Advertisements
Advertisements
प्रश्न
Which gas is produced when dilute hydrochloric acid is added to a reactive metal?
Advertisements
उत्तर
Hydrogen gas is evolved when dilute hydrochloric acid is added to a reactive metal.
\[\ce{\underset{Zinc}{Zn_{(s)}} + \underset{acid}{\underset{Hydrochloric}{2HCl(dil.)}}-> \underset{Zinc chloride}{ZnCl2_{(aq)}} + \underset{Hydrogen}{H2_{(g)}}}\]
Iron and dilute H2SO4 react as follows:
\[\ce{Fe_{(s)} + H2SO4(dil.) -> FeSO4_{(aq)} + H2_{(g)}}\]
APPEARS IN
संबंधित प्रश्न
Write equations for the reactions of iron with steam.
Show the formation of Na2O by the transfer of electrons.
Explain the following reaction with the help of a balanced chemical equation:
Magnesium reacts with hot water.
From amongst the metals sodium, calcium aluminium, copper and magnesium, name the metal:
(i) which reacts with water only on boiling, and
(ii) another which does not react even with steam.
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.
Complete and balance the following equation:
Complete and balance the following equation:
Cu (NO3)2 (aq) + Zn(s) →
Name two metals which can, however, liberate hydrogen gas from very dilute nitric acid.
What happens when calcium reacts with water? Write the chemical equation of the reaction of calcium with eater.
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.
Write the equation for the reaction of Zinc with dilute hydrochloric acid.
Name the products formed. Also indicate the physical states of all the substances involved.
Write the equation for the reaction of Iron with dilute hydrochloric acid.
Name the products formed. Also indicate the physical states of all the substances involved.
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:
(a) carbon
(b) sulphur
(c) chlorine
(d) phosphorus
An element X forms two oxides XO and XO2. The oxide XO is neutral but XO2 is acidic in nature. The element X is most likely to be:
(a) sulphur
(b) carbon
(c) calcium
(d) hydrogen
Write the chemical equation for the following reaction:
Cinnabar is heated in the presence of air.
Which property of metals is used for making bells and strings of musical instruments like Sitar and Violin?
Aluminium is used for making cooking utensils. Which of the following properties of aluminium are responsible for the same?
- Good thermal conductivity
- Good electrical conductivity
- Ductility
- High melting point
Generally, metals are solid in nature. Which one of the following metals is found in liquid state at room temperature?
An alkali metal A gives a compound B (molecular mass = 40) on reacting with water. The compound B gives a soluble compound C on treatment with aluminium oxide. Identify A, B and C and give the reaction involved.
