An acid is said to be weak if?
its ions are so completely dissociated that they easily drift apart
the acid is not corrosive
the acid has low specific gravity
its ions move very slowly when in solution
its ions are incompletely dissociated
Correct answer is E
No explanation has been provided for this answer.
In the reaction of oxygen with hydrogen to produce water, which of the following statements is true?
One atom of hydrogen reacts with two atoms of oxygen to give one molecule of water
Two atoms of hydrogen react with two atoms of oxygen to give two molecules of water
One molecule of oxygen reacts with one molecule of hydrogen to give two molecules of water
One molecule of hydrogen reaccts with two molecules of oxygen to give three molecules of water
One molecule of oxygen reacts with two molecules of hydrogen to give two molecules of water
Correct answer is E
The oxidation of hydrogen by oxygen gives water and a certain amount of heat of formation.
Which of the following is the electronic configuration of sodium?
(Atomic number of Na = 11)
1s2 2s22p6 3s2
1s2 2s22p6 3s2 3p1s2 2s22p6 3s1
1s2 2s22p6 3s1
1s2 2s22p6 3s°
1s2 2s22p6 4s1
Correct answer is C
No explanation has been provided for this answer.
A polymerization reaction is one in which?
small molecules form giant molecules
atoms form molecules
giant molecules form small molecules
molecules form volatile compounds
a molecule rearranges itself
Correct answer is A
No explanation has been provided for this answer.
Allotropes are elements having?
different physical but the same chemical properties
different chemical but the same physical properties
the same chemical and physical properties
different atomic structure
the same position in the periodic table
Correct answer is A
Allotropes: These are the different forms of elements having different physical properties but the same chemical properties.
For example, the allotropes of carbon. Crystalline form: Diamond, Graphite and Fullerene