Question 1 of 50
Which figure does not belong with the other three?
🔬 Science · Class 7 · 2026-27
SOF ISO Class 7 free mock test and sample paper
A full ISO Class 7 practice paper: 50 questions for 60 marks in 60 minutes, in the same 3 sections and order as the SOF paper. Take it here with an instant score — no login, no sign-up — or print it with an OMR sheet and the answer key. Free, with no ads.
- Questions50
- Marks60
- Time60 min
- Sections3
The paper
Tap an answer for each question. The 60-minute clock starts at your first answer; press Finish and mark at the bottom when you are done, and every answer is explained.
Section 1 — Logical Reasoning · 10 × 1 mark
- Question 2 of 50
Which option is the mirror image of the given figure when the mirror is held on its right?
- Question 3 of 50
On a standard dice the numbers on opposite faces add up to 7. A dice rests with 4 on top and 5 facing you. What is the total of the numbers on the bottom face and the back face?
- Question 4 of 50
Which of the following diagrams best represents the relationship among Flowers, Vehicles, Cars?
- Question 5 of 50
In a class of 36 students, Ira is 18th from the top. What is Ira's position from the bottom?
- Question 6 of 50
If '−' means '+', '×' means '−', '÷' means '×', '+' means '÷', then what is the value of 11 ÷ 9 − 6?
- Question 7 of 50
There is a certain relationship between the first pair of figures. Complete the second pair in the same way.
?A : B :: C : ? - Question 8 of 50
In a certain code language, GARDEN is written as MGXJKT. How will WINTER be written in the same code?
- Question 9 of 50
Which figure comes next in the series?
- Question 10 of 50
What is the angle between the hour hand and the minute hand of a clock at 2:30?
Section 2 — Science · 35 × 1 mark
- Question 11 of 50
Which of these is a metal?
- Question 12 of 50
How does a pinhole camera work?
- Question 13 of 50
Four toy cars are timed along a track. The distance each has gone from the start is noted every second, at 0, 1, 2, 3 and 4 s. Which car is in non-uniform motion?
- Question 14 of 50
Which of these is correct about magnets?
- Question 15 of 50
Where in the body is bile made?
- Question 16 of 50
Water is poured on burning wood. What is the main way it puts out the fire?
- Question 17 of 50
During the starch test, why is the leaf boiled in alcohol before iodine is put on it?
- Question 18 of 50
Which of these is correct about a laboratory thermometer?
- Question 19 of 50
What is a growth spurt?
- Question 20 of 50
What is done about acidic waste water from a factory?
- Question 21 of 50
How does a sand clock keep time?
- Question 22 of 50
A simple pendulum takes 48 s to complete 12 oscillations. What is its time period?
- Question 23 of 50
The pinhole of a pinhole camera is made much bigger. What happens to the image?
- Question 24 of 50
A pitcher plant has which mode of nutrition?
- Question 25 of 50
Which part of the body has the job of carrying urine from the kidneys down to the bladder?
- Question 26 of 50
Assertion (A): Iron gates are painted from time to time.
Reason (R): Paint keeps air and moisture away from the iron, so it does not rust.
Select the correct option.
- Question 27 of 50
Which of these words looks exactly the same when it is seen in a plane mirror held upright beside it?
- Question 28 of 50
Which of these tells you that a chemical change has taken place?
- Question 29 of 50
Which of these is a non-luminous object?
- Question 30 of 50
Assertion (A): The handle of a steel pan is covered with plastic.
Reason (R): Plastic is a poor conductor of heat.
Select the correct option.
- Question 31 of 50
What kind of motion does the bob of a swinging pendulum have?
- Question 32 of 50
What is the work of the gall bladder in digestion?
- Question 33 of 50
Which of these about adolescence is a fact, not a myth?
- Question 34 of 50
A few drops of iodine solution are put on a slice of potato and it turns blue-black. Which nutrient does the potato contain?
- Question 35 of 50
A car travels at 80 km/h for 4 hours. How far does it go?
- Question 36 of 50
4 identical bulbs are joined to a cell and a closed switch, each bulb in its own side-by-side branch. All of them are glowing. Then two bulbs fuse. How many bulbs go on glowing?
- Question 37 of 50
Which hormone gets the body ready to act in danger?
- Question 38 of 50
Which of these is true of a convex mirror?
- Question 39 of 50
Which of these is a good insulator of heat?
