PPSC GK PYQ

31. Which of the following is/are correct about major factors which affect the fertility rates?

1. It is inversely related to per capita income and literacy rate

2. It is high in countries with balanced sex ratio

3. Better diet and quality of life positively affect birth rate

4. High female work participation in non-agriculture economy has adverse impact on birth rate




Answer & Solution
Answer:

Only 1 and 4 are true

Solution:

  • Fertility rates are inversely related to per capita income and literacy rate: Higher income and education levels typically lead to lower fertility rates as people focus more on careers and quality of life.
  • Balanced sex ratio does not necessarily lead to high fertility rates: Other social, cultural, and economic factors play a more significant role.
  • Better diet and quality of life do not positively affect birth rates: These factors generally lead to better child survival rates rather than higher birth rates.
  • High female work participation in non-agricultural sectors lowers fertility rates: Women in these sectors often delay childbirth or have fewer children due to career commitments.

32. Assertion: (A): Rotation of crops helps in pest control management

Reason: (R): Rotation of crops improve soil fertility




Answer & Solution
Answer:

Both A and R are correct but R does not explain A

Solution:

  • Assertion (A): Rotation of crops helps in pest control management. This is correct because changing crops disrupts the life cycle of pests specific to a particular crop.
  • Reason (R): Rotation of crops improves soil fertility. This is also correct because growing different crops replenishes soil nutrients, especially if nitrogen-fixing crops are included.

However, the reason (R) does not explain the assertion (A) because improved soil fertility is unrelated to pest control.

33. Arrange the following ports of eastern coast of India from south to north.
1. Tuticorin
2. Kakinada
3. Ennore
4. Paradip




Answer & Solution
Answer:

1-3-2-4

Solution:

Arranging the ports along the eastern coast of India from south to north:

  1. Tuticorin: Located in Tamil Nadu, it is the southernmost port in this list.
  2. Ennore: Situated near Chennai, Tamil Nadu, it is north of Tuticorin.
  3. Kakinada: Found in Andhra Pradesh, it is further north of Ennore.
  4. Paradip: Located in Odisha, it is the northernmost port in this list.

34. Assertion (A) Stubble burning in agricultural farms creates air pollution and degrades air quality.

Reason (R) Crop residue or stubble can be used to make ethanol which can be used as substitute of petrol.





Answer & Solution
Answer:

A and R are correct but R does not explains A

Solution:

  • Assertion (A): Stubble burning creates air pollution and degrades air quality. This is correct as burning stubble releases particulate matter, CO2, and other pollutants into the air.
  • Reason (R): Crop residue can be used to produce ethanol, which serves as a substitute for petrol. This is also correct as crop residue can be converted into biofuel like ethanol through processes like fermentation.

However, R does not explain A, as the production of ethanol from crop residue does not directly address the issue of stubble burning causing air pollution. Instead, it is a potential alternative use for crop residue.

35. Which of the following statements is correct?




Answer & Solution
Answer:

Temperature of 50⁰ C is equal to 122⁰ F

Solution:

To convert °C to °F: 

\(F = ({9 \over 5} \times C) + 32\)

\(F = ({9 \over 5} \times 50) + 32\)

\(F = 90 + 32 = 122\)