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- Question
The luster of a metal is due to presence of free electrons.
Options- A. TRUE
- B. FALSE
- Correct Answer
- TRUE
ExplanationTrue, The luster of a metal is due to presence of free electrons. Luster means shine or soft glow. We know that metals have the quality of reflecting light from its surface.
- 1. 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
- 2. which of the following molecule contains a nonpolar covalent bond?
Options- A. Br2
- B. CO2
- C. CCl4
- D. CO Discuss
- 3. 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
- 4. The number of electron levels in a magnesium atom is
Options- A. 3
- B. 2
- C. 1
- D. 0 Discuss
- 5. The acid used in lead storage cells is
Options- A. Sulphuric acid
- B. Nitric acid
- C. Hydrochloric acid
- D. Phosphoric acid Discuss
- 6. Which properties are characteristic of the group 1 metals?
Options- A. Low melting points
- B. Produce hydrogen when react with water
- C. Soft in nature
- D. All of the above Discuss
- 7. Ammonia can be dried by
Options- A. Sulphuric acid
- B. Calcium oxide
- C. Phosphorus pentoxide
- D. Calcium Chloride Discuss
- 8. Kaolin is chemically classified as
Options- A. Argillaceous rock
- B. Silicious rock
- C. Metamorphic rock
- D. Calcareous rock Discuss
- 9. Shock resisting steels should have
Options- A. toughness
- B. low wear resistance
- C. low tensile strength
- D. low hardness Discuss
- 10. Non metal found in liquid state?
Options- A. Chlorine
- B. Bromine
- C. Fluorine
- D. Iodine Discuss
Chemistry problems
Search Results
Correct Answer: Potential energy
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: o-cresol < phenol < o-nitrophtenol
Correct Answer: 3
Correct Answer: Sulphuric acid
Correct Answer: All of the above
Explanation:
Group 1 metals are also called as alkali metals with reactive in nature and low melting points. They are soft and produce hydrogen and alkaline metal hydroxide solution when they react with water.
Correct Answer: Calcium Chloride
Explanation:
Ammonia can be dried by Calcium Chloride or calcium hydroxide.
Correct Answer: Argillaceous rock
Explanation:
Kaolin is chemically classified as Argillaceous rock.
Correct Answer: toughness
Explanation:
Shock resisting steels should have toughness.
S-5 is a silico-manganese shock resisting steel that offers good ductility.
Correct Answer: Bromine
Explanation:
Bromine is the Non metal found in liquid state.
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