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- Question
Which of the following acts both as oxidising and reducing agent?
Options- A. nitric acid
- B. ammonia
- C. nitrous acid
- D. nitrogen peroxide
- Correct Answer
- nitrous acid
ExplanationNitrous 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.
- 1. 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
- 2. Neutron was discovered by
Options- A. J.J.Thomson
- B. Chadwick
- C. Rrutherford
- D. Priestley Discuss
- 3. The Gas used for Artificial Ripening of Green Fruit is
Options- A. Acetone
- B. Di Carbonate
- C. Ethylene
- D. Ethyl Alcohol Discuss
- Calcium carbide is also used in some countries for artificially ripening fruit. When calcium carbide comes in contact with moisture, it produces acetylene gas, which is quite similar in its effects to the natural ripening agent, ethylene
- 4. How many Covalent Bonds can Nitrogen form
Options- A. 2
- B. 3
- C. 4
- D. 1 Discuss
- 5. Oxidation Number of 'S' in H2SO4 ?
Options- A. +6
- B. +2
- C. -6
- D. -2 Discuss
- 6. Blue litmus paper is converted into red in solution of _______
Options- A. Acid
- B. Base
- C. Alkali
- D. Salt Discuss
- 7. Group displacement law was given by
Options- A. Bacquerel
- B. Rutherford
- C. Mendeleaf
- D. Soddy and Fajan Discuss
- 8. 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
- 9. 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
- 10. Is Osmosis Active or Passive? Discuss
Chemistry problems
Search Results
Correct Answer: covalent bond
Correct Answer: Chadwick
Correct Answer: Ethylene
Explanation:
Ethylene is used for Artificial Ripening of Green Fruit.
Correct Answer: 3
Explanation:
Nitrogen ( ) forms Three Covalent Bonds to become stable.
Here the Atmomic Number of Nitrogen is 7. Because there are 2 electrons in the first orbital and 5 in the second and you still have space for 3 more. So it shares, 3 to get the stable octet. Therefore, there are 3 covalent bonds in .
Correct Answer: +6
Explanation:
In ,
Hydrogen has a charge of +2, with each hydrogen has +1.
Oxygen has a charge of -8, with each oxugen has -2.
Total charge = (2 - 8) = -6
Therefore, the Oxidation number of Sulphur S is '+6' because to make the compound stable.
Correct Answer: Acid
Correct Answer: Soddy and Fajan
Correct Answer: heavy water
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
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