Advertisements
Advertisements
Question
How is an acid prepared from a non metal and a base from a metal? Give equation.
Advertisements
Solution
Acid from a non metal:
Certain non metals like sulphur (S), phosphorous(P), can be oxidized by concentrated nitric acid to yield corresponding acid.
Non metal + Acid → Acid + water + Oxide
S + 6HNO3 → H2SO4 + 2H2O + 6NO2
Base from a metal :
Active metals like K, Na, Ca react with water to produce water soluble bases. These bases are called alkalis.
Active metal + water → Base/Alkali + Hydrogen
2Na + 2H2O → 2NaOH + H2.
APPEARS IN
RELATED QUESTIONS
Name the source from which litmus solution is obtained. What is the use of this solution?
Why is it wrong to treat a bee sting with vinegar?
What type of ions is formed when an acid is dissolved in water?
Give two examples of the following:
monobasic acid
What is the difference between an alkali and a base?
Choosing the correct words given in brackets, complete the sentence given below:
An acid is a compound which, when dissolved in water gives ______ ( hydronium / hydroxide) ions as the only ______ (positive/negative) ions.
State whether the following statement is true or false. Correct the false statement.
All substances are either acidic or basic.
State whether the following statement is true or false. Correct the false statement.
A compound if acidic will turn all indicators red.
Fill in the cross word given in figure with the help of the clues provided.
Across
(2) The solution which does not change the colour of either red or blue litmus.
(4) Phenolphthalein gives pink colour in this type of solution.
(7) Colour of blue litmus in lemon juice.
Down
(1) It is used to test whether a substance is acidic or basic.
(3) It is a natural indicator and gives pink colour in basic solution.
(5) Nature of ant’s sting.
(6) It is responsible for the increase in temperature during a neutralisation reaction.
You are provided with four test tubes containing sugar solution, baking soda solution, tamarind solution, salt solution. Write down an activity to find the nature (acidic/basic/neutral) of each solution.
