SOF NSO 2024 previous year paper practice · PYQ-pattern set

SOF NSO 2024 PYQ-pattern questions

Showing 10 of the 18 PYQ-pattern questions in this set — freshly worded in that year's pattern, not the original questions. Answers and solutions open under each question.

1. Q1 · Series Completion

   Find the missing number in the series: 3, 7, 15, 31, ?, 127

   • A. 55
   • B. 63
   • C. 61
   • D. 59
   Answer and solution

   Answer: B

   Each term follows the pattern (2×previous term + 1): 2×31 + 1 = 63.

2. Q2 · Verbal Reasoning

   If 'sky blue cloud' is coded as 'po kl mt', 'cloud rain water' is coded as 'mt rs nj', and 'water sky river' is coded as 'nj po df', then what is the code for 'blue'?

   • A. mt
   • B. kl
   • C. po
   • D. rs
   Answer and solution

   Answer: B

   From the first statement, 'sky blue cloud' = 'po kl mt'. 'sky' = 'po' and 'cloud' = 'mt' appear in other statements, so 'blue' = 'kl'.

3. Q3 · Ranking and Order

   Ritu ranks 7th from the top and 26th from the bottom in a class. How many students are there in the class?

   • A. 31
   • B. 32
   • C. 33
   • D. 34
   Answer and solution

   Answer: B

   Total students = (Rank from top + Rank from bottom − 1) = 7 + 26 − 1 = 32.

4. Q4 · Direction Sense

   Ankit walks 5 km towards North, then turns right and walks 3 km. He then turns right again and walks 5 km. In which direction is he now from his starting point?

   • A. North
   • B. South
   • C. East
   • D. West
   Answer and solution

   Answer: C

   After walking North 5 km, turning right (East) 3 km, and right again (South) 5 km, he is 3 km East of his starting point.

5. Q5 · Is Matter Around Us Pure

   A mixture contains salt, sand, and iron filings. Which of the following sequences of separation techniques would be most effective to obtain all three components separately?

   • A. Magnetic separation → Filtration → Evaporation
   • B. Filtration → Evaporation → Magnetic separation
   • C. Evaporation → Magnetic separation → Filtration
   • D. Magnetic separation → Evaporation → Filtration
   Answer and solution

   Answer: A

   First use a magnet to remove iron filings, then dissolve the mixture in water and filter to separate sand, and finally evaporate the filtrate to obtain salt crystals.

6. Q6 · Gravitation

   The weight of an object on the surface of Earth is 60 N. What will be its weight at a height equal to half the radius of Earth from its surface? (Assume radius of Earth = R)

   • A. 40 N
   • B. 26.7 N
   • C. 30 N
   • D. 20 N
   Answer and solution

   Answer: B

   At height h = R/2, distance from center = R + R/2 = 3R/2. Weight varies as 1/r². New weight = 60 × (R/(3R/2))² = 60 × (2/3)² = 60 × 4/9 = 26.7 N.

7. Q7 · Motion

   A particle is moving in a circular path of radius 7 m with a uniform speed of 14 m/s. What is the magnitude of its acceleration?

   • A. 14 m/s²
   • B. 21 m/s²
   • C. 28 m/s²
   • D. 7 m/s²
   Answer and solution

   Answer: C

   For uniform circular motion, centripetal acceleration = v²/r = (14)²/7 = 196/7 = 28 m/s², directed towards the center.

8. Q8 · The Fundamental Unit of Life

   Which of the following statements is INCORRECT about lysosomes?

   • A. They contain hydrolytic enzymes
   • B. They are known as suicidal bags of the cell
   • C. They are double membranous structures
   • D. They help digest old organelles
   Answer and solution

   Answer: C

   Lysosomes are single-membrane bound organelles, not double-membrane structures.

9. Q9 · Natural Resources

   Which of the following is a renewable natural resource?

   • A. Coal
   • B. Petroleum
   • C. Natural gas
   • D. Wind energy
   Answer and solution

   Answer: D

   Wind energy is a renewable resource as it is continuously replenished by nature, unlike fossil fuels.

10. Q10 · Diversity in Living Organisms

    Which of the following is the correct hierarchical sequence of taxonomic categories from most inclusive to least inclusive?

    • A. Kingdom → Class → Phylum → Order → Family → Genus → Species
    • B. Kingdom → Phylum → Class → Order → Family → Genus → Species
    • C. Phylum → Kingdom → Class → Family → Order → Genus → Species
    • D. Kingdom → Phylum → Order → Class → Family → Genus → Species
    Answer and solution

    Answer: B

    The correct hierarchical order from broadest to most specific is Kingdom → Phylum → Class → Order → Family → Genus → Species.