UPSC NDA I 2011 General Ability Paper
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Question : 144 of 150
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Which of the statements about glass are correct?
1. Glass is a super-cooled liquid having infinite viscosity
2. Violet coloured glass is obtained by addingMnO 2
3. Glass is a man made silicate
4. Glass is a crystalline substance
Select the correct answer using the code given below:
1. Glass is a super-cooled liquid having infinite viscosity
2. Violet coloured glass is obtained by adding
3. Glass is a man made silicate
4. Glass is a crystalline substance
Select the correct answer using the code given below:
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