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Choose the correct options and explain the reason for the correct and incorrect options in the context of Ernest Rutherford’s gold foil experiment: (i) The experiment clearly showed the existence of neutrons in the nucleus. (ii) The results disproved the plum pudding model and led to the idea of a nucleus at the centre of the atom. (iii) The large deflection of a few alpha particles indicated that most of the mass of the atom and positive charge are packed into a tiny centre. (iv) The way alpha particles were deflected showed that electrons move around the nucleus.
Statements (ii) and (iii) are correct because alpha particle deflections proved positive charge and atomic mass are concentrated in a tiny central nucleus, replacing Thomson's plum pudding model. Statement (i) is incorrect because James Chadwick discovered neutrons much later in 1932. Statement (iv)Read more
Statements (ii) and (iii) are correct because alpha particle deflections proved positive charge and atomic mass are concentrated in a tiny central nucleus, replacing Thomson’s plum pudding model. Statement (i) is incorrect because James Chadwick discovered neutrons much later in 1932. Statement (iv) is incorrect because alpha deflections were caused by nuclear electrostatic repulsion, not by the motion of revolving electrons.
For more NCERT Solutions of Class 9 Science Exploration Chapter 8 Journey Inside the Atom Question Answer (2026-27)
https://www.tiwariacademy.com/ncert-solutions/class-9/science/exploration-chapter-8/
See lessHow does the poet’s tone change from the beginning to the end of the poem?
Initially, the tone is filled with energetic anticipation and fierce competitive excitement as athletes prepare for the sprint. When the youngest runner falls, the tone turns somber and sympathetic, reflecting anguish and shattered dreams. However, once the other eight runners return to help him, thRead more
Initially, the tone is filled with energetic anticipation and fierce competitive excitement as athletes prepare for the sprint. When the youngest runner falls, the tone turns somber and sympathetic, reflecting anguish and shattered dreams. However, once the other eight runners return to help him, the tone transforms into profound warmth, admiration and joyful celebration of human kindness, concluding on an uplifting note.
For more NCERT Solutions of Class 9 English Kaveri Chapter 5 Nine Gold Medals Question Answer (2026-27)
https://www.tiwariacademy.com/ncert-solutions/class-9/english/kaveri-chapter-5/
See lessHow does the use of imagery make the poem more appealing?
The poet employs sensory imagery to draw readers directly into the atmosphere of the stadium. Visual descriptions of the runners poised at the blocks and auditory elements like the firing pistol make the tension tangible. By enabling readers to vividly see the tumble, hear the cries of distress andRead more
The poet employs sensory imagery to draw readers directly into the atmosphere of the stadium. Visual descriptions of the runners poised at the blocks and auditory elements like the firing pistol make the tension tangible. By enabling readers to vividly see the tumble, hear the cries of distress and witness nine smiling faces, imagery deepens empathy and strengthens the poem’s emotional impact.
For more NCERT Solutions of Class 9 English Kaveri Chapter 5 Nine Gold Medals Question Answer (2026-27)
https://www.tiwariacademy.com/ncert-solutions/class-9/english/kaveri-chapter-5/
See lessGive an example of auditory imagery from the poem. (i) _______
Auditory imagery recreates specific sounds to make poetic scenes come alive for the reader. The phrase "the pistol exploded" creates a sharp, auditory sensation representing the sudden crack of the starting gun. Similarly, the runner's "cry of frustration and anguish" allows the audience to clearlyRead more
Auditory imagery recreates specific sounds to make poetic scenes come alive for the reader. The phrase “the pistol exploded” creates a sharp, auditory sensation representing the sudden crack of the starting gun. Similarly, the runner’s “cry of frustration and anguish” allows the audience to clearly hear the sudden, heartbreaking scream of distress echoing across the track after the unfortunate fall.
For more NCERT Solutions of Class 9 English Kaveri Chapter 5 Nine Gold Medals Question Answer (2026-27)
https://www.tiwariacademy.com/ncert-solutions/class-9/english/kaveri-chapter-5/
See lessGive three examples of visual imagery from the poem. (i) _______ (ii) _______ (iii) _______
Visual imagery paints vivid mental pictures that heighten reader immersion. The description of nine determined runners lined up at the starting blocks evokes a clear visual of tension and readiness. The image of the boy falling onto the asphalt creates an immediate visual shock of disaster, while thRead more
Visual imagery paints vivid mental pictures that heighten reader immersion. The description of nine determined runners lined up at the starting blocks evokes a clear visual of tension and readiness. The image of the boy falling onto the asphalt creates an immediate visual shock of disaster, while the sight of nine smiling runners crossing the line hand-in-hand paints a memorable picture of triumphant unity.
For more NCERT Solutions of Class 9 English Kaveri Chapter 5 Nine Gold Medals Question Answer (2026-27)
https://www.tiwariacademy.com/ncert-solutions/class-9/english/kaveri-chapter-5/
See less