Science, asked by Deeps9509, 1 year ago

give one example of each

1) chemical reaction showing evolution of gas

2) change in colour of a substance during chemical reaction

Answers

Answered by Anonymous
2
1) Zinc + Hydrochloric acid --> Zinc chloride + Hydrogen gas.

2) Chlorine water + Potassium iodide --> Potassium chloride + Iodide

Here which Chlorine water (yellowish) is added to potassium iodide (colourless) a brown solution is obtained.
Previous Question
Next Question
Similar questions
Science, 7 months ago
what's the actual mass of electron​...
Science, 7 months ago
at time for sunset , when we are seeing the sun at the horizon, the actual position of the sun is;​...
Social Sciences, 7 months ago
who is the first prime minister in the America ​...
Science, 1 year ago
when hydrogen is passed over copper oxide,copper and steam are formed. write a balanced equation for this reaction and state which of the chemicals are (i)elements (ii)compounds (iii)reactants (iv)products (v)metals (vi)non-metals...
Science, 1 year ago
A silver metal X taken in the form of a ribbon,when ignited,burns in air with a dazzling white flame to form a white powder Y.when water is added to power Y , it dissolves partially to form another substance Z a. what could metal X be?? b. what is powder Y? c. with which substances metal X combines to form powder Y? d. what is substance Z? name one domestic use of this substance?
Social Sciences, 1 year ago
what are the factor that affect the life of postural group of Rajasthan...
English, 1 year ago
what is the past of sing.
Hindi, 1 year ago
please answer the question...