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- Question
Shock resisting steels should have
Options- A. toughness
- B. low wear resistance
- C. low tensile strength
- D. low hardness
- Correct Answer
- toughness
ExplanationShock resisting steels should have toughness.
S-5 is a silico-manganese shock resisting steel that offers good ductility.
- 1. Kaolin is chemically classified as
Options- A. Argillaceous rock
- B. Silicious rock
- C. Metamorphic rock
- D. Calcareous rock Discuss
- 2. Ammonia can be dried by
Options- A. Sulphuric acid
- B. Calcium oxide
- C. Phosphorus pentoxide
- D. Calcium Chloride Discuss
- 3. 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
- 4. The luster of a metal is due to presence of free electrons.
Options- A. TRUE
- B. FALSE Discuss
- 5. 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
- 6. Non metal found in liquid state?
Options- A. Chlorine
- B. Bromine
- C. Fluorine
- D. Iodine Discuss
- 7. Permanent hardness of water may be removed by the addition of
Options- A. Alum
- B. Lime
- C. Sodium Carbonate
- D. Potassium Permanganate Discuss
- 8. Diamond is harder than Graphite because of
Options- A. tetrahedral structure of diamond
- B. difference of crystalline structures
- C. difference of layers of atoms
- D. hexagonal structure of graphite Discuss
- 9. A sample of matter must be copper if
Options- A. atoms in the sample react with oxygen
- B. the sample can conduct electricity
- C. each atom in the sample has 29 protons
- D. the sample melts at 1768k Discuss
- 10. PCP is more commonly known as
Options- A. Acid
- B. Angel dust
- C. Ecstasy
- D. None of the above Discuss
Chemistry problems
Search Results
Correct Answer: Argillaceous rock
Explanation:
Kaolin is chemically classified as Argillaceous rock.
Correct Answer: Calcium Chloride
Explanation:
Ammonia can be dried by Calcium Chloride or calcium hydroxide.
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: 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: 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.
Correct Answer: difference of crystalline structures
Correct Answer: each atom in the sample has 29 protons
Explanation:
A sample of matter must be copper if each atom in the sample has 29 protons.
Correct Answer: Angel dust
Explanation:
Phencyclidine (PCP) is a drug used for its mind-altering effects. It is also known as Angel dust. As a recreational drug, it is typically smoked, but may be taken by mouth, snorted, or injected. It may also be mixed with cannabis or tobacco.
Causes and Effects ::
* PCP may cause hallucinations, distorted perceptions of sounds, and violent behavior.
* Its effects include seizures, coma, addiction, and an increased risk of suicide.
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