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Class 9 Exam  >  Class 9 Tests  >  Science Olympiad Class 9  >  High Order Thinking Skills (HOTs) - 3 - Class 9 MCQ

High Order Thinking Skills (HOTs) - 3 - Class 9 MCQ


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10 Questions MCQ Test Science Olympiad Class 9 - High Order Thinking Skills (HOTs) - 3

High Order Thinking Skills (HOTs) - 3 for Class 9 2024 is part of Science Olympiad Class 9 preparation. The High Order Thinking Skills (HOTs) - 3 questions and answers have been prepared according to the Class 9 exam syllabus.The High Order Thinking Skills (HOTs) - 3 MCQs are made for Class 9 2024 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for High Order Thinking Skills (HOTs) - 3 below.
Solutions of High Order Thinking Skills (HOTs) - 3 questions in English are available as part of our Science Olympiad Class 9 for Class 9 & High Order Thinking Skills (HOTs) - 3 solutions in Hindi for Science Olympiad Class 9 course. Download more important topics, notes, lectures and mock test series for Class 9 Exam by signing up for free. Attempt High Order Thinking Skills (HOTs) - 3 | 10 questions in 15 minutes | Mock test for Class 9 preparation | Free important questions MCQ to study Science Olympiad Class 9 for Class 9 Exam | Download free PDF with solutions
High Order Thinking Skills (HOTs) - 3 - Question 1
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Read the given passage where few words are italicized and select the correct statement regarding them.
The atomic number of an element is defined as the number of protons present in the nucleus of an atom. Isotopes of an element have the same atomic number but different mass numbers. The atomic mass of an element is the weighted average mass of all the isotopes of that element.

Detailed Solution for High Order Thinking Skills (HOTs) - 3 - Question 1

Isotopes are correctly mentioned in the passage as having the same atomic number but different mass numbers.

High Order Thinking Skills (HOTs) - 3 - Question 2
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Read the given passage where few words are italicized and select the correct statement regarding them.
Acids turn blue litmus paper red and have a pH less than 7. Bases turn red litmus paper blue and have a pH greater than 7. Neutral solutions do not change the color of litmus paper and have a pH of 7.

Detailed Solution for High Order Thinking Skills (HOTs) - 3 - Question 2

Neutral solutions are correctly mentioned as having a pH of 7 and not changing the color of litmus paper.

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High Order Thinking Skills (HOTs) - 3 - Question 3
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Read the given passage where few words are italicized and select the correct statement regarding them.
Photosynthesis occurs in the chloroplasts of plant cells. It is a process by which plants convert carbon dioxide and water into glucose and oxygen using sunlight. Chlorophyll, the green pigment in plants, plays a vital role in this process.

Detailed Solution for High Order Thinking Skills (HOTs) - 3 - Question 3

Chlorophyll is correctly mentioned as the green pigment involved in photosynthesis.

High Order Thinking Skills (HOTs) - 3 - Question 4
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Read the given passage where few words are italicized and select the correct statement regarding them.
Newton's second law of motion states that the acceleration of an object is directly proportional to the net force acting on it and inversely proportional to its mass. This law can be mathematically expressed as F = ma.
Detailed Solution for High Order Thinking Skills (HOTs) - 3 - Question 4

The equation F = ma is correctly mentioned as representing Newton's second law of motion.

High Order Thinking Skills (HOTs) - 3 - Question 5
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Read the given passage where few words are italicized and select the correct statement regarding them.

The human heart is a muscular organ that pumps blood throughout the body. It consists of four chambers: two atria and two ventricles. The right side of the heart receives deoxygenated blood from the body, while the left side pumps oxygenated blood to the body.
Detailed Solution for High Order Thinking Skills (HOTs) - 3 - Question 5

The description of the heart as a muscular organ is correctly mentioned.

High Order Thinking Skills (HOTs) - 3 - Question 6
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For a particle moving along the positive x-axis from origin to x = x1, the variation of the magnitude of force on the particle is depicted in the given graphs. The force is parallel to the x-axis and is conservative. The maximum magnitude of force F1 has the same value for all the graphs.


On the basis of given graphs, which of the following statements are correct?

(i) The change in potential energy is maximum in graph II.
(ii) The change in potential energy is minimum in graph II.
(iii) The change in potential energy is greater in graph III as compared to graph I.
(iv) The change in potential energy is smaller in graph III as compared to graph I.
Detailed Solution for High Order Thinking Skills (HOTs) - 3 - Question 6

For conservative force, Change is potential energy
= – Force applied × Displacement
= –(Area under force-position curve)

Thus change in potential energy is maximum in graph III and minimum in graph II.

High Order Thinking Skills (HOTs) - 3 - Question 7
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A spherical ball of mass 0.5 kg is dropped in air and it strikes a pond as shown in the figure (a). A graph of the kinetic energy of the ball against the distance descended is shown in the figure (b).

Fill in the blanks by selecting the correct option. (Take g = 10 m/s2)
The height above the surface of the pond from where the ball has been dropped is (i) m. The average
acceleration of the ball in first part of the graph (OP) is (ii) ms–2. The average resistive force provided
by the water against the ball during the journey from P to Q is (iii) N.
Detailed Solution for High Order Thinking Skills (HOTs) - 3 - Question 7

At highest point P, Kinetic energy will transform into potential energy.


As in the OP part, spherical ball is in free fall. Hence its acceleration will be 10 ms–2.
From the graph, the average resistive force provided by water from P to Q

High Order Thinking Skills (HOTs) - 3 - Question 8
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Refer to the given figure and identify the labelled parts (V-Z).

Now, select the incorrect statement regarding V-Z.
Detailed Solution for High Order Thinking Skills (HOTs) - 3 - Question 8

In the given figure, V, X, W, Y and Z are smooth endoplasmic reticulum, rough endoplasmic reticulum, Golgi apparatus, mitochondria and lysosome respectively. Mitochondria (Y) is a double membrane bound cell organelle whereas Golgi apparatus (W) is a single membrane bound cell organelle.

High Order Thinking Skills (HOTs) - 3 - Question 9
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Refer to the given flow chart and select the incorrect statement regarding it.
Detailed Solution for High Order Thinking Skills (HOTs) - 3 - Question 9

In the given flow chart, X could be a simple permanent tissue like parenchyma, collenchyma or sclerenchyma. Y and Z are phloem and xylem respectively. The conducting elements in xylem are tracheids and vessels whereas sieve tubes are the conducting elements in phloem.

High Order Thinking Skills (HOTs) - 3 - Question 10
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The schematic atomic structures of four elements T, U, V and W are given as :

Select the incorrect statements regarding the given elements.
I. T and V combine to form T3V type compound.
II. T and W form cations while U and V form anions.
III. U and V combine to form UV3 type compound.
IV. V will gain two electrons while W will lose one electron to form a stable compound.
V. U and W combine to form U2W type compound.
Detailed Solution for High Order Thinking Skills (HOTs) - 3 - Question 10

(I) T and V will combine to form TV2 type compound as shown:

(II) T and U will form cations as they have 2 and 3 valence electrons respectively and can easily lose these electrons to form cations. On the other hand, V and W will form anions by accepting 1 and 2 electrons respectively in their outermost shell to attain a stable octet. (III) U and V combine to form UV3 type compound as shown:

(IV) V and W will form anions as they have 7 and 6 valence electrons respectively and hence can accept electrons to form anions. (V) U and W combine to form U2W3 type compound as shown:

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