Question

pls ans urgently.......​

Answer 1

(1). a

(2).a

(3).a

(4).b

(5).b

(6).b

(7).c

(8).c

(9).c

(10).b

(11).c

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Answer 2

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$\bf\purple{\implies\:1. \:\: a\:option\:}$

Oxidation is the loss of electrons. Reduction is the gain of electrons. In terms of oxygen transfer, oxidation may be defined as the chemical process in which a substance gains oxygen or loses electrons and hydrogen. When one of the reactants is oxygen, then oxidation is the gain of oxygen.

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$\bf\purple{\implies\:2. \:\: b\:option\:}$

Displacement.

Fe placed in copper sulphate, displaces copper from copper sulphate solution and releases free copper particles. This results in the change of blue coloured copper sulphate solution to green coloured ferrous sulphate solution.

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$\bf\purple{\implies\:3. \:\: a\:option\:}$

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$\bf\purple{\implies\:4. \:\: c\:option\:}$

The formula NH4OH is ammonium hydroxide. It is a solution that is made up of ammonia and water. The pH of NH4OH is 11.6, so it is a base.

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$\bf\purple{\implies\:5. \:\: b\:option\:}$

Formic acid

Formic acid, a component of ant venom uncommon in bee or wasp stings, is derived from the superfamily name Formicidae.

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$\bf\purple{\implies\:6. \:\: c\:option\:}$

An acid is a substance that increases the number of H+ ions in a solution. ... A solution of pH = 7 is neutral, a solution of pH lower than 7 is acidic, and a solution of pH greater than 7 is basic (alkaline). The number of H+ ions increases as the pH number decreases

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$\bf\purple{\implies\:7. \:\: d\:option\:}$

Excretion is the process important for osmoregulation. Nitrogenous wastes or salts that are metabolic wastes of organisms require the process of osmoregulation for the removal of these substances from the unfiltered blood. E.g: The amount of water reabsorbed from the glomerular filtrate also requires osmoregulation.

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