science
Grade-5
Easy
Question
What helps corrosion?
- Water
- Moisture
- Oxygen
- All of the above
Hint:
Corrosion happens when metals are exposed in air.
The correct answer is: All of the above
- Oxygen reacts with metals to form oxides leading to corrosion.
- Water and moisture helps in corrosion as more water on the surface increases the rate of corrosion.
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Pick the odd one out
Pick the odd one out
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Direction
Choose the correct option from the sentences below.
Statement A: Rust is iron oxide, silver tarnish is silver sulfide, and copper tarnish is copper oxide.
Statement B: Corrosion is the gradual “eating away” of a metal.
Direction
Choose the correct option from the sentences below.
Statement A: Rust is iron oxide, silver tarnish is silver sulfide, and copper tarnish is copper oxide.
Statement B: Corrosion is the gradual “eating away” of a metal.
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Identify a compound from the following:
Identify a compound from the following:
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Silver tarnish is
Silver tarnish is
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Rust is
Rust is
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During the process of corrosion
During the process of corrosion
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Corrosion ________ metals.
Corrosion ________ metals.
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Jewelry and other objects made with these as pure metals would not be worn very well.
Jewelry and other objects made with these as pure metals would not be worn very well.
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What does malleable mean?
What does malleable mean?
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Complete the following analogy.
Plastics used for storing soft drinks: PET :: Plastic on which oil and water do not stick: _______
Plastics used for storing soft drinks: PET :: Plastic on which oil and water do not stick: _______
Complete the following analogy.
Plastics used for storing soft drinks: PET :: Plastic on which oil and water do not stick: _______
Plastics used for storing soft drinks: PET :: Plastic on which oil and water do not stick: _______
scienceGrade-5
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Which of the following applications of plastics show(s) that plastics are bad conductors of electricity?
I. Chemicals are stored in plastic containers.
II. Umbrellas are made from plastics.
III. Electric wires have a plastic coating.
iv. Refrigerators have insulating wool of plastics
I. Chemicals are stored in plastic containers.
II. Umbrellas are made from plastics.
III. Electric wires have a plastic coating.
iv. Refrigerators have insulating wool of plastics
Which of the following applications of plastics show(s) that plastics are bad conductors of electricity?
I. Chemicals are stored in plastic containers.
II. Umbrellas are made from plastics.
III. Electric wires have a plastic coating.
iv. Refrigerators have insulating wool of plastics
I. Chemicals are stored in plastic containers.
II. Umbrellas are made from plastics.
III. Electric wires have a plastic coating.
iv. Refrigerators have insulating wool of plastics
scienceGrade-5
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Which of the following options is correct for the following statements?
(i). Plastics are generally poor conductors of electricity.
(ii). Melamine is a special plastic on which oil and water do not stick.
(iii). Ropes made by Bakelite are used in cranes and elevators
(i). Plastics are generally poor conductors of electricity.
(ii). Melamine is a special plastic on which oil and water do not stick.
(iii). Ropes made by Bakelite are used in cranes and elevators
Which of the following options is correct for the following statements?
(i). Plastics are generally poor conductors of electricity.
(ii). Melamine is a special plastic on which oil and water do not stick.
(iii). Ropes made by Bakelite are used in cranes and elevators
(i). Plastics are generally poor conductors of electricity.
(ii). Melamine is a special plastic on which oil and water do not stick.
(iii). Ropes made by Bakelite are used in cranes and elevators
scienceGrade-5
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Which of the following is the advantage of plastics?
Which of the following is the advantage of plastics?
scienceGrade-5
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Like synthetic fibers, plastic is also a ……
Like synthetic fibers, plastic is also a ……
scienceGrade-5
