1. 12 minutes
2. 18 minutes
3. 24 minutes
4. 20 minutes
Ans : D
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
Under which of the following conditions will iron rust
Which of the following is NOT true about the Periodic Table
Round the following number to four significant figures and express the result in standard exponential notation 0.006543210?
Never found uncombined on Earth, what element occurs abundantly in limestone, gypsum and fluorite
What is the concentration, in parts per billion, of a solution that contains 1 microgram of solute per liter?
Which element has the following ground-state electron configuration 1s22s22p6?
To the nearest whole number, convert 0.300 atmosphere into millimeters of mercury, or torr
According to Bronsted-Lowry definition, a base is
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