Advertisements
Advertisements
Question
Choose the most appropriate answer from the following list of oxides which fit the description.
An oxide which dissolves in water forming an acid.
Options
SO2
SiO2
Al2O3
MgO
CO
Na2O
Solution
SO2
Explanation:
\[\ce{SO2 + H2O -> H2SO3}\]
APPEARS IN
RELATED QUESTIONS
Taking the example of an element of atomic number 16, explain how the electronic configuration of the atom of an element relates to its position in the modern periodic table and how valency of an element is calculated on the basis of its atomic number.
Name the element which is in first group and third period.
Nitrogen (atomic number 7) and phosphorus (atomic number 15) belong to group 15 of the periodic table. Write the electronic configuration of these two elements. Which of these will be more electronegative? Why?
The atomic number of an element is 20. In modern periodic table, this element is placed:
(a) 2nd period
(b) 4th period
(c) 3rd period
(d) 1st period
Why fluorine has higher E.N. than chorine?
An element 'M' has atomic number 12.
(a) Write its electronic configuration.
(b) State the group to which 'M' belongs.
(c) Is 'M' a metal or a non-metal.
(d) Write the formula of its chloride.
On the basis of electronic configuration, how will you identify the first and the last element of a period?
The position of elements A, B, C, D and E in the periodic table are shown below:
|
Group 1 |
Group 2 |
Group 17 |
Group 18 |
|
|
|
|
D |
|
|
B |
C |
|
|
A |
|
|
E |
State which is most reactive (i) metal (ii) non-metal
Element P has atomic number 19. To which group and period, does P belong? Is it a metal or a non-metal? Why?
Which of the following would weigh the least?
(Atomic masses C = 12, 0 = 16, Na = 23)
