John is a scientist in a large pharmaceutical company. He devices many useful products using his knowledge of chemistry. Today, he has four solutions in front of him, solution A, solution B, solution C, and solution D. Solution A is a buffer, but solution B is not a buffer. Solution C is acidic, but solution D is not acidic. He needs to figure out what each solution does. Which solution would not decrease the pH of pure water, solution C or solution solution D?
Ans: solution D

John spends most of his time on computers. While at work his work computer does not need modern capabilities. So, he still uses Windows 2000 at his office computer. At home it's a complete different ball game. He plays so much computer games at home that he needs a better computer. In his home computer he installed the latest version of Windows. Now, there is no lag in his system. In which computer CPU will turn off many internal components, office computer or home computer?
Ans: office computer

There were Two villages Berg village situated at 3000 ft, at the base of the mountain, and Steep village, situated at 8500 feet. People visiting the area always stop in Berg village and feel great, but they feel bad and winded once they get to Steep village. Which village has a lower atmospheric pressure?
Ans: Steep

Due to an increase in the number of factories releasing carbon dioxide the concentration of it has increased. Recent reports show a correlation between increasing levels of carbon dioxide and the average global temperature increasing. Given the average temperature increases even more, will the concentration of carbon dioxide have increased or decreased?
Ans: increased