Download App

Structure of Atom — Chemistry STD 11 Science — Question

Rajasthan BoardEnglish MediumSTD 11 ScienceChemistryStructure of Atom1 Mark
MCQ
Define the atomic mass unit.
  • A
    Mass unit equal to exactly one-twelfth the mass of a carbon -12 atom.
  • B
    Mass unit equal to exactly the mass of a carbon -12 atom.
  • C
    Mass unit equal to exactly one-twelfth the mass of a hydrogen atom.
  • D
    All of the above.
✓

Answer

  1. Mass unit equal to exactly one-twelfth the mass of a carbon -12 atom.

Explanation:

Atomic mass unit is a mass unit equal to exactly one-twelfth the mass of a carbon-12 atom.

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Explore more

More "M.C.Q (1 Marks)" from Structure of Atom→Structure of Atom — all question types→Chemistry STD 11 Science question papers→Rajasthan Board STD 11 Science question papers→Rajasthan Board question paper generator→

Similar questions

Which among the following is the strongest Bronsted base ?
→
Which of the following is major product in the following reaction 
→
Which molecule is polar ?
→
For $d$ electrons, the azimuthal quantum number is
→
Which of the following pairs of compounds are positional isomers ?
→
Oxidation number of $C$ in ${C_6}{H_{12}}{O_6}$ is
→
Which one of the following is not correct :
→
What will be the conjugate bases for the following Bronsted acids?
$\text{HF}, \text{H}_2\text{SO}_4 \text{ and }\text{HCO}^-_3$
→
Which will not affect the degree of ionisation
→
The value of Rydberg constant $\left(R_H\right)$ is $2.18 \times 10^{-18} \mathrm{~J}$. The velocity of electron having mass $9.1 \times 10^{-31} \mathrm{~kg}$ in Bohr's first orbit of hydrogen atom $=\ldots \ldots \ldots \times 10^5 \mathrm{~ms}^{-1}$ (nearest integer)
→