Question

$\huge\star\red{Sub-Chemistry}$

Make a solution of the unknown substances : add sodium hydroxide solution or ammonium hydroxide solution,
make observation and give your deduction.

Warming the mixture may be needed.

Choose from substances containing Ca²+, Fe²+,Fe³+,Pb²+,Zn²+,NH4+.​

Answer 1

Answer:

There ya go!!

Explanation:

(i) A bluish white precipitate appears which dissolves in excess of NH

4

OH and give an inky blue solution of tetra-amino copper sulphate.

(ii) A gelatinous white precipitate appears which dissolves in excess of NH

4

OH and give a clear transparent colourless solution of tetraamine zinc sulphate.

Answer 2

Answer:

a feeling that binds one to a person, thing, cause, ideal, or the like; devotion; regard: a fond attachment to his cousin; a profound attachment to the cause of peace. ... an enduring emotional bond that develops between one adult and another in an intimate relationship: romantic attachment

Explanation:

sister mera bio dekho