Advertisements
Advertisements
प्रश्न
Care must be taken while diluting concentrated nitric acid with water. Why?
उत्तर
A highly exothermic reaction occurs when an acid or a base dissolves in water. Mixing concentrated nitric acid with water requires caution. Always slowly pour the acid into the water while stirring constantly. The heat produced when water is added to a concentrated acid can cause the mixture to splash out and hurt people's bums. Additionally, excessive local heating could cause the glass container to shatter.
APPEARS IN
संबंधित प्रश्न
Explain givem equation, what happens when a mixture of Cu2O and Cu2S is heated?
Aluminum is used in thermite welding:
what is thermit?
Give the chemical formula of :
Bauxite
The following question relate to the extraction of aluminium by electrolysis.
Give the equation for the reaction which takes place at the cathode.
Usually ______ ores are subjected to ______ which is done in the absence of air.
Froth floatation process is generally used to concentrate ______ ores.
Name the following :
The Process of heating an ore to a high temperature in the presence of air.
Observe the given figure of reactivity series of metals and answer the following questions:
Reactivity series of metals
- Name two metals which react with water.
- Name two moderately reactive metals.
- Name the most highly reactive metal and the most less reactive metal.
Read the following passage and answer the questions.
According to the reactivity series, zinc is more reactive than iron, iron is more reactive than silver. During study of this, a student dipped the iron nails in silver nitrate solution.
- What is reactivity series?
- What will happen when iron nails are dipped in silver nitrate solution?
- Which type of reaction happens when iron metal reacts with silver nitrate solution?
- What will happen if a zinc rod is used instead of iron nail?
- Given below are the steps for extraction of copper from its ore. Write the reaction involved.
- Roasting of copper (I) sulphide
- Reduction of copper (I) oxide with copper (I) sulphide.
- Electrolytic refining
- Draw a neat and well labelled diagram for electrolytic refining of copper
