Question

Q1. write the balanced chemical equation for the following reaction:-. (i)sodium reacts with oxygen (ii)ammonium reacts with dilute hydrochloric acid Q2. why are gold and Platinum suitable for making jewellery ? Q3.Sodium and potassium is stored under kerosene give reasons ? Q4.why is bronze preferred over copper metal for making statues ?​

Answer 1

Answer:

2Na+O2=2NaO, Al+2HCl=AlCl2 +H2.

Answer 2

Answer:

1.i) 4Na+O2 ------ 2Na2O

ii. 2AI +6HCL------ 2AICI3+3H2

2.they are suitable for making jewellery because they never dulls nor corrodes and is easily shaped.

3.they stored under kerosene because kerosene contains no water and protects these metals from being exposed to any moisture in the air and stops to react violently.

4.bronze preferred over copper metal for making statues as it is favourite metal for artists. it is hard and resists corrosion well. it's statues withstand exposure to weather without damage.

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