Salts

Q. What is the common name for sodium bicarbonate?

1. Baking soda
2. Slaked lime
3. Milk of magnesia
4. Quick lime

Q. Two salts react with each other to form:

1. Two new salts
2. Salt and water
3. Salt and hydrogen gas
4. Salt and oxygen gas

Q. Which of the following is basic in nature?

1. Caustic soda
2. Curd
3. Lemon
4. Apple

Q. Which amongst the following separation techniques can be used to seperate salt from seawater?

1. Decantation
2. Sedimentation
3. Filtration
4. Evaporation

Q. Substances that get completely dissolved in water are termed as insoluble substances.

1. True
2. False

Q. Sugar dissolves easily in water as there is no space between the water molecules.

1. True
2. False

Q.

Give the chemical name and formula of Baking soda.

Q. Assertion :A greenish layer appears on copper vessels, if left uncleaned. Reason: It is due to the formation of a layer of basic copper carbonate.

1. Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
2. Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
3. Assertion is correct but Reason is incorrect
4. Both Assertion and Reason are incorrect

Q. Identify the materials that would completely dissolve in water.

1. Sugar
2. Iron nail
3. Salt
4. Oil
5. Vinegar
6. Chalk
7. Lemon juice
8. Coffee powder