Advertisements
Advertisements
प्रश्न
Phenolphthalein is a synthetic type of indicator.
पर्याय
True
False
Advertisements
उत्तर
Phenolphthalein is a synthetic type of indicator - True
APPEARS IN
संबंधित प्रश्न
When phenolphthalein is added to NaOH, the colour of the solution will become _________.
- colourless
- red
- pink
- yellow
Metal compound A reacts with dilute hydrochloric acid to produce effervescence. The gas evolved extinguishes a burning candle. Write a balanced chemical equation for the reaction if one of the compounds formed is calcium chloride.
Why do HCl, HNO3, etc., show acidic characters in aqueous solutions while solutions of compounds like alcohol and glucose do not show acidic character?
Complete and balance the following chemical equation:
\[\ce{NaOH_{(aq)} + HCl_{(aq)} ->}\]
Give chemical equation of the reaction involved.
What is a neutralisation reaction? Explain with an example. Give the chemical equation of the reaction which takes place.
What happens when an acid reacts with a metal carbonate? Explain with the help of an example. Write chemical equation of the reaction involved.
With the help of labelled diagrams, describe an activity to show that acids produce ions only in aqueous solutions.
Explain the following:
Lead carbonate does not react with dilute HCl.
When _______________ is passed through fresh lime water, it turns milky.
Acids turn blue litmus paper to ______.
Egg shell is made up of ____________.
Which of the following salts does not contain any water of crystallisation?
Which of the following are present in a dilute aqueous solution of hydrochloric acid?
Acids present in fruits and vegetables are called ______ acids.
Can we taste acids and bases to identify them?
Take a clean test tube with a holder and pour some dilute hydrochloric acid. Add a few pieces of magnesium ribbon pieces slowly. What do you observe? Now show a burning match stick near the mouth of the test tube. Do you hear any sound? The gas burns with a pop sound. From this, it is observed that hydrogen gas has been formed due to the reaction between acid and metal.
