does not wet glass. This is the property of liquid known as

Glass is an extremely. Viscous liquid comment .

Liquids and gases are commonly known as fluids. Compare their properties and show that they can flow easily.

CENGAGE CHEMISTRY-P-BLOCK GROUP 14 - CARBON FAMILY-Exercises (Linked Comprehension)
  1. On fusion of a mixture of Na-2CO3 and CaCO3 with silica at 1500^@C, a...

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  2. On fusion of a mixture of Na-2CO3 and CaCO3 with silica at 1500^@C, a...

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  3. On fusion of a mixture of Na-2CO3 and CaCO3 with silica at 1500^@C, a...

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  4. On fusion of a mixture of Na-2CO3 and CaCO3 with silica at 1500^@C, a...

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  5. On fusion of a mixture of Na-2CO3 and CaCO3 with silica at 1500^@C, a...

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  6. Silicones are sunthetic polyners conitainging repeated R2 SiO units . ...

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  7. Silicones are sunthetic polyners conitainging repeated R2 SiO units . ...

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  8. The name 'silica' covers an entire froup of minerals which have the ge...

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  9. The name 'silica' covers an entire froup of minerals which have the ge...

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  10. The name 'silica' covers an entire froup of minerals which have the ge...

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  11. In some foam-type fre extinguishers, the treactants are Al2 (SO4)3 (aq...

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  12. In some foam-type fre extinguishers, the treactants are Al2 (SO4)3 (aq...

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  13. In some foam-type fre extinguishers, the treactants are Al2 (SO4)3 (aq...

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  14. CO2 and H2 O absorbs strongly in the infrared rrgion and its presence ...

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  15. CO2 and H2 O absorbs strongly in the infrared rrgion and its presence ...

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  16. CO2 and H2 O absorbs strongly in the infrared rrgion and its presence ...

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  17. CO2 and H2 O absorbs strongly in the infrared rrgion and its presence ...

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  18. In the first biological applicativon of bucky ball , chemists at the U...

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  19. In the first biological applicativon of bucky ball , chemists at the U...

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  20. In the first biological applicativon of bucky ball , chemists at the U...

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