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प्रश्न
The litmus paper or the litmus solution is obtained from ________ plant
(A) Moss
(B) Lichen
(C) Rose
(D) Hibiscus
उत्तर
Lichen
APPEARS IN
संबंधित प्रश्न
Equal lengths of magnesium ribbons are taken in test tubes A and B. Hydrochloric acid (HCl) is added to test tube A, while acetic acid (CH3COOH) is added to test tube B. In which test tube will the fizzing occur more vigorously, and why?
Complete and balance the followingchemicalequations:
NaHCO3 (S) + HCI (aq) →
What happens when an acid reacts with a metal?
Give 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.
On adding dilute hydrochloric acid to copper oxide powder, the solution formed is blue-green.
Predict the new compound formed which imparts a blue-green colour to solution.
What ions are present in the solutions of following substances? (write the symbols only)
Sulphuric acid
What ions are present in the solutions of following substances? (write the symbols only)
Potassium hydroxide
What ions are present in the solutions of following substances? (write the symbols only)
Magnesium hydroxide
What is the chemical formula of baking soda?
What happens when a solution of sodium hydrogencarbonate is heated? Write equation of the reaction involved.
Explain the following:
Lead carbonate does not react with dilute HCl.
Answer the following question.
Identify the acid and base which form sodium hydrogen carbonate. Write the chemical equation in support of your answer. State whether this compound is acidic, basic, or neutral. Also, write its pH value.
Magnesium hydroxides are used for treating _______
Which of the following gives the correct increasing order of acidic strength?
A sulphate salt of Group 2 element of the Periodic Table is a white, soft substance which can be moulded into different shapes by making its dough. When this compound is left in open for some time, it becomes a solid mass and cannot be used for moulding purposes. Identify the sulphate salt. Why does it show such a behaviour? Give the reaction involved.
Acids present in fruits and vegetables are called ______ acids.
A salt may be ______.
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.
Consider the following salt:
NH4X
If in salt NH4X, X is nitrate, then its solution will give what colour with a universal indicator? Why?
