SOF NSO · Previous year papers · 2022
SOF NSO 2022 previous year paper practice · PYQ-pattern set
17 PYQ-pattern questions modelled on the 2022 paper (which had 50) · 60 min
Every question here is freshly worded in the pattern of the 2022 paper — same topics, style and difficulty — not the original questions, which Shishya does not reproduce.
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Showing 10 of the 17 PYQ-pattern questions in this set — freshly worded in that year's pattern, not the original questions. Answers and solutions open under each question.
Q1 · Ranking and Order
In a row of 40 students, Ravi is 12th from the left end. What is his position from the right end?
- A. 28th
- B. 29th
- C. 30th
- D. 27th
Answer and solution
Answer: B
Position from right = (Total students - Position from left + 1) = 40 - 12 + 1 = 29.
Q2 · Series Completion
Complete the series: Z, X, V, T, R, ?
- A. O
- B. P
- C. Q
- D. N
Answer and solution
Answer: B
Each letter moves 2 steps backward in the alphabet: Z−2=X, X−2=V, ..., R−2=P.
Q3 · Mathematical Operations
If 8 * 3 = 24, 6 * 4 = 24, and 9 * 2 = 18, then what is 7 * 5?
- A. 30
- B. 35
- C. 40
- D. 45
Answer and solution
Answer: B
The operation * represents normal multiplication: 7 × 5 = 35.
Q4 · Blood Relations
If A is the brother of B, B is the sister of C, and C is the father of D, how is A related to D?
- A. Father
- B. Uncle
- C. Brother
- D. Grandfather
Answer and solution
Answer: B
A is the brother of B, and B is the sister of C (so A is C's brother). C is D's father, making A the uncle of D.
Q5 · Paper Folding and Cutting
A rectangular paper is folded once along its width and a circular hole is punched. How many holes appear when unfolded?
- A. 1
- B. 2
- C. 3
- D. 4
Answer and solution
Answer: B
One fold creates 2 layers. Punching one hole through both layers creates 2 holes when the paper is unfolded.
Q6 · Structure of the Atom
An element X has mass number 35 and contains 18 neutrons in its nucleus. What is the electronic configuration of element X?
- A. 2, 8, 7
- B. 2, 8, 5
- C. 2, 8, 8, 1
- D. 2, 8, 6
Answer and solution
Answer: A
Atomic number = Mass number - Neutrons = 35 - 18 = 17. An atom with 17 electrons has the configuration 2, 8, 7 (Chlorine).
Q7 · Matter in Our Surroundings
Which of the following correctly explains why the smell of hot sizzling food reaches us several meters away?
- A. Particles of matter have space between them and are in constant random motion which increases with temperature
- B. Particles of matter have zero kinetic energy at room temperature
- C. Intermolecular forces increase with increase in temperature
- D. Particles of solid food convert directly into gas
Answer and solution
Answer: A
At higher temperatures, particles of aromatic compounds gain more kinetic energy and move faster through air (diffusion), allowing the smell to spread quickly over larger distances.
Q8 · Work and Energy
A body of mass 2 kg is thrown vertically upward with a velocity of 20 m/s. What will be its kinetic energy at the highest point of its trajectory? (Take g = 10 m/s²)
- A. 400 J
- B. 200 J
- C. 100 J
- D. 0 J
Answer and solution
Answer: D
At the highest point, the velocity becomes zero momentarily. Therefore, kinetic energy = ½mv² = ½ × 2 × 0² = 0 J.
Q9 · Sound
Two sound waves of frequencies 400 Hz and 404 Hz are sounded together. How many beats will be heard per second?
- A. 2 beats/s
- B. 4 beats/s
- C. 8 beats/s
- D. 10 beats/s
Answer and solution
Answer: B
Number of beats per second = difference in frequencies = 404 - 400 = 4 beats/s.
Q10 · Chemical Reactions and Equations (Class 10)
When 5.0 g of calcium carbonate (CaCO₃) is heated, it decomposes completely into calcium oxide and carbon dioxide. If the molar mass of CaCO₃ is 100 g/mol, what volume of CO₂ is produced at STP? (Molar volume at STP = 22.4 L)
- A. 0.56 L
- B. 1.12 L
- C. 2.24 L
- D. 11.2 L
Answer and solution
Answer: B
Moles of CaCO₃ = 5/100 = 0.05 mol. Since 1 mol CaCO₃ produces 1 mol CO₂, volume = 0.05 × 22.4 = 1.12 L.
Breakdown by subject
Logical Reasoning
6 questions
Science
9 questions
Achievers Section
2 questions