Answer:
The correct option is C.
Solutions with low pH values have sour taste.
Explanation:
Low pH value show acidic property which can be define as , -log of conc. of hydrogen ion.
Acid has following properties
- Sour taste
- Turn blue litmus into red
- corrosive
-OH group: Base have OH groups. So it is not correct option so it not correct for low pH i.e. acid
turns litmus paper blue: Base turn red litmus into blue, so it not correct for low pH i.e. acid
feels slippery: Bases are mostly slippery like soap
tastes sour: Sour taste is for acid and bitter taste is for base. So it is correct option for acid
Air is a mixture of several gasses
Calcium is in group 2 period 4 of periodic table
Oxygen is in group 16 and period 2
neon is in period 2 and group 16.
Explanation:
Valence electron in calcium =2
valence electron in oxygen= 6
valence electron in neon= 8 valence electron.
Calcium is placed in s block group 2 of period 4.
oxygen is placed in period 2 and group 16
Neon is a p block element, placed in period 2 and group 16.
Calcium is a elecropositive element which can share or donates its electrons to for compound, it has oxidation state of +2 and hence placed in group 2
Oxygen is electronegative as it can accept or share 2 electrons to form a bond. It has oxidation of -2.
Example is CaO.
Neon has its outer shell complete it is an inert element which will not share or donate electrons. it has oxidation state of 0
Answer:
B. 1 +8 > 2 + 4
Explanation:
Hello!
In this case, since inequalities show how a number is different, greater or less than, to an other, considering the given options, just B. 1 +8 > 2 + 4 is an inequality because if we solve the operation we obtain:
9 > 6
Which means that nine is greater than 6.
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