Question

please give answer science class 10 ​

Answer 1

Answer:

1) Strong acid is an acid that ionizes completely in aqueous solution. ... Weak acid is an acid that ionizes partially in a solution. It gives off only a few of its (H+) atoms when dissolved in water.

2) It is an oxidation reaction as ethanol is converted to ethanoic acid since the hydrogen atom is removed and oxygen is added.

3)

Explanation:

To prove the necessity of carbon dioxide in photosynthesis following steps need to do

Insert a part of the leaf of a destarched plant into a conical flask containing potassium hydroxide.

Potassium hydroxide solution absorbs the carbon dioxide gas from the air present in the glass bottle.

Leave the plant sunlight.

After few hours, perform a starch test to this and another leaf of the same plant.

Observation-

Leaf exposed to the atmosphere are bluish black.

Leaf exposed to KOH does not change to blue-black colour

Result- Starch is present in the green part of the leaf.

Conclusion- Presence of starch proves that chlorophyll is necessary for photosynthesis as it traps sunlight.

4)The atmospheric refraction is defined as the phenomenon of refraction of light due to change in the refractive index at different level in atmosphere. Light gets refracted at different layers of atmosphere. The air just above the radiator becomes hotter than the air farther up.

5(I) Maxwell's right-hand thumb rule: Magnetic field produced around a straight conductor carrying current. ... If the thumb of the right-hand points along the direction of the current, then the remaining curled fingers of the same hand give the magnetic field direction due to the current

(ii) A current carrying conductor placed in a magnetic field experiences a force. If the direction of the field and that of current are mutually perpendicular to each other, then the force acting on the conductor will be perpendicular to both and that can be determined using the Fleming's left-hand rule

(iii) When the conductor is held perpendicular to the magnetic field, it experiences maximum force.

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