- Question 40 of 50
Which of the following is correct about exhalation?
- Question 41 of 50
Which of these is transparent?
- Question 42 of 50
Which of these changes takes place in boys at puberty?
- Question 43 of 50
How does a starfish take in its food?
- Question 44 of 50
In which of these does heat travel mainly by conduction?
- Question 45 of 50
Which of these is true of the revolution of the Earth?
Section 3 — Achievers Section · 5 × 3 marks
- Question 46 of 50
How many squares of any size are there in the given figure?
- Question 47 of 50
Three switches S₁, S₂ and S₃ are put into a circuit. S₁ and S₂ are wired side by side, in two branches next to each other, and that pair is joined in a line with S₃, a cell and a lamp.
| Switch | What it does |
| --- | --- |
| Closed | joins the circuit up at that point |
| Open | leaves a gap at that point |
In which of these will the lamp glow?
- Question 48 of 50
Study the statements given below and select the incorrect ones.
(i) The filament of a bulb is made of tungsten.
(ii) The metal cap of a cell is its positive terminal.
(iii) A switch supplies the push that drives the current round a circuit.
(iv) A compass needle turns aside when it is held near a wire carrying a current.
(v) A fuse melts and breaks the circuit when too much current flows.
- Question 49 of 50
A cyclist rides 120 km at 30 km/h and then another 120 km at 20 km/h. What is the average speed for the whole journey?
- Question 50 of 50
A boy stands 120 cm in front of a plane mirror. How far is he from his image?
Answer key and explanations (opens below)
1. (A) 2. (A) 3. (D) 4. (A) 5. (A) 6. (A) 7. (D) 8. (D) 9. (C) 10. (C) 11. (B) 12. (D) 13. (A) 14. (B) 15. (A) 16. (D) 17. (C) 18. (A) 19. (C) 20. (C) 21. (C) 22. (D) 23. (D) 24. (B) 25. (D) 26. (A) 27. (B) 28. (D) 29. (C) 30. (B) 31. (A) 32. (A) 33. (A) 34. (C) 35. (A) 36. (D) 37. (D) 38. (D) 39. (B) 40. (C) 41. (A) 42. (D) 43. (A) 44. (B) 45. (C) 46. (C) 47. (B) 48. (C) 49. (B) 50. (D)
- 1. (A)
Three of them have 4 sides; the odd one out has 3.
- 2. (A)
A mirror held at the side swaps left and right but keeps top and bottom the same way up.
- 3. (D)
The bottom face is 7 − 4 = 3 and the back face is 7 − 5 = 2, so together they make 5.
- 4. (A)
Every car is a vehicle, so that circle is inside; flowers belong to neither group.
- 5. (A)
Position from the bottom = total − position from the top + 1 = 36 − 18 + 1 = 19. Forgetting the +1 is the usual slip.
- 6. (A)
Swap the symbols back first: the sum is 11 × 9 + 6. Then 11 × 9 = 99, and 99 + 6 = 105.
- 7. (D)
The second figure is the first turned through 180°, so the answer is the third figure turned the same way.
- 8. (D)
Every letter moves 6 places forward in the alphabet, so WINTER becomes COTZKX.
- 9. (C)
The series repeats every 2 figures, so after the trapezium the next one is a hexagon.
- 10. (C)
The minute hand moves 6° a minute and the hour hand 0.5°, so at 2:30 they are 105° apart. The hour hand does not sit still on the 2 — it has already crept 15° past it.
- 11. (B)
Mercury (Hg) is a metal; the other three are non-metals.
- 12. (D)
In a pinhole camera, light through a tiny hole makes an upside-down image on a screen.
- 13. (A)
Work out the distance covered in each second. The other three cars cover the same distance every second; this one does not, so its motion is non-uniform.
- 14. (B)
Only one of the four is true: A magnet loses its magnetism if it is dropped or heated often.
- 15. (A)
Bile is made in the liver, and it acts on fat.
- 16. (D)
Water takes away heat, and below its ignition temperature the wood stops burning.
- 17. (C)
Alcohol takes the green colour out of the leaf; on a pale leaf the blue-black of iodine shows clearly.
- 18. (A)
Of a laboratory thermometer it is true that: it is used to measure the temperature of a liquid in a beaker. The other three belong to the clinical thermometer.
- 19. (C)
A growth spurt is the sudden jump in height at the start of adolescence.
