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प्रश्न
| Column A | Column B | ||
| i | eosin | 1 | losing hydrogen |
| ii | oxidation | 2 | synthetic indicator |
| 3 | losing oxygen | ||
| 4 | natural indicator |
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उत्तर
| Column A | Answers | ||
| i | eosin | 2 | synthetic indicator |
| ii | oxidation | 1 | losing hydrogen |
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संबंधित प्रश्न
Dilute NaOH can be tested with
(a) red litmus paper
(b) blue litmus paper
(c) lime water
(d) Na2CO3
What do we observe on pouring acetic acid on red and blue litmus papers?
(A) Red litmus remains red and blue litmus turns red.
(B) Red litmus turns blue and blue litmus remains blue.
(C) Red litmus turns blue and blue litmus turns red.
(D) Red litmus becomes colourless and blue litmus remains blue.
A solution reacts with crushed egg-shells to give a gas that turns lime-water milky. The solution contains ______.
The litmus paper or the litmus solution is obtained from ________ plant
(A) Moss
(B) Lichen
(C) Rose
(D) Hibiscus
Complete and balance the following chemical equation:
\[\ce{Zn_{(s)} + HCl_{(aq)} ->}\]
Complete and balance the following chemical equation:
\[\ce{CuO_{(s)} + HCl_{(aq)} ->}\]
What would be the colour of litmus in a solution of sodium carbonate?
With which substance should chlorine be treated to get bleaching powder?
Name the product formed when Cl2 and H2 produced during the electrolysis of brine are made to combine.
Read the following statements:
I. When a red litmus paper is dipped into reaction mixture of a saponification reaction, it turns blue and the reaction is exothermic.
II. When a blue litmus paper is dipped into reaction mixture of a saponification reaction, its colour does not change and the reaction is exothermic.
III. When a red litmus paper is dipped into reaction mixture of a saponification reaction, its colour does not change and the reaction is endothermic.
IV. When a blue litmus paper is dipped into reaction mixture of a saponification reaction, its colour does not change and the reaction is endothermic.
Which of the above statements are correct:
(A) I, and II
(B) II and III
(C) III and IV
(D) I and IV
What is a neutralization reaction? Give an example.
Calcium phosphate is present in tooth enamel. Its nature is
Which of the following is used for dissolution of gold?
Which of the following statements is true for acids?
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.
A salt may be ______.
______ & ______ metals do not react with HCl or HNO3.
Write notes on the properties of acids.
The metal that will not produce hydrogen gas when reacted with dilute acids.
