If the stopper if a bottle has stuck, sometimes it may be removed by heating the neck, why ?1 1871
Why does the snow on the mountains not melt all at once, not changed into water very slowly?3 6438
Why does the water in tanks and ponds not freeze in winter ?1 2522
Why metallic tools used by blacksmiths have wooden handles ?1 1849
Why do clothes dry quicker in wind than in still air ?1 2269
Why is clinical thermometer used in preference to and ordinary Fahrenheit thermometer ?1 2319
When we pour into a tumble, bubbles ate seen outside why?1 2052
Why do woolen clothes keep us warm in winter ?29 94595
Why dies the water boil below 100 o C on the top of a mountain ?3 3029
Why does water boil above 100 o C in mines ?2 2659
Why can?t the meat and dal( pulses ) be cooled well on the top of high mountains ?1 2127
When we heat one end of and iron bar, the other end also gets heated up why ?1 2260
The heat of the sun reaches us and the intervening air is not heated up Why ?2 2932
Why is a vessel of water heats more quickly, when heat is applied at the bottom than it is heated at the top?1 2159
Why is the bottom of a kettle blackened and top polished?1 2330
What is the chemical formula of alum?
Do all explosions produce carbon dioxide or carbon monoxide?
What is pka of acid?
which gas is used in preaparation of bit salt
What is the resulting solution when benzene and toluene are mixed ?
Explain how buffer works?
What is meant by ph of a solution?
Cholesterol is a compound suspected of causing hardening of the arteries. The formula of cholesterol is C27H46O. a. A sample of cholesterol is isolated from the arterial lining of a 60-year-old American male. What is the formula of this compound? b. Cholesterol is extracted from a chicken’s egg. What is the formula of this compound?
What is glacial acetic acid? What are its uses?
Why is acetic acid added?
What makes a molecule into organic molecule?
Explain substituted hydrocarbon?
How are pka and strength of a weak acid related?
What is the application of hardness date in environmental engineering practice?
How is hardness of water caused?