Different types of acid deposition are
sulphur dioxide
nitroges oxides
Answer:
Position D
Explanation:
One fourth of the Moon will be visible from Earth when the Moon is in position D. The reason why this is the right position is that the Moon will be in a position where the majority of its surface that is lighted by the Sun is facing the Sun. On the other hand, the angle is just right that about one quarter of the lighted part of the Moon is also facing the Earth. This will result in a perception from the Earth's view point that the Moon is lighted at one quarter of its surface.
Answer:
![\mathrm{Ca}^{2+} \text { and } \mathrm{Cl} \text { - ions are present in } 1: 2 \text { ratio in a solution of aqueous calcium chloride. }](https://tex.z-dn.net/?f=%5Cmathrm%7BCa%7D%5E%7B2%2B%7D%20%5Ctext%20%7B%20and%20%7D%20%5Cmathrm%7BCl%7D%20%5Ctext%20%7B%20-%20ions%20are%20present%20in%20%7D%201%3A%202%20%5Ctext%20%7B%20ratio%20in%20a%20solution%20of%20aqueous%20calcium%20chloride.%20%7D)
Explanation:
Here in Calcium Chloride ionic bond is present in between calcium and chlorine atoms. As we know according to Octet rule calcium have two excess atoms and for matching nearest noble gas electronic configuration. It donate two electrons to gain more stability and form
, while chlorine is deficient from one electron to meet nearest noble gas electronic configuration therefore two chlorine atoms accept excess electron from calcium individually and form two
ions.
![\text { Equation is as follows: } \mathrm{Ca}^{2+}+2 \mathrm{Cl}^{-} \rightarrow \mathrm{CaCl}_{2}](https://tex.z-dn.net/?f=%5Ctext%20%7B%20Equation%20is%20as%20follows%3A%20%7D%20%5Cmathrm%7BCa%7D%5E%7B2%2B%7D%2B2%20%5Cmathrm%7BCl%7D%5E%7B-%7D%20%5Crightarrow%20%5Cmathrm%7BCaCl%7D_%7B2%7D)
Hence aqueous solution of calcium chloride breaks the ionic bond pairing in one
and two
ions: ![\mathrm{CaCl}_{2} \longrightarrow \mathrm{H}_{2} \mathrm{O} \quad \mathrm{Ca}^{2+}(\mathrm{ag})+2 \mathrm{Cl}(\mathrm{ag})](https://tex.z-dn.net/?f=%5Cmathrm%7BCaCl%7D_%7B2%7D%20%5Clongrightarrow%20%5Cmathrm%7BH%7D_%7B2%7D%20%5Cmathrm%7BO%7D%20%5Cquad%20%5Cmathrm%7BCa%7D%5E%7B2%2B%7D%28%5Cmathrm%7Bag%7D%29%2B2%20%5Cmathrm%7BCl%7D%28%5Cmathrm%7Bag%7D%29)
Answer is 3
because on the periodic table, the small number above every element is the number of protons