Prelims Power Play 30 January 2023

1. Due to their extensive rice cultivation, some regions may be contributing to global warming. To what possible reason/reasons are this attributable?

1. The anaerobic conditions associated with rice cultivation cause the emission of methane.
2. When nitrogen-based fertilizers are used, nitrous oxide is emitted from the cultivated soil.

Which of the statements given above is/are correct?

2. Consider the following statements with respect to polar vortex:

1. It is a band of strong westerly winds that forms in the stratosphere between about 10 and 30 miles above the North Pole every summer.
2. It encloses a large pool of extremely cold air.
3. The weakening of polar vortex leads to its sinking down into midlatitude.

Which of the statements given above is/are correct?

3. Consider which of the following statements are true regarding bond yield?

1. A rise in bond yields means interest rates in the monetary system have fallen
2. A rise in bond yield means the returns for investors (those who invested in bonds and govt securities) have declined.

4. Consider the following statement regarding Dementia 

1. Dementia is caused due to the damage and death of brain cells.
2. Dementia will leads to loss of memory, problem-solving and other thinking abilities but not the loss of speech language.
3. Dementia mainly affects older people, but it is not a normal part of ageing.

Which of the statements given above is/are correct?

5. Song city refers to