MCQ
Which one of the following properties of an element is not variable?
  • A
    Valency
  • Atomic weight
  • C
    Equivalent weight
  • D
    All of these

Answer

Correct option: B.
Atomic weight
Atomic weight is specific for a particular element and does not change under any circumstances.

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

Similar questions

The correct statement$(s)$ for orthoboric acid is/are

$(A)$ It behaves as a weak acid in water due to self ionization.

$(B)$ Acidity of its aqueous solution increases upon addition of ethylene glycol.

$(C)$ It has a three dimensional structure due to hydrogen bonding.

$(D)$ It is weak electrolyte in water.

The correct order of decreasing basic strengths of $x, y$ and $z$ is
The $IUPAC$ name of is
The correct statements among the following, for a "chromatography" purification method is:
Which of the following has no dipole moment
Consider the reaction $A \rightleftharpoons B$ at $1000 K$. At time $t ^{\prime}$, the temperature of the system was increased to $2000 K$ and the system was allowed to reach equilibrium. Throughout this experiment the partial pressure of $A$ was maintained at $1$ bar. Given below is the plot of the partial pressure of B with time. What is the ratio of the standard Gibbs energy of the reaction at $1000 K$ to that at $2000 K$ ?
In Greece and Italy, marble statues were damaged by :
Consider the following equation:

$2 SO _2( g )+ O _2( g ) \rightleftharpoons 2 SO _3( g ), \Delta H =-190\,kJ$

The number of factors which will increase the yield of $SO _3$ at equilibrium from the following is $.............$.

$A.$ Increasing temperature

$B.$ Increasing pressure

$C.$ Adding more $SO _2$

$D.$ Adding more $O _2$

$E.$ Addition of catalyst

For an element $, A = 34$ and $N = 19,$ What is the atomic number of the element?
The standard enthalpies of combustion of $C_6H_{6(l)}, C_{(graphite)}$ and $H_{2(g)}$ are respectively $-3270\, kJ\, mol^{-1}, -394\, kJ\, mol^{-1}$ and $-286\, kJ\, mol^{-1}$. What is the standard enthalpy of formation of $C_6H_{6(l)}$ in $kJ\, mol^{-1}$ ?