MCQ
The present atomic weight scale is based on
- ✓${C^{12}}$
- B${O^{16}}$
- C${H^1}$
- D${C^{13}}$
✓
Answer
Correct option: A.
${C^{12}}$
a
The atomic mass refers to the actual physical mass of an atom.
The atomic mass refers to the actual physical mass of an atom.
The atomic mass is very small in the numerical values that's why it is calculated on the basis of comparison with the mass of carbon-$12$ isotope.
Need a full question paper?
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
Explore more
Similar questions
In Which of the following process nitrogen undergoes in oxidation process
The structure of ${\left[ {Cu\,{{\left( {{H_2}O} \right)}_4}} \right]^{ + + }}$ ion is
→What is the major product expected from the following reaction ?
→Where $D$ is an isotope of hydrogen
Calculate the partial pressure of carbon monoxide from the following data
→$CaC{O_3}\left( s \right)\overset \Delta \longleftrightarrow CaO\left( s \right) + C{O_2} \uparrow ,{K_p} = 8 \times {10^{ - 2}}$
$C{O_2}\left( g \right) + C\left( s \right) \rightleftharpoons 2CO\left( g \right),{K_p} = 2$
Which of the following has $p\pi - d\pi $ bonding
→Which has wrong $IUPAC$ name ?
→$64 \,gm$ of an organic compound contains $24\, gm$ of carbon, $8\,gm$ of hydrogen and the rest oxygen. The empirical formula of the compound is
→Which one of the following equations does not correctly represent the first law of thermodynamics for the given processes involving an ideal gas? (Assume non -expansion work is zero)
The $IUPAC$ name of (figure) is
→Match the species given in Column $I$ with the shape given in column $II$ and mark the correct option:-
→| Column-$I$ | Column-$II$ (Shape) |
| $(A) \,SF_4$ | $(1)$ Tetrahedral |
| $(B)\, BrF_3$ | $(2)$ Pyramidal |
| $(C)\, BrO_3^-$ | $(3)$ Sea-Saw shaped |
| $(D)\, NH_4^+$ | $(4)$ Bent $T-$ shaped |