Advertisements
Advertisements
Question
Define the following term:
Precipitate
Advertisements
Solution
Chemical reactions which are characterised by the formation of insoluble solid substances are called precipitates.
APPEARS IN
RELATED QUESTIONS
How do the following help in bringing about a chemical change?
catalyst .
What do you observe when iron nail is kept in copper sulphate solution for sometime.
Fill in the blank:
The substances which undergo chemical change are called _______
What do you observe? When
Barium chloride is added to sodium sulphate solution
State the following reaction represent oxidation or reduction.
\[\ce{H->H+}\]
Arrange the following statements in correct sequence:
- One side is water-loving and other water-hating molecules.
- When you agitate the cloth, the dirt is surrounded by many molecules and taken away from the cloth.
- The dirt surrounded by the detergent molecules floats in the water making it dirty.
- Finally, the cloth is clean.
- The detergent molecules have two sides.
- Water hating goes and joins with dirt and oil in the cloth while the water-loving joins with the water molecules.
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
Classify the following as physical or chemical properties
Zinc dissolves in hydrochloric acid with the evolution of hydrogen gas.
Which of the following is/are true when milk changes into curd?
- Its state is changed from liquid to semi solid.
- It changes colour.
- It changes taste.
- The change cannot be reversed.
Choose the correct option from below:
Explain how the painting of an iron gate prevents it from rusting.
