Science as a tool to understand the past, present and future
Science as a tool to understand the past, present and future MCQ Questions
7.
Who is the father of modern chemistry
ANSWER :
B. Antoine lavoisier
Approach
The question asks to identify the 'father of modern chemistry'. This is a direct factual question requiring knowledge of the history of chemistry.
Step-by-step
- Recall prominent figures in the history of chemistry and their contributions.
- Identify the individual credited with laying the foundations of modern chemistry through his experimental work and theoretical insights.
- Antoine Lavoisier is widely recognized for his pivotal role in transforming chemistry from a qualitative to a quantitative science.
- His contributions include the law of conservation of mass, explaining combustion and respiration in terms of oxygen, and reforming chemical nomenclature.
Correct Option: B) Antoine Lavoisier is widely regarded as the 'father of modern chemistry' due to his groundbreaking work on combustion, the law of conservation of mass, and his efforts in systematizing chemical nomenclature. He shifted chemistry from a qualitative to a quantitative science.
Incorrect Options
- A) Webb: There is no prominent figure named 'Webb' widely recognized as the father of modern chemistry.
- C) Alfred Marshall: Alfred Marshall was a highly influential British economist, known for his work in neoclassical economics. He has no connection to chemistry.
- D) Galileo: Galileo Galilei was an Italian astronomer, physicist, and engineer, often referred to as the 'father of observational astronomy' and the 'father of modern physics'. His work was primarily in physics and astronomy, not modern chemistry.
8.
who has vision of science
ANSWER :
A. Jawaharlal Nehru
Approach
The question asks to identify the Indian leader who is particularly associated with a "vision of science." This requires knowledge of the historical contributions and philosophies of prominent Indian figures.
Step-by-step
- Consider each option and their known contributions or ideologies.
- Jawaharlal Nehru, India's first Prime Minister, was a strong advocate for scientific temper and industrialization. He believed that science and technology were crucial for India's development and progress. He established numerous scientific institutions, including IITs and national laboratories.
- B.R. Ambedkar was a social reformer and the chief architect of the Indian Constitution, focusing on social justice and equality. While he valued education, his primary focus was not on promoting scientific research in the same way Nehru did.
- Mahatma Gandhi championed non-violence, rural development, and self-sufficiency, often emphasizing traditional methods and a critique of modern industrialization, which included some aspects of Western science and technology.
- Subhas Chandra Bose was a nationalist leader known for his military and political efforts to achieve India's independence. His vision was primarily political and strategic for liberation, rather than a specific focus on scientific development post-independence.
- Based on these historical roles, Jawaharlal Nehru's commitment to fostering a scientific outlook and establishing a scientific infrastructure for modern India stands out as a "vision of science."
Correct Option: A) Jawaharlal Nehru. He is widely recognized for his emphasis on scientific and technological development as foundational for modern India. He coined the term "scientific temper" and actively promoted scientific research and education.
Incorrect Options
- B) Ambedhkar — B.R. Ambedkar's primary focus was on social justice, eradication of untouchability, and constitutional law. While he valued education and rational thought, his vision was not predominantly centered on the promotion of science and technology in the way Nehru's was.
- C) Gandhi — Mahatma Gandhi's philosophy emphasized self-reliance, rural economy, and a critical view of industrialization and Western modernity, which included aspects of modern science. His vision was more aligned with traditional, sustainable practices rather than large-scale scientific and industrial development.
- D) Bose — Subhas Chandra Bose was a prominent nationalist leader whose main objective was India's independence through political and military means. His vision was primarily focused on national liberation and unity, not specifically on the development of science as a cornerstone of the future nation.
Approach
The question asks about the invention or conceptualization of the atom. This requires knowledge of the history of atomic theory and the key scientists involved in its development.
Step-by-step
- Recall the foundational theories regarding the atom.
- Identify the scientist credited with proposing the first modern atomic theory.
- Compare this with the contributions of the other scientists listed in the options.
John Dalton, in the early 19th century, proposed the first comprehensive atomic theory. While the concept of indivisible particles (atoms) dates back to ancient Greek philosophers like Democritus, Dalton's theory was the first scientific theory that stated matter is composed of indivisible atoms, that atoms of a given element are identical in mass and properties, and that compounds are formed by a combination of two or more different kinds of atoms. Therefore, he is often credited with 'inventing' or establishing the modern atomic theory.
