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- 1. Multiple Choice
Which of the following statements about freezing as a method of food preservation is INCORRECT?
It helps to slow down the growth of food spoiling bacteria.
It kills the bacteria present in the food.
It helps to slow down the enzyme activity of food spoiling bacteria
The water inside the food freezes into ice crystals
- 2. Multiple Choice
What food preservation technique has been used here?
Freezing.
Drying.
Salting.
- 3. Multiple Choice
It is the removal of the moisture content of the food.
Drying
Freezing
Salting
- 4. Multiple Choice
Assertion: Pasteurisation is the method to preserve milk.
Reason: In pasteurisation, the milk is heated to high temperature and cool down slowly.
Both A and R are true and R is the correct explanation of A.
Both A and R are true but R is not the correct explanation of A.
A is true but R is false. A is false but R is true.
Both A and R are false.
- 5. Multiple Choice
Assertion: Adding salt preserves the meat and fish for ages.
Reason: Salt draws water out of food and dehydrates the food.
Both A and R are true and R is the correct explanation of A.
Both A and R are true but R is not the correct explanation of A.
A is true but R is false. A is false but R is true.
Both A and R are false.
- 6. Multiple Choice
Which of the following is considered a physical property of an element?
density
color
conductivity
flammable
- 7. Multiple Choice
Malleability is a physical property. It means . . .
a solid element can be crushed into a powder.
a solid piece of metal can be hammered into a shape.
a solid piece of metal can be pulled into a wire.
a solid can be melted to a liquid.
- 8. Multiple ChoiceWhich of the following is a property of a non-metal?Conducts electricity and heats wellCan be hammered into thin sheetsIs brittle and breaks easilyHas a shiny, metallic luster
- 9. Multiple Choice
Assertion: Mercury is widely used in clinical thermometer.
Reason: Mercury is solid at room temperature.
Both A and R are true and R is the correct explanation of A.
Both A and R are true but R is not the correct explanation of A.
A is true but R is false. A is false but R is true.
Both A and R are false.
- 10. Multiple Choice
Assertion: Copper used widely to conduct electricity.
Reason: Silver has the highest electrical conductivity of all metals.
Both A and R are true and R is the correct explanation of A.
Both A and R are true but R is not the correct explanation of A.
A is true but R is false. A is false but R is true.
Both A and R are false.
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