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Topic:
Chemical Bonding
Question:
Bond energy can also be regarded as:
Options:
- Bond enthalpy
- Bond diffusing energy
- Bond breaking energy
- All of thes
Correct Answer:
All of these
Explanation:
Bond energy is the amount of energy required to break bonds in one mole of a substance. All of the options given below have same meaning thus all options can be regarded as bond energy.
Topic:
Electrochemistry
Question:
The oxidation of oxygen in peroxides is?
Options:
- +1
- -1
- +2
- -2
Correct Option:
-1
Explanation:
Peroxides include hydrogen peroxide, H2O2. This is an electrically neutral compound and so the sum of the oxidation states of the hydrogen and oxygen must be zero.
Topic:
Transition Elements
Question:
Transition elements from complexes due which of the following reason?
Options:
- Para magnetism
- Vacant d-orbitals
- Large nuclear charge
- Small cation size
Correct Option:
Vacant d-orbitals
Explanation:
Vacant orbitals of central metal atom or iron are filled by ligands to form metal complexes.
In Chemistry, a coordination complex or metal complex consists of a central atom or ion which is usually metallic and is called the coordination center and a surrounding array of bound molecules or ions that are in turn known as ligands or complexing agents. Many metal containing compounds, especially those of transition metals are coordination complexes.