Which of the following compound does not contain sulphur atom?
- Cimetidine
- Ranitidine
- Histamine
- Saccharin
The Correct Option is C
Solution and Explanation
The correct option is(C): Histamine
Histamine – does not contain sulphur.
Top Questions on Discovery of Sub-atomic Particles
- Henry Moseley studied characteristic X-ray spectra of elements. The graph which represents his observation correctly is
Given v = frequency of X-ray emitted
Z = atomic number- JEE Main - 2023
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Questions Asked in JEE Main exam
Inductance of a coil with \(10^4\) turns is \(10\,\text{mH}\) and it is connected to a DC source of \(10\,\text{V}\) with internal resistance \(10\,\Omega\). The energy density in the inductor when the current reaches \( \left(\frac{1}{e}\right) \) of its maximum value is \[ \alpha \pi \times \frac{1}{e^2}\ \text{J m}^{-3}. \] The value of \( \alpha \) is _________.
\[ (\mu_0 = 4\pi \times 10^{-7}\ \text{TmA}^{-1}) \]- JEE Main - 2026
- Ray optics and optical instruments
A small block of mass \(m\) slides down from the top of a frictionless inclined surface, while the inclined plane is moving towards left with constant acceleration \(a_0\). The angle between the inclined plane and ground is \(\theta\) and its base length is \(L\). Assuming that initially the small block is at the top of the inclined plane, the time it takes to reach the lowest point of the inclined plane is _______.
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- General Physics
- Let \(\vec{a} = -\hat{i} + 2\hat{j} + 2\hat{k}\), \(\vec{b} = 8\hat{i} + 7\hat{j} - 3\hat{k}\) and \(\vec{c}\) be a vector such that \(\vec{a} \times \vec{c} = \vec{b}\). If \(\vec{c} \cdot (\hat{i}+\hat{j}+\hat{k}) = 4\), then \(|\vec{a}+\vec{c}|^2\) is equal to:
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- Vector Algebra
- Let \( \alpha \) and \( \beta \) respectively be the maximum and the minimum values of the function \( f(\theta) = 4\left(\sin^4\left(\frac{7\pi}{2} - \theta\right) + \sin^4(11\pi + \theta)\right) - 2\left(\sin^6\left(\frac{3\pi}{2} - \theta\right) + \sin^6(9\pi - \theta)\right) \). Then \( \alpha + 2\beta \) is equal to :
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- Statistics
- The crystal field splitting energy of $[Co(oxalate)_3]^3-$ complex is 'n' times that of the $[Cr(oxalate)_3]^3-$ complex. Here 'n' is_______ (Assume $\Delta_0 > P$)}
- JEE Main - 2026
- Solutions
Concepts Used:
Discovery of Atom
According to the school textbooks, the man credited by modern science for managing extensive research work on atoms and developing atomic theory goes to an English chemist and physicist John Dalton. However, it might be surprising for many people today but some early records or shreds of evidence show that the concept of atoms was actually formulated much earlier.
The recorded history of the atom started around 450 B.C. with a Greek philosopher commonly known as Democritus. Often, he used to wonder that if a piece of the matter was cut into smaller and smaller portions then the process would get to a point where that matter could not be divided into finer or smaller pieces. He named these indivisible pieces or basic units atoms (uncuttable) which lately translated to the modern term atom.
So the basic idea that matter comprises tiny indivisible particles is actually quite old. It has been existing not only in ancient Greece cultures but in India as well. However, the only reason that these we discredit was because this ancient idea was majorly based on philosophical reasoning rather than scientific reasoning.
Scientifically, John Dalton did revive Democritus’s early ideas about the atom and he organized many experiments that provided evidence for the existence of atoms. Often, he has been referred to as the father of atoms or atomic theory.
Read More: Structure of Atom