IASbaba's Daily Static Quiz
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DAILY STATIC QUIZ will cover all the topics of Static/Core subjects – Polity, History, Geography, Economics, Environment and Science and technology.
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UPSC Static Quiz - 2020: IASbaba's Daily Static Quiz - SCIENCE & TECHNOLOGY [Day 78]
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Question 1 of 10
1. Question
Consider the following statements:
- Plastics which when moulded once cannot be softened by heating are called thermoplastics.
- The uniforms of firemen have coating of melamine plastic to make them flame resistant.
Which of the statements given above is/are correct?
Correct
Solution (b)
Plastic which gets deformed easily on heating and can be bent easily are known as Thermoplastics. Polythene and PVC are some of the examples of Thermoplastics.
Plastics which when moulded once cannot be softened by heating. These are called Thermosetting Plastics. Two examples are Bakelite and Melamine.
Hence statement 1 incorrect
Although Synthetic Fibre catches fire easily, the uniforms of firemen have coating of melamine plastic to make them flame resistant.
Hence statement 2 correct
Incorrect
Solution (b)
Plastic which gets deformed easily on heating and can be bent easily are known as Thermoplastics. Polythene and PVC are some of the examples of Thermoplastics.
Plastics which when moulded once cannot be softened by heating. These are called Thermosetting Plastics. Two examples are Bakelite and Melamine.
Hence statement 1 incorrect
Although Synthetic Fibre catches fire easily, the uniforms of firemen have coating of melamine plastic to make them flame resistant.
Hence statement 2 correct
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Question 2 of 10
2. Question
Consider the following statements:
- Mercury is the only metal which is found in liquid state at room temperature.
- Sulphur is stored in kerosene as it is a very highly reactive metal.
Which of the statements given above is/are correct?
Correct
Solution (a)
Mercury is the only metal which is found in liquid state at room temperature.
Hence statement 1 is correct
Sodium is stored in kerosene as it is a very highly reactive metal. If it is kept in open air, it easily reacts with the oxygen and catches fire. Since kerosene is a mixture of hydrocarbons, it won’t react with it.
Hence statement 2 is incorrect
Incorrect
Solution (a)
Mercury is the only metal which is found in liquid state at room temperature.
Hence statement 1 is correct
Sodium is stored in kerosene as it is a very highly reactive metal. If it is kept in open air, it easily reacts with the oxygen and catches fire. Since kerosene is a mixture of hydrocarbons, it won’t react with it.
Hence statement 2 is incorrect
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Question 3 of 10
3. Question
Consider the following statements:
- Burning of coal and diesel releases sulphur dioxide gas
- Petrol engines give off gaseous oxides of nitrogen
- Burning coal in a closed room releases carbon monoxide gas, which can kill persons sleeping in that room.
Which of the statements given above is/are correct?
Correct
Solution (d)
Burning of coal and diesel releases sulphur dioxide gas
Hence statement 1 is correct
Petrol engines give off gaseous oxides of nitrogen
Hence statement 2 is correct
Burning coal in a closed room releases carbon monoxide gas, which can kill persons sleeping in that room.
Hence statement 3 is correct
Incorrect
Solution (d)
Burning of coal and diesel releases sulphur dioxide gas
Hence statement 1 is correct
Petrol engines give off gaseous oxides of nitrogen
Hence statement 2 is correct
Burning coal in a closed room releases carbon monoxide gas, which can kill persons sleeping in that room.
Hence statement 3 is correct
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Question 4 of 10
4. Question
Consider the following pairs:
Name of the acid/base :: Found in
- Lactic Acid :: Curd
- Oxalic Acid :: Ant’s sting
- Sodium hydroxide :: Soap
- Potassium hydroxide :: Sanitizers
Which of the pairs given above is/are correctly matched?
Correct
Solution (a)
Name of the acid/base :: Found in
- Lactic Acid :: Curd
- Oxalic Acid :: Spinach
- Sodium hydroxide :: Soap
- Potassium hydroxide :: Sanitizers
Ant’s sting has Formic Acid.
Incorrect
Solution (a)
Name of the acid/base :: Found in
- Lactic Acid :: Curd
- Oxalic Acid :: Spinach
- Sodium hydroxide :: Soap
- Potassium hydroxide :: Sanitizers
Ant’s sting has Formic Acid.
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Question 5 of 10
5. Question
Which of the following Polymer is used in making parachutes?
Correct
Solution (a)
Nylon is used for making parachutes and ropes for rock climbing. A nylon thread is actually stronger than a steel wire.
Hence Option a is correct
Incorrect
Solution (a)
Nylon is used for making parachutes and ropes for rock climbing. A nylon thread is actually stronger than a steel wire.
Hence Option a is correct
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Question 6 of 10
6. Question
Which of the following reactions are irreversible chemical changes:
- Rusting of Iron
- Cooking of food
- Fermentation of grapes
- Formation of ozone
Select the correct code from the following:
Correct
Solution (a)
Formation of Ozone is a reversible process. Once an ozone molecule is formed, it breaks again into oxygen gas(O2) and Oxygen molecule(O).
Incorrect
Solution (a)
Formation of Ozone is a reversible process. Once an ozone molecule is formed, it breaks again into oxygen gas(O2) and Oxygen molecule(O).
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Question 7 of 10
7. Question
Which of the following processes are exothermic i.e. they release energy?
- Burning of coal
- Respiration
- Decomposition of vegetables to form compost
Select the code from the following:
Correct
Solution (d)
In the process of respiration, the food we eat reacts with the oxygen we breathe and releases energy. Note: all the three examples are taken from class X NCERT.
Incorrect
Solution (d)
In the process of respiration, the food we eat reacts with the oxygen we breathe and releases energy. Note: all the three examples are taken from class X NCERT.
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Question 8 of 10
8. Question
If someone is suffering from the problem of acidity. What is the ideal thing he should take to have relief?
Correct
Solution (c)
Baking soda solution is a basic solution which helps in nutralising the acidity. Other three are acidic which will aggravate the problem.
Incorrect
Solution (c)
Baking soda solution is a basic solution which helps in nutralising the acidity. Other three are acidic which will aggravate the problem.
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Question 9 of 10
9. Question
Consider the following statements:
- Distilled water does not conduct electricity.
- The pH of distilled water is seven.
Which of the above statements are correct?
Correct
Solution (c)
Distilled water is pure water and does not contain any salt ions. Pure water is a bad conductor of electricity.
Distilled water is neither acidic nor basic. The pH value is 7.
Incorrect
Solution (c)
Distilled water is pure water and does not contain any salt ions. Pure water is a bad conductor of electricity.
Distilled water is neither acidic nor basic. The pH value is 7.
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Question 10 of 10
10. Question
Copper was the first metal to be used by mankind on a large scale. What was the correct reason behind that?
Correct
Solution (a)
Copper was accidentally discovered by man. It was extensively used as it was easy to extract it from its ore. (Just by heating)
Incorrect
Solution (a)
Copper was accidentally discovered by man. It was extensively used as it was easy to extract it from its ore. (Just by heating)
