Advertisements
Advertisements
प्रश्न
Fill in the blank
When a piece of copper is added to silver nitrate solution, it turns ............in colour.
Advertisements
उत्तर
When a piece of copper is added to silver nitrate solution, it turns blue in colour.
APPEARS IN
संबंधित प्रश्न
How will you obtain Magnesium oxide from magnesium.
Also give balanced equations for the reactions
What do you observe when magnesium ribbon is burnt in oxygen?
Write chemical equation for the event.
Electrolysis of alumina is done.
Write a chemical equation for the following event.
Zinc oxide is dissolved in dilute hydrochloric acid.
State what is meant by the ‘reactivity series of metals’
Select the correct answer for the statement given below:
A neutral oxide which does not react with an acid or a base to give salt and water.
Explain the following reaction with the balanced equation.
Magnesium reacts with dil HCl
A metal M does not liberate hydrogen from acids but reacts with oxygen to give a black colour product. Identify M and black coloured product and also explain the reaction of M with oxygen.
Arrange the following as per the instruction given in the bracket:
Al, K, Mg, Ca (decreasing order of its reactivity)
Three metal samples of magnesium, aluminium and iron were taken and rubbed with sandpaper. These samples were then put separately in test tubes containing dilute hydrochloric acid. Thermometers were also suspended in each test tube so that their bulbs dipped in the acid. The rate of formation of bubbles was observed. The above activity was repeated with dilute nitric acid and the observations were recorded.
Answer the following questions:
(i) When the activity was done with dilute hydrochloric acid, then in which one of the test tubes was the rate of formation of bubbles the fastest and the thermometer showed the highest temperature?
(ii) Which metal did not react with dilute hydrochloric acid? Give reason.
(iii) Why is hydrogen gas not evolved when a metal reacts with dilute nitric acid? Name the ultimate products formed in the reaction.
OR
Name the type of reaction on the basis of which the reactivity of metals is decided. You have two metals X and Y. How would you decide which is more reactive than the other?
