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प्रश्न
Fill in the following blank with suitable word:
The white powder formed when magnesium ribbon burns in oxygen is of ....................
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उत्तर
The white powder formed when a magnesium ribbon burns in oxygen is magnesium oxide.
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संबंधित प्रश्न
‘E’ is an element which reacts with oxygen to form an oxide E2O. An aqueous solution of E2O turns red litmus blue, so:
i. What is the nature of oxide E2O ?
ii. Write the name of element ‘E’.
Write the chemical reaction when iron reacts with dilute H2SO4.
A copper coin is kept immersed in a solution of silver nitrate for some time. What will happen to the coin and the colour of the solution?
Explain why, the surface of some metals acquires a dull appearance when exposed to air for a long time.
Complete and balance the following equation:
Na + O2 →
How do non-metals react with hydrogen? Explain with an example.
A copper plate was dipped in AgNO3 solution. After certain time, silver from the solution was deposited on the copper plate. State the reason why it happened. Give the chemical equation of the reaction involved.
Why does aluminium not react with water under ordinary conditions?
Write the chemical equation of the reaction which takes place when iron reacts with dilute sulphuric acid. What happens when the gas produced is ignited with a burning matchstick?
Write the equation for the reaction of Aluminium with dilute hydrochloric acid.
Name the products formed. Also indicate the physical states of all the substances involved.
Hydrogen is not a metal but still it has been assigned a place in the reactivity series of metals. Why?
Name one metal more reactive and another less reactive than hydrogen.
Out of the following oxides, the amphoteric oxide is:
(a) Fe2O3
(b) Al2O3
(c) P2O5
(d) N2O
The elements whose oxides can turn litmus solution red are:
(a) lithium and sodium
(b) copper and potassium
(c) carbon and hydrogen
(d) phosphorus and sulphur
Rewrite the following statement by selecting the correct option.
A solution of Al2(SO4)3 in water is _____________.
Write the chemical equation for the following reaction:
Calcium metal reacts with water.
Write the chemical equation for the following reaction:
Cinnabar is heated in the presence of air.
The substance that will be flattened on beating with a hammer is ______.
Metals are generally hard. Which of the following metals is an exception and can be cut with a knife?
