Question

all answers please
brainliest​

Answer 1

HLW...HERE IS YOUR CORRECT ANSWERS :

1)ans:

A white substance, which is insoluble in water is formed. THIS insoluble substance is KNOWN as precipitation. Any REACTION that produces a precipitate can be called as precipitation REACTION.

Eg: NaSO4 + BaCl2 gives BaSO4 + 2NaCl.

2)ans:

REACTION in which both oxidation and reduction takes place are called redox REACTION.

Eg: ZnO + C gives Zn+CO

3) ans:

(a) When a metal is attracted by substance around it such as acids, moisture etc. It is said to corrode and this process is called corrosion.

Rust is formed when iron reacts with oxygen in moist air. The following chemical equation represents the reaction: 4Fe + 3O2 → 2Fe2O3.

(b) Rusting.

(C) TO PREVENT FROM CORROSION.

4) ANS:

When fats and oils are exposed to air they become rancid and their smell and taste changes.

To prevent this anti oxidents are used.

5)ans:

⭐anti oxidents are used.

⭐ foods are kept in a air tight container.

⭐chips bags are flushed with nitrogen.

6) ans:

To prevent rancidity.

7) ANS:

(a) Decomposition REACTION.

(b) exothermic reaction.

(c) Decomposition REACTION.

(d) Decomposition REACTION.

(e) thermal decomposition REACTION.

8)ans:plzz REFER TO THE ATTACHMENT.

9)ans: plzz refer to THE ATTACHMENT.

10)ans: PLZZ REFER TO THE ATTACHMENT.

11)ans:

(i)The substance ‘X’ which is used in white washing is calcium oxide or quick lime and its formula is CaO.

(i)The reaction involved is

CaO+ H2O gives Ca(OH)2

12)ans:

BECAUSE A LAYER OF MAGNISIUM OXIDE IS REMOVED IN ORDER TO GET CHEMICAL REACTION.