If the seal is opened without cooling, the liquid ammonia suddenly vaporises and gushes out of the bottle with force. This may lead to serious accidents.
Thursday, September 24, 2020
Explain , Aerated water bottles are kept under water during summer why?
Aerated water contains CO2 dissolved in water. The solubility of gas decreases with rise in temperature. Thus, amount of free gas in bottle can increase in summer, which may result into increase in pressure and ultimately explosion. To avoid this they are kept under cold water.
Arrange the following in the increasing order of melting point of different types of crystalline solid (i) Covalent solid (ii) Metallic solid (iii) Molecular (iv) Ionic
Covalent > Ionic > Metallic > Molecular (∼ 4000 K) (∼ 1000 K) (880 -1000 K) (273- 600 K)
Why falling liquid drops are spherical?
This is due to property of surface tension possessed by the liquids.This makes the surface area minimum. For a given volume, sphere has minimum surface area.
Why diethyl ether has higher vapour pressure than ethyl alcohol at a particular temperature?
This is because the intermolecular forces of attraction in ethyl alcohol are stronger than those present in diethyl ether.
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