What is the most commonly used Substance in fluorescent tubes?
1). Sodium oxide and argon
2). Sodium vapour and neon
3). Mercury vapour and argon
4). Mercury oxide and neonv
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2. Question 4.37:Write the significance of a plus and a minus sign shown in representing the orbitals.
4. Why boiling point of water decreases at high altitudes?
5. Question 5.6:What is the role of desorption in the process of catalysis?
6. Which of the following is the petroleum wax ?
8. One of the constituents of tear gas is
9. The purity of gold is expressed in carats. The purest form of goldis.