⟩ By walking at 3/4th of his usual speed, a man reaches office 20 minutes later than usual. What is his usual time?
1. 30 min
2. 60 min
3. 70 min
4. 50 min
Ans : B
1. 30 min
2. 60 min
3. 70 min
4. 50 min
Ans : B
Which of the following are NOT carbonate minerals
Fish in an aquarium require oxygen to live, which is usually done by pumping air into the fish tank using a mechanical pump. If all other things remain constant, the most effective transfer of oxygen to water comes from
The wavelength of yellow light is 600 nanometers. What is the wavelength in centimeters
What is the pH of a solution with a hydronium ion concentration of 1 X 10-8 moles/dm3?
Convert -40oF into Centigrade
What is the only known substance for which there is no triple point
What is the branch of chemistry that deals with the relationship between electricity and chemical reactions?
Convert 673 Kelvin into degrees centigrade
Until the early 1960s, what group of elements were called the inert gases
The reaction of hydrocarbons with oxygen to produce carbon dioxide, water and heat is called