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- Question
A yellow element that stinks when burned
Options- A. Sulphur
- B. Chlorine
- C. Fluorine
- D. Bromine
- Correct Answer
- Sulphur
ExplanationSulphur is an yellow element that stinks when burned.
- 1. Glycolysis is the conversion of
Options- A. Glucose to pyruvate
- B. Glucose to proteins
- C. Pyruvate to glucose
- D. All of the above Discuss
- 2. A simple rule concerning water and electrolyte regulation is
Options- A. water passively follows salt
- B. salt actively follows water
- C. water actively follows salt
- D. salt passively follows water Discuss
- 3. What occurs when an atom loses an electron?
Options- A. The atom's radius decreases and the atom becomes a positive ion.
- B. The atom's radius increases and the atom becomes a negative ion.
- C. The atom's radius decreases and the atom becomes a negative ion.
- D. The atom's radius increases and the atom becomes a positive ion. Discuss
- 4. Browning of paper in old books is caused by
Options- A. oxidation of cellulose
- B. collection of dust
- C. frequent use
- D. lack of aeration Discuss
- 5. Reduction of oxygen which forms water occurs during
Options- A. Respiration
- B. Photosynthesis
- C. Both A & B
- D. Neither photosynthesis nor respiration Discuss
- 6. Which equation represents a neutralization reaction?
Options- A. 2Al(OH)3(s) ---> Al2O3(s) + 3H2O(l)
- B. H2SO4(aq) + 2NaOH(aq) ---> Na2SO4(aq) + 2H2O(l)
- C. 2H2(g) + O2(g) ---> 2H2O(l)
- D. H2CO3(aq) ---> CO2(g) + H2O(l) Discuss
- 7. Which group 4A element has the highest ionization energy?
Options- A. Silicon
- B. Tin
- C. Lead
- D. Carbon Discuss
- 8. Hydrogen bonds and hydrophilic interactions are
Options- A. Strong chemical bonds that hold together the atoms within a molecule
- B. Weak chemical bonds that hold together the atoms within a molecule
- C. Strong chemical bonds that link together separate molecules
- D. Weak chemical bonds that link together separate molecules Discuss
- 9. Which molecule contains a nonpolar covalent bond?
Options- A. Cl2
- B. Br2
- C. H2
- D. All of the above Discuss
- 10. Hydrophilic molecules readily associate with
Options- A. water
- B. alcohols
- C. both A & B
- D. none of the above Discuss
Chemistry problems
Search Results
Correct Answer: Glucose to pyruvate
Explanation:
Glycolysis is the metabolic process of converting 1 molecule of glucose to 2 molecules of pyruvate through a series of 10 enzyme catalyzed reactions.
Correct Answer: water passively follows salt
Explanation:
A simple rule concerning water and electrolyte regulation is water passively follows salt.
Correct Answer: The atom's radius decreases and the atom becomes a positive ion.
Explanation:
When an atom loses an electron it becomes a positive ion by acquiring negatively charged. When it loses electron, the atom's radius also decreased.
Correct Answer: oxidation of cellulose
Correct Answer: Respiration
Correct Answer: H2SO4(aq) + 2NaOH(aq) ---> Na2SO4(aq) + 2H2O(l)
Explanation:
Here in the option B) H2SO4 - Sulfuric acid is reacting with sodium hydroxide (NaOH), a base to produce a salt (Sodium Sulfate), and water (H2O). This is characteristic of of acid-base neutralization reactions.
Correct Answer: Carbon
Explanation:
As the ionization energies of the elements decreases down the group carbon has got the highest ionization energy in the group being at the top of the group.
Carbon is on the top of the group 4 among the given elements. Hence, Carbon has the highest ionization energy.
Correct Answer: Weak chemical bonds that link together separate molecules
Correct Answer: All of the above
Explanation:
In all the given options, molecules are containing nonpolar covalent bonds.
Correct Answer: both A & B
Explanation:
Hydrophilic molecules readily associate with water molecules and water like molecules such as alcohols.
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