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- Question
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
- Correct Answer
- All of the above
ExplanationGroup 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.
- 1. The luster of a metal is due to presence of free electrons.
Options- A. TRUE
- B. FALSE Discuss
- 2. 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
- 3. which of the following molecule contains a nonpolar covalent bond?
Options- A. Br2
- B. CO2
- C. CCl4
- D. CO Discuss
- 4. 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
- 5. The number of electron levels in a magnesium atom is
Options- A. 3
- B. 2
- C. 1
- D. 0 Discuss
- 6. Ammonia can be dried by
Options- A. Sulphuric acid
- B. Calcium oxide
- C. Phosphorus pentoxide
- D. Calcium Chloride Discuss
- 7. Kaolin is chemically classified as
Options- A. Argillaceous rock
- B. Silicious rock
- C. Metamorphic rock
- D. Calcareous rock Discuss
- 8. Shock resisting steels should have
Options- A. toughness
- B. low wear resistance
- C. low tensile strength
- D. low hardness Discuss
- 9. Non metal found in liquid state?
Options- A. Chlorine
- B. Bromine
- C. Fluorine
- D. Iodine Discuss
- 10. Permanent hardness of water may be removed by the addition of
Options- A. Alum
- B. Lime
- C. Sodium Carbonate
- D. Potassium Permanganate Discuss
Chemistry problems
Search Results
Correct Answer: TRUE
Explanation:
True, 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.
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: 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.
Correct Answer: Sodium Carbonate
Explanation:
Permanent hardness of water may be removed by the addition of Sodium Carbonate.
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