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- Question
The reactivity of an atom arises from
Options- A. the existence of unpaired electrons in the valence shell
- B. the potential energy of the valence shell
- C. the average distance of the outermost electron shell from the nucleus
- D. the sum of the potential energies of all the electron shells
- Correct Answer
- the existence of unpaired electrons in the valence shell
ExplanationThe reactivity of an atom arises from the existence of unpaired electrons in the valence shell.
- 1. Technically, tempera is paint in which the vehicle is in
Options- A. an emulsion
- B. a pigment
- C. an impasto
- D. a ground Discuss
- 2. The bonds in the compound MgSO4 can be described as
Options- A. covalent
- B. ionic
- C. both A & B
- D. None of the above Discuss
- 3. A colored ion generally indicates a
Options- A. transition metal
- B. metalloid
- C. large in size
- D. Both B & C Discuss
- 4. An example of an extensive property of matter is
Options- A. Volume
- B. Mass
- C. Density
- D. All the above Discuss
- 5. Monopotassium tartarate was used in
Options- A. Fertiliser
- B. Explosives
- C. Photography
- D. Baking Discuss
- 6. The acid used in lead storage cells is
Options- A. Sulphuric acid
- B. Nitric acid
- C. Hydrochloric acid
- D. Phosphoric acid Discuss
- 7. The number of electron levels in a magnesium atom is
Options- A. 3
- B. 2
- C. 1
- D. 0 Discuss
- 8. Arrange the following compounds in order of increasing acidity?
Options- A. o-cresol < phenol < o-nitrophtenol
- B. phenol < o-nitrophtenol < o-cresol
- C. o-nitrophtenol < o-cresol < phenol
- D. None of the above Discuss
- 9. which of the following molecule contains a nonpolar covalent bond?
Options- A. Br2
- B. CO2
- C. CCl4
- D. CO Discuss
- 10. Which kind of energy is stored in a chemical bond?
Options- A. Potential energy
- B. Kinetic energy
- C. Both A & B
- D. None of the above Discuss
Chemistry problems
Search Results
Correct Answer: an emulsion
Correct Answer: both A & B
Explanation:
Here the given compound is MgSO4.
In the given compound, Sulphur (S) and Oxygen (O) are two non metals and Magnesium (Mg) is a metal.
In this compound, Sulphur and Oxygen reacts to form covalent bond and the metal Magnesium reacts with both non metals Sulphur and Oxygen to form ionic bonds.
Hence, in the given compound MgSO4 there are both covalent and ionic bonds.
Correct Answer: transition metal
Explanation:
A colored ion generally indicates a transition metal.
Correct Answer: All the above
Explanation:
Any properties that are dependent on the amount of matter are called as extensive properties of matter.
Examples are :: Mass, Volume, Density (M/V),...
Correct Answer: Baking
Explanation:
Monopotassium tartarate was used in baking powder.
Correct Answer: Sulphuric acid
Correct Answer: 3
Correct Answer: o-cresol < phenol < o-nitrophtenol
Correct Answer: Br2
Explanation:
Br-Br.
In Br2, two of the same atoms, pull on each side of the bond is equal making it as non-polar.
The other options all include a significantly more electronegative atom (the oxygens and the chlorine), so those bonds are all polar covalent.
Correct Answer: Potential energy
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