Blue litmus paper is converted into red in solution of _______

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: Ethylene

Explanation:

Ethylene is used for Artificial Ripening of Green Fruit.

• 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

 

Correct Answer: 3

Explanation:

Nitrogen ( N 2) 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  N 2.

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

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.