Advertisements
Advertisements
Question
The metal M reacts vigorously with water to form a solution S and a gas G. The solution S turns red litmus to blue whereas gas G, which is lighter than air, burns with a pop sound. Metal M has a low melting point and it is used as a coolant in nuclear reactors.
- What is metal M?
- What is solution S? Is it acidic or alkaline?
- What is gas G?
- Write a balanced chemical equation for the reaction which takes place when metal M reacts with water.
- Is this reaction exothermic or endothermic?
Advertisements
Solution
- Metal M is sodium (Na), which is used as a coolant in nuclear reactors.
- Solution S is a sodium hydroxide solution (NaOH). It is alkaline; it turns red litmus to blue.
- Gas G is hydrogen gas, which is lighter than air.
- \[\ce{2Na_{(s)} + 2H2O_{(l)} -> 2NaOH_{(aq)} + H2_{(g)} + HEAT}\]
- This reaction is exothermic because it releases excessive heat.
APPEARS IN
RELATED QUESTIONS
Translate the following statement into chemical equation and then balance it.
Hydrogen gas combines with nitrogen to form ammonia
Translate the following statement into a chemical equation and then balance it.
Barium chloride reacts with aluminium sulphate to give aluminium chloride and a precipitate of barium sulphate.
Find the odd man out:
Turmeric, Methyl Orange, Rose petals, Beetroot.
Translate the following statement into a chemical equation and then balance the equation:
Barium chloride reacts with zinc sulphate to give zinc chloride and barium sulphate.
When hydrogen is passed over copper oxide, copper and steam are formed. Write a balanced equation for this reaction and state which of the chemicals are reactants.
Write a balanced chemical equation with state symbols for the following reaction:
Sodium hydroxide solution reacts with hydrochloric acid solution to produce sodium chloride solution and water.
With the help of an appropriate example, justify that some of the chemical reactions are determined by a change in temperature.
Give a chemical equation for the reaction involved in the above case.
State one characteristic of the chemical reaction which takes place when dilute sulphuric acid is added to barium chloride solution.
Write your observation and name the product when ron nails are added to an aqueous solution of copper sulphate.
Dry raisins were soaked in water for 2 hours, to determine the percentage of water absorbed by raisins. Before final weighing of swollen raisins, the extra water left on the surface of soaked raisins was removed by:
Balance the following equation:
Zn + HNO3 `→` Zn(NO3)2 + H2O + NO2
Why should an equation be balanced? Explain with the help of a simple equation.
How is a flame test performed?
Name the following:
The gas evolved when a dilute acid is added to chalk [limestone].
Give an example of a chemical equation in which two reactants form:
four product
Balance the following simple equation:
Zn + HCl → ZnCl2 + H2
Underline the compound in the equation given below, it is incorrectly balanced and write the correct balancing for the same.
NaOH + CO2 → Na2CO3 + H2O
What is a chemical equation?
Which of the following are exothermic processes?
- Reaction of water with quick lime
- Dilution of an acid
- Evaporation of water
- Sublimation of camphor (crystals)
