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प्रश्न
Give an example of the following chemical change.
Two solids combine to form a liquid
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उत्तर
C(s) + 2S(g) → CS2(l)
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संबंधित प्रश्न
Complete and balance the following chemical equations:
Fe `"SO"_4` + NaOH `→`
(aq.) (aq.)
FILL IN THE BLANK
The new substances formed during a chemical reaction are called the ..................
Match the pairs.
| a. | Photosynthesis | i. | Tendency to lose electrons |
| b. | Water | ii. | Reactant in combustion process |
| c. | Sodium chloride | iii. | Chemical change |
| d. | Dissolution of salt in water | iv. | Covalent bond |
| e. | Carbon | v. | Ionic bond |
| f. | Fluorine | vi. | Physical change |
| g. | Magnesium | vii. | Tendency to form anion |
Name: A greenish-yellow gas.
Give a word equation for the following reaction.
Two gases which combine to give a solid.
______ is not a chemical change.
Which of the following is not an “element + element → compound” type reaction?
Silver articles turning black: ______:: Boiling of H2O: physical change ______.
Two chemical species X and Y combine together to form a product P which contains both X and Y
\[\ce{X + Y -> P}\]
X and Y cannot be broken down into simpler substances by simple chemical reactions. Which of the following concerning the species X, Y and P are correct?
(i) P is a compound
(ii) X and Y are compounds
(iii) X and Y are elements
(iv) P has a fixed composition
______ is a chemical substance is used in whitewashing.