- 20. (C)
Adding a base before letting it out works because the neutral water no longer harms the fish in the river.
- 21. (C)
In a sand clock, sand runs from the upper bulb into the lower one.
- 22. (D)
The time period is the time for one oscillation: 48 ÷ 12 = 4 s.
- 23. (D)
A big hole lets in rays from each point over a wider patch, so the many overlapping images blur together, though more light gets in.
- 24. (B)
A pitcher plant is insectivorous — it traps and digests insects for nitrogen.
- 25. (D)
The job of the ureters is carrying urine from the kidneys down to the bladder.
- 26. (A)
Both sentences are true, and the second is exactly why the first is true.
- 27. (B)
A plane mirror swaps left and right. AHA reads the same backwards, and each of its letters (A, H) looks the same when flipped, so its image is unchanged.
- 28. (D)
In a chemical change, a gas bubbles out of the mixture.
- 29. (C)
A planet gives out no light of its own — we see it only by the light that falls on it.
- 30. (B)
Both sentences are true, and the second is exactly why the first is true.
- 31. (A)
The bob of a swinging pendulum moves in periodic motion.
- 32. (A)
The gall bladder stores the bile until it is needed.
- 33. (A)
This one is true: The changes of puberty begin at different ages in different children. The other three are common myths.
- 34. (C)
Iodine turns blue-black only with starch, and potatoes are rich in it.
- 35. (A)
Distance = speed × time = 80 × 4 = 320 km.
- 36. (D)
Each bulb has its own branch, so a fused bulb breaks only its own path. The other 2 still get current and stay lit.
- 37. (D)
Adrenaline, from the adrenal gland, gets the body ready to act in danger.
- 38. (D)
Of a convex mirror it is true that: it spreads the rays of light that fall on it apart. The other three belong to a concave mirror.
- 39. (B)
Thermocol is an insulator — heat hardly passes through it.
- 40. (C)
During exhalation the chest cavity becomes smaller, and the other three describe breathing in.
- 41. (A)
You can see clearly through air, so it is transparent.
- 42. (D)
At puberty in boys, the voice box grows and the voice becomes deep.
- 43. (A)
A starfish pushes its stomach out through its mouth to eat the soft animal inside a shell.
- 44. (B)
Here a tawa becomes hot on the stove, and that is conduction.
- 45. (C)
Of the Earth's revolution it is true that: it is why one day has to be added to the calendar every fourth year. The other three belong to its rotation.
- 46. (C)
Count them by size: there are 12 single squares, and then the bigger ones on top of those. Altogether that comes to 20.
- 47. (B)
S₃ is in the single line, so it must be closed; S₁ and S₂ sit in two side-by-side branches, so the current only needs one of those two to be closed.
- 48. (C)
The true statements here are: "The filament of a bulb is made of tungsten." "The metal cap of a cell is its positive terminal." "A compass needle turns aside when it is held near a wire carrying a current." "A fuse melts and breaks the circuit when too much current flows."
- 49. (B)
The first part takes 4 h and the second 6 h, so the whole 240 km takes 10 h. Average speed = 240 ÷ 10 = 24 km/h — not the average of 30 and 20.
- 50. (D)
The image is as far behind the mirror as the boy is in front of it — 120 cm — so he and his image are 120 + 120 = 240 cm apart.
About this mock test
- Is this ISO Class 7 mock test really free, with no login?
- Yes. The whole paper is on this page: no account, no sign-up, no phone number and no ads. Nothing your child answers here is sent anywhere or stored.
- How is it marked?
- The same way as the SOF paper: Logical Reasoning 1 mark a question, Science 1 mark a question, Achievers Section 3 marks a question, 60 marks in all. Press Finish and mark to see the score by section and the right answer, with an explanation, under every question.
- Can I print it?
- Yes. Print paper + OMR sheet lays it out like the real paper, with a bubble sheet and the answer key on its own last page so it can be set aside. Choose Save as PDF in the print dialog to keep a copy.
- Is it the same as the real ISO paper?
- It has the real paper's shape — 50 questions, the same sections in the same order, the same marks and the same 60 minutes — and its questions come from the ISO Class 7 syllabus. The questions are Sprinto's own, not SOF's; Sprinto is not affiliated with the Science Olympiad Foundation.
Fresh questions every time
This paper stays the same so it can be printed and shared. In the app every ISO Class 7 question is new, the next one is picked to be just hard enough, and mistakes come back until they stick. Still free.