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- Question
Tetraethyl lead is used as
Options- A. Fire extinguisher
- B. Gasoline additive
- C. Mosquito repellent
- D. Pain killer
- Correct Answer
- Gasoline additive
ExplanationTetraethyl 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.
- 1. Is Osmosis Active or Passive? Discuss
- 2. Ozone hole refers to
Options- A. Decrease in the thickness of ozone layer in Stratosphere
- B. Increase in thickness of ozone layer
- C. Decrease in the ozone layer in Troposphere
- D. Hole in the ozone layer Discuss
- 3. In nuclear reactor the speed of neutrons is slowed down by
Options- A. heavy water
- B. ordinary water
- C. Zinc rods
- D. molten caustic soda Discuss
- 4. Group displacement law was given by
Options- A. Bacquerel
- B. Rutherford
- C. Mendeleaf
- D. Soddy and Fajan Discuss
- 5. Blue litmus paper is converted into red in solution of _______
Options- A. Acid
- B. Base
- C. Alkali
- D. Salt Discuss
- 6. 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
- 7. What are long chains of Carbon Molecules called
Options- A. Ribosomes
- B. Hydrocarbons
- C. Polymers
- D. None Discuss
- 8. Which of the following metal is generally used for making filaments of bulb?
Options- A. W
- B. Ag
- C. Fe
- D. Rh Discuss
- 9. 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
- 10. 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 Discuss
Chemistry problems
Search Results
Correct Answer: Osmosis is the process in which water molecules move from a region of higher water potential to a region of lower potential down a water potential gradient across a partially permeable membrane It doen't requires any additional energy to do this work So, Osmosis is a Passive Active and passive transport processes are two ways molecules and other materials move in and out of cells and cross intracellular membranes 1 Active transport is the movement of molecules or ions against a concentration gradient (from an area of lower to higher concentration), which does not ordinarily occur, so enzymes and energy are required 2 Passive transport is the movement of molecules or ions from an area of higher to lower concentration Passive transport occurs because of the entropy of the system, so additional energy isn't required for it to occur 3 Active transport requires energy to proceed, while passive transport does not require the input of extra energy to occur
Correct Answer: Decrease in the thickness of ozone layer in Stratosphere
Correct Answer: heavy water
Correct Answer: Soddy and Fajan
Correct Answer: Acid
Correct Answer: Methyl acetylene
Explanation:
The IUPAC name of the compound is Methyl Acetylene or Propyne.
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: W
Explanation:
W is the symbol for chemical element Tungsten or Wolfram.
It is used in making filaments of bulbs.
Correct Answer: 4.58 Torr, 0.01°C
Correct Answer: Hydrogen
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