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- Question
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
- Correct Answer
- heavy water
- 1. Group displacement law was given by
Options- A. Bacquerel
- B. Rutherford
- C. Mendeleaf
- D. Soddy and Fajan Discuss
- 2. Blue litmus paper is converted into red in solution of _______
Options- A. Acid
- B. Base
- C. Alkali
- D. Salt Discuss
- 3. Which of the following acts both as oxidising and reducing agent?
Options- A. nitric acid
- B. ammonia
- C. nitrous acid
- D. nitrogen peroxide Discuss
- 4. A bond formed by sharing of electrons between atoms of the element is called
Options- A. ionic bond
- B. covalent bond
- C. co ordinate bond
- D. none Discuss
- 5. Neutron was discovered by
Options- A. J.J.Thomson
- B. Chadwick
- C. Rrutherford
- D. Priestley Discuss
- 6. 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
- 7. Is Osmosis Active or Passive? Discuss
- 8. Tetraethyl lead is used as
Options- A. Fire extinguisher
- B. Gasoline additive
- C. Mosquito repellent
- D. Pain killer Discuss
- 9. 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
- 10. What are long chains of Carbon Molecules called
Options- A. Ribosomes
- B. Hydrocarbons
- C. Polymers
- D. None Discuss
Chemistry problems
Search Results
Correct Answer: Soddy and Fajan
Correct Answer: Acid
Correct Answer: nitrous acid
Explanation:
Nitrous acid act as an oxidising agent because it oxidises potassium iodide to iodine. It is also a reducing agent because it decolourises acidified potassium permanganate solution.
Nitric acid acts only as an oxidising agent
Ammonia acts only as a reducing agent
Nitrogen peroxide acts only as an oxidising agent.
Correct Answer: covalent bond
Correct Answer: Chadwick
Correct Answer: Decrease in the thickness of ozone layer in Stratosphere
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: 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: 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.
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