Discussion
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- Question
Which scientist established the Law of Octaves?
Options- A. John Newlands
- B. Antoine Lavoisier
- C. Alfred Nobel
- D. Marie Curie
- Correct Answer
- John Newlands
- 1. Which gas is not produced by volcanic eruptions?
Options- A. Methane
- B. carbon dioxide
- C. sulfur dioxide
- D. hydrochloric acid Discuss
- 2. Which combination will produce a precipitate?
Options- A. NaOH (aq) and HCl (aq)
- B. KOH (aq) and Mg(NO3)2 (aq)
- C. NaC2H3O2(aq) and HCl (aq)
- D. AgNO3(aq) and Ca(C2H2O3) (aq) Discuss
- 3. Elements that are poor conductors of heat and electricity are
Options- A. Metals
- B. Non metals
- C. Halogens
- D. Noble Discuss
- 4. Which characteristic is a property of molecular substances?
Options- A. good heat conductivity
- B. high melting point
- C. good heat conductivity
- D. low melting point Discuss
- 5. Which gas is used for the preparation of Soda water?
Options- A. Carbon Dioxide
- B. Oxygen
- C. Hydrogen
- D. Ammonia Discuss
- 6. Another name for the activated complex is
Options- A. Transmission state
- B. Energy barrier
- C. Collision group
- D. Transition state Discuss
- 7. Energy transfer by convection is primarily restricted to
Options- A. fluids
- B. solids
- C. liquids
- D. gases Discuss
- 8. Rayon is chemically
Options- A. Glucose
- B. Amylase
- C. Cellulose
- D. Pectin Discuss
- 9. Which chemical is present in the cells of cork of tree which makes them impervious to gases and water
Options- A. Cellulose
- B. Suberin
- C. Pectin
- D. Lignin Discuss
- 10. Which of the following inert gases is placed in period 4 of the periodic table?
Options- A. Kr
- B. Rn
- C. Xe
- D. Ar Discuss
Chemistry problems
Search Results
Correct Answer: Methane
Correct Answer: KOH (aq) and Mg(NO3)2 (aq)
Correct Answer: Non metals
Explanation:
Elements that are poor conductors of heat and electricity are called Non metals.
Correct Answer: low melting point
Explanation:
The substances in which two or more atoms are attached together are called as molecular substances.
Properties of molecular substances ::
1. Molecular substances are bonded with covalent bonds
2. Bad heat conductivity
3. Bad electrical conductivity
4. Have low melting points.
Correct Answer: Carbon Dioxide
Correct Answer: Transition state
Correct Answer: fluids
Explanation:
Convection is the mode of heat transfer which involves bulk motion of a fluid to transfer heat. Energy transfer by convection is primarily restricted to fluids. Fluids can be both liquids and gases.
Correct Answer: Cellulose
Correct Answer: Suberin
Correct Answer: Kr
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