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- Question
Which of the following is NOT a primary green house gas in the earth's atmosphere?
Options- A. Methane
- B. Ozone
- C. Nitrous oxide
- D. Hydrogen
- Correct Answer
- Hydrogen
- 1. Triple point of water corresponds to
Options- A. 1 atm, 0°C
- B. 1 atm, 0.01°C
- C. 1 atm, 0 K
- D. 4.58 Torr, 0.01°C Discuss
- 2. Which of the following metal is generally used for making filaments of bulb?
Options- A. W
- B. Ag
- C. Fe
- D. Rh Discuss
- 3. What are long chains of Carbon Molecules called
Options- A. Ribosomes
- B. Hydrocarbons
- C. Polymers
- D. None Discuss
- 4. What is the IUPAC name for the following compound? H3C-C?C-H
Options- A. Acetylene
- B. Methyl acetylene
- C. Butanol
- D. Decanoic Acid Discuss
- 5. Tetraethyl lead is used as
Options- A. Fire extinguisher
- B. Gasoline additive
- C. Mosquito repellent
- D. Pain killer Discuss
- 6. An alloy is
Options- A. a compound
- B. an allotropic form
- C. an isomer
- D. a mixture Discuss
- 7. A particle which is four times in mass and two times in charge that of proton is
Options- A. helium atom
- B. an alpha particle
- C. deuteron
- D. tritium Discuss
- 8. Atomic weight of an element is given by
Options- A. sum of neutrons and electrons
- B. sum of neutrons and protons
- C. only neutrons
- D. only protons Discuss
- 9. Number of moles of CO2 present in 24 grams of carbon is
Options- A. 0.5
- B. 1
- C. 2
- D. 0.25 Discuss
- 10. Chloroform used as anaesthetic should be preserved in the dark in tightly stoppered bottles because otherwise
Options- A. it becomes coloured
- B. it gets evaporated in air
- C. it gets oxidised to phosgene
- D. it gets decomposed to chloropicrin Discuss
Chemistry problems
Search Results
Correct Answer: 4.58 Torr, 0.01°C
Correct Answer: W
Explanation:
W is the symbol for chemical element Tungsten or Wolfram.
It is used in making filaments of bulbs.
Correct Answer: Polymers
Explanation:
A small organic molecule (sugars or amino acids), several of which may be bonded together to form a chain called a polymer.
Correct Answer: Methyl acetylene
Explanation:
The IUPAC name of the compound is Methyl Acetylene or Propyne.
Correct Answer: Gasoline additive
Explanation:
Tetraethyl lead is a highly toxic compound used as a gasoline additive.
Tetraethyl lead abbreviated as TEL, is an organo lead compound with the formula (CH3CH2)4Pb. It is a petro-fuel additive which in turn caused increased vehicle performance. This is also used as an antiknock agent in gasoline and jet fuels. Tetraethyl lead is absorbed rapidly by the skin, the lungs, and the gastrointestinal tract. It is converted to triethyl lead, which might be responsible for its toxicity.
Correct Answer: a mixture
Correct Answer: an alpha particle
Correct Answer: sum of neutrons and electrons
Explanation:
Atomic weight=number of neutrons+number of protons
Correct Answer: 2
Explanation:
1 mole of CO2 contain 12gms of carbon and 44 gms of CO2
therefore 24 gms of carbon is present in 88 gms of CO2 or 2 moles of CO2
Correct Answer: it gets oxidised to phosgene
Explanation:
Chloroform, is easily oxidised to the highly poisonous gas known as phosgene or carbonyl chloride COCl2. Hence if it is used as anaesthetic it should be kept free from sunlight and air.
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