Chemistry problems
- 1. 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 Also asked in: AIEEE, Bank Exams, CAT, Analyst, Bank Clerk, Bank PO
Correct Answer: the existence of unpaired electrons in the valence shell
Explanation:
The reactivity of an atom arises from the existence of unpaired electrons in the valence shell.
- 2. The acid used in lead storage cells is
Options- A. Sulphuric acid
- B. Nitric acid
- C. Hydrochloric acid
- D. Phosphoric acid Also asked in: AIEEE, Bank Exams, CAT, GATE, Analyst, Bank Clerk, Bank PO
Correct Answer: Sulphuric acid
- 3. The number of electron levels in a magnesium atom is
Options- A. 3
- B. 2
- C. 1
- D. 0 Also asked in: AIEEE, Bank Exams, CAT, GATE, Analyst, Bank Clerk, Bank PO
Correct Answer: 3
- 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 Also asked in: AIEEE, Bank Exams, CAT, GATE, Analyst, Bank Clerk, Bank PO
Correct Answer: o-cresol < phenol < o-nitrophtenol
- 5. which of the following molecule contains a nonpolar covalent bond?
Options- A. Br2
- B. CO2
- C. CCl4
- D. CO Also asked in: AIEEE, Bank Exams, CAT, Analyst, Bank Clerk, Bank PO
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.
- 6. 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 Also asked in: AIEEE, Bank Exams, CAT, Analyst, Bank Clerk, Bank PO
Correct Answer: Potential energy
- 7. The luster of a metal is due to presence of free electrons.
Options- A. TRUE
- B. FALSE Also asked in: AIEEE, Bank Exams, CAT, Analyst, Bank Clerk, Bank PO
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.
- 8. 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 Also asked in: AIEEE, Bank Exams, GATE, Analyst, Bank Clerk, Bank PO
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.
- 9. Ammonia can be dried by
Options- A. Sulphuric acid
- B. Calcium oxide
- C. Phosphorus pentoxide
- D. Calcium Chloride Also asked in: AIEEE, Bank Exams, CAT, Analyst, Bank Clerk, Bank PO
Correct Answer: Calcium Chloride
Explanation:
Ammonia can be dried by Calcium Chloride or calcium hydroxide.
- 10. Kaolin is chemically classified as
Options- A. Argillaceous rock
- B. Silicious rock
- C. Metamorphic rock
- D. Calcareous rock Also asked in: AIEEE, Bank Exams, CAT, Analyst, Bank Clerk, Bank PO
Correct Answer: Argillaceous rock
Explanation:
Kaolin is chemically classified as Argillaceous rock.
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