Correct Option:
C) John Dalton is widely recognized for formulating the first modern atomic theory in the early 19th century. His postulates laid the groundwork for understanding the structure and behavior of matter at the atomic level.
Incorrect Options
- A) James Chadwick is known for discovering the neutron in 1932. His work was crucial in completing the understanding of the atomic nucleus, but he did not invent the concept of the atom itself.
- B) Rutherford (Ernest Rutherford) is famous for his gold foil experiment, which led to the discovery of the atomic nucleus and the proposal of the nuclear model of the atom in 1911. While his contributions were fundamental to understanding atomic structure, he did not invent the atom.
- D) J.J. Thomson discovered the electron in 1897 and proposed the "plum pudding" model of the atom. His work showed that atoms are divisible and contain subatomic particles, but he did not invent the concept of the atom.
10.
Who invented Proton ?
Approach
The question asks to identify the scientist credited with the discovery of the proton. This requires knowledge of fundamental atomic discoveries and the scientists associated with them.
Step-by-step
- Recall the major discoveries in atomic structure and the scientists involved.
- Ernest Rutherford is widely credited with the discovery of the proton in 1919. He observed that when alpha particles struck nitrogen atoms, hydrogen nuclei (protons) were emitted. He recognized these hydrogen nuclei as fundamental particles and named them protons.
- Compare this information with the given options to find the correct inventor.
Correct Option: B) Rutherford is credited with the discovery of the proton.
Incorrect Options
- A) James Chadwick — James Chadwick discovered the neutron in 1932.
- C) John Dalton — John Dalton proposed the atomic theory in the early 19th century, but he did not discover subatomic particles like the proton.
- D) J.J. Thomson — J.J. Thomson discovered the electron in 1897.
11.
Who invented Electron ?
Approach
The question asks to identify the scientist credited with the discovery of the electron. This requires knowledge of fundamental atomic discoveries and the scientists associated with them.
Step-by-step
- Recall the history of atomic structure and the discovery of subatomic particles.
- Identify the scientist who performed experiments with cathode rays, leading to the identification of the electron.
- Match this scientist with the given options.
Correct Option:
D) J.J. Thompson
J.J. Thomson (Joseph John Thomson) is widely credited with the discovery of the electron in 1897. He conducted experiments using cathode ray tubes, demonstrating that cathode rays were composed of previously unknown negatively charged particles, which he called "corpuscles." These "corpuscles" were later named electrons.
Incorrect Options
- A) James Chadwick — James Chadwick is known for his discovery of the neutron in 1932. The neutron is another subatomic particle found in the nucleus of an atom, but it was discovered much later than the electron.
- B) Rutherford — Ernest Rutherford is famous for his gold foil experiment (Rutherford's scattering experiment) in 1911, which led to the discovery of the atomic nucleus and the proposal of the nuclear model of the atom. He also discovered the proton in 1919.
- C) John Dalton — John Dalton proposed the first modern atomic theory in the early 19th century (around 1803-1808). His theory stated that matter is composed of indivisible atoms, but he did not discover any subatomic particles like the electron.
12.
Who invented Neutron ?
ANSWER :
A. James Chadwick
Approach
The question asks to identify the scientist credited with the discovery of the neutron. This is a direct factual recall question from the history of atomic structure and particle physics.
Step-by-step
- Recall the major discoveries in atomic structure and the scientists associated with them.
- The neutron is a subatomic particle with no net electric charge and a mass slightly greater than that of a proton.
- Its existence was proposed earlier, but it was experimentally discovered in 1932.
- James Chadwick performed experiments involving bombarding beryllium with alpha particles, observing highly penetrating, uncharged radiation that could eject protons from paraffin. He correctly interpreted this radiation as consisting of neutral particles, which he named neutrons.
Correct Option:
A) James Chadwick is correctly identified as the inventor (discoverer) of the neutron in 1932.
Incorrect Options
- B) Rutherford: Ernest Rutherford is famous for his gold foil experiment which led to the discovery of the atomic nucleus and the proton. He also proposed the existence of a neutral particle, but did not experimentally discover it.
- C) John Dalton: John Dalton proposed the atomic theory in the early 19th century, which stated that matter is composed of indivisible atoms. He did not discover any subatomic particles.
- D) J.J Thompson: J.J. Thomson discovered the electron in 1897 using cathode ray tubes, leading to his "plum pudding" model of the atom.
