Advertisements
Advertisements
प्रश्न
From amongst the metals sodium, calcium, aluminium, copper and magnesium, name the metal:
- which reacts with water only on boiling, and
- another which does not react even with steam.
Advertisements
उत्तर
- Magnesium
- Copper
APPEARS IN
संबंधित प्रश्न
Write the chemical reaction when iron reacts with dilute H2SO4.
Why are metals called electropositive elements?
What changes in the colour of iron nails and copper sulphate solution do you observe after keeping the iron nails dipped in copper sulphate solution for about 30 minutes?
Name the metal which has been placed at the bottom of the reactivity series.
Which of the two metals is more reactive?
Copper or silver
What type of oxides are formed when metals combine with oxygen? Explain with the help of an example.
Arrange the following metals in order of their chemical reactivity, placing the most reactive metal first:
Magnesium, Copper, Iron, Sodium, Zinc, Lead, Calcium
What is the action of water on aluminium? Write the equation of the chemical reaction involved.
Name one metal which displaces silver from a silver nitrate solution.
Which non-metal has been placed in the reactivity series of metals?
The elements whose oxides can turn phenolphthalein solution pink are ______.
The least reactive metal among the following is:
An element X reacts with hydrogen, when heated, to form a covalent hydride H2X. If H2X has a smell of rotten eggs, the element X is likely to be ______.
If A, B, C, D, E, F, G, H, I, J and K represent metals in the decreasing order of their reactivity, which one of them is most likely to occur in a free state in nature?
Write the name and formula of a molecule made up of three atoms of oxygen.
Write a chemical equation to illustrate the use of aluminium for joining cracked railway lines.
Where does the metal aluminium, used in the thermit process, occurs in the reactivity series of metals?
Write the chemical equation for the following reaction:
Calcium metal reacts with water.
An element X is soft and can be cut with a knife. This is very reactive to air and cannot be kept open in the air. It reacts vigorously with water. Identify the element from the following.
Generally metals react with acids to give salt and hydrogen gas. Which of the following acids does not give hydrogen gas on reacting with metals (except Mn and Mg)?
