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Isotope of an element contains 19.23% more neutrons as compared to protons. The correct element along with its mass number is: (Given Atomic number Fe: 26, Co: 27)
Enzymes that utilize ATP in phosphate transfer require an alkaline earth metal (M) as the cofactor. M is:
Which of the following is a basic amino acid?
When electromagnetic radiation of wavelength $300 \text{ nm}$ falls on the surface of a metal, electrons are emitted with the kinetic energy of $1.68 \times 10^5 \text{ J mol}^{-1}$. The minimum energy needed to remove one mole of electron from the metal is: (Given: $h = 6.626 \times 10^{-34} \text{ J s}$, $c = 3 \times 10^8 \text{ m s}^{-1}$, $N_A = 6.022 \times 10^{23} \text{ mol}^{-1}$)
The radius of a hydrogen shell is 0.53 Å. In its first excited state, radius of the shell will be:
Which one is the wrong statement?
The magnetic moment of 2.84 BM can be shown by: (At. no. Ni = 28, Ti = 22, Cr = 24, Co = 27)
Which one of the elements with the following outer orbital configurations may exhibit the largest number of oxidation states?
Maximum number of electrons in a subshell of an atom can be determined by which of the following formula:
If uncertainty in position and momentum are both equal, what will the uncertainty in velocity be?
Given the following data: Mass of electron: 9.11 × 10⁻³¹ kg Planck's constant: 6.626 × 10⁻³⁴ Js In light of the data given above, the uncertainty involved in the measurement of velocity within a distance of 0.1 Å will be:
The number of d-electrons in Fe²⁺ (atomic number Z = 26) is not equal to the number of:
Weight (g) of two moles of the organic compound, which is obtained by heating sodium ethanoate with sodium hydroxide in the presence of calcium oxide is:
The incorrect statement among the following is:
The value of Planck's constant is 6.63 × 10⁻³⁴ Js. The speed of light is 3 × 10¹⁷ nm s⁻¹. Which value is closest to the wavelength in nanometers of a quantum of light with a frequency of 6 × 10¹⁵ s⁻¹?
The compound that is most difficult to protonate is :
What is the product formed in the below reaction? (Note: Reactant structure is missing) + $NaNO_2 + HCl \longrightarrow$ Product
If n = 6, the correct sequence for the filling of electrons will be:
In which of the following molecule, the internuclear distance will be maximum:
Given below are two statements: Statement I: The energy of the He⁺ ion in n=2 state is same as the energy of H atom in n=1 state. Statement II: It is possible to determine simultaneously the exact position and exact momentum of an electron in H atom. In light of the above statements, choose the correct answer from the options given below: