Answer: difference in Vander Waals forces
Explanation:
The intermolecular force of attraction between the molecules in chlorine is WEAKER than that of Bromine.
This force is known as VANDER WAALS forces. And it DECREASES down the group; so Chlorine which is placed higher is a GAS, while Bromine placed lower in Group 7 is a LIQUID.
At STP, the <span>physical property of aluminum that always remains the same from sample to sample is density. The standard temperature is actually 273 degree kelvin and the standard pressure is 1 atmospheric pressure. I hope that this is the answer that has actually come to your desired help.</span>
Answer:
Here are key points on lattice energy
Lattice energy (L.E) is the energy required to separate a mole of an ionic solid into gaseous ions.
• L. E cannot be measured empirically, but it can be estimated using the Born-Haber cycle or calculated using electrostatics.
• The charge and radius of the bonded ions are two main factors that contribute to the magnitude of the L.E.
Explanation:
About the trend Yes/No are included to the details.
a)
1. True - (as charge increases, lattice energy increases)
2. False - (Oxide and chloride both have -1 charge)
3. False (The chloride ion is bigger having a bigger radius)
4. False - (the charges quoted are incorrect )
5. True
(b)
1. True - (it has the smallest radius)
2. True
3. False (the ion in all are +1 and -1)
4. False
5. False
6. False
(c)
1. False - ( BaO +2 and -2 while KF +1 and -1)
1. False - ( BaO +2 and -2 while KF +1 and -1)
2. True
3. False
4. True
5. True
Answer:
a. True
Explanation:
Methyl red is an indicator widely used in quality control of oxides as Zinc oxide in the titration with sulfuric acid.
As is used in titrations of acid-base reactions the indicator change in colour. Is red when the pH < 4.4 (Acidic Solutions) and is yellow when pH > 6.2 (Neutral-Basic solutions).
A change in colour means the structure of the indicator is changing with pH. Thus, the answer is:
<h3>a. True
</h3>
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