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प्रश्न
State whether the following statement is true or false:
Non-metals react with dilute acids to produce a gas which burns with a 'pop' sound.
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उत्तर
False. Metals react with dilute acids to produce hydrogen gas that burns with a 'pop' sound.
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संबंधित प्रश्न
Name the following:
Metals which forms an amphoteric oxide.
Write the electron-dot structures for sodium, oxygen and magnesium.
An element reacts with oxygen to give a compound with a high melting point. This compound is also soluble in water. The element is likely to be:
The solution of Aluminium sulphate in water is .....................
(a) Green
(b) Colourless
(c) Pink
(d) Blue
A solution of _________________ in water is green in colour.
(a) CuSO4
(b) FeSO4
(c) ZnSO4
(d) Al2(SO4)3
Which of the two metals is more reactive: copper or silver?
With the help of examples, describe how metal oxides differ from non-metal oxides.
Which of the following elements would yield an acidic oxide.
Na, S, C, K, H
How do non-metals react with hydrogen? Explain with an example.
Name two metals (other than zinc and iron) which can displace hydrogen from dilute hydrochloric acid?
Name one metal which displaces copper from copper sulphate solution and one which does not.
An acidic oxide is produced by the element:
(a) Na
(b) C
(c) Ca
(d) H
Which one of the following four metals would be displaced from the solution of its salt by the other three metals?
(a) Zn
(b) Ag
(c) Cu
(d) Mg
An element is soft and can be cut with a knife. If is very reactive and cannot be kept open in the air. It reacts vigorously with water. The element is most likely to be:
(a) Mg
(b) S
(c) P
(d) Na
Write the name and formula of a molecule made up of three atoms of oxygen.
Choose the correct alternative and rewrite the following:
Reaction of iron nails whith copper sulphate solution is an example of _____________________
Write the chemical equation for the following reaction:
Calcium metal reacts with water.
Write the chemical equation for the following reaction:
Manganese dioxide is heated with aluminum powder.
Which property of metals is used for making bells and strings of musical instruments like Sitar and Violin?
Metals are generally solid. Which of the following metals is in the liquid state at room temperature?
