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- Question
The substances that are composed of to or more different elements in fixed proportion by mass are called
Options- A. mixture
- B. compound
- C. element
- D. None of these
- Correct Answer
- compound
- 1. A Radioactive subatance emits
Options- A. alpha particles
- B. beta particle
- C. gamma particle
- D. all of the three Discuss
- 2. What temperature is considered freezing? Discuss
- 3. Why does carbon tetrachloride have no dipole moment?
Options- A. Because of same size of carbon and chlorine atoms
- B. Because of regular tetrahedral structure
- C. Because of planar structure
- D. Because of similar electron affinities of carbon and chlorine Discuss
- 4. Which of the following elements has the lowest melting point?
Options- A. Zinc
- B. Titanium
- C. Sulphur
- D. Fluorine Discuss
- 5. What is formed when Carbon Dioxide is passed through Lime Water?
Options- A. Copper Sulphate
- B. Calcium Carbonate
- C. Magnesium Oxide
- D. Baking Soda Discuss
- 6. Air is
Options- A. compound
- B. element
- C. mixture
- D. solution Discuss
- 7. Whcih one is the compound in the following
Options- A. mercury
- B. ozone
- C. air
- D. ammonia Discuss
- 8. Which of the following is the mixture
Options- A. distilled water
- B. gasoline
- C. liquified petroleum gas
- D. both (b) & (c) Discuss
- 9. Washing soda is
Options- A. sodium hydroxide
- B. sodium carbonate
- C. sodium bicorbonate
- D. Potassium chloride Discuss
- 10. In the making of jewels, gold is usually mixed with
Options- A. zinc
- B. tin
- C. copper
- D. aluminium Discuss
Chemistry problems
Search Results
Correct Answer: all of the three
Correct Answer: We have all been taught that water freezes at 32 degrees Fahrenheit, 0 degrees Celsius, 27315 Kelvin That's not always the case, though Scientists have found liquid water as cold as -40 degrees F in clouds and even cooled water down to -42 degrees F in the lab
Correct Answer: Because of regular tetrahedral structure
Correct Answer: Fluorine
Correct Answer: Calcium Carbonate
Correct Answer: mixture
Correct Answer: air
Correct Answer: both (b) & (c)
Correct Answer: sodium carbonate
Explanation:
Sodium hydroxide - NaOH is caustic soda
Sodium carbonate - Na2CO3 is washing soda
Sodium bicarbonate - NaHCO3 is baking soda
Correct Answer: copper
Explanation:
In making jewels, gold is usually mixed with copper to make it little hard.
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