MCQ
How does the surface tension of a liquid vary with increase in temperature?
  • A
    Remains same.
  • surface
  • C
    Increases.
  • D
    decreases.

Answer

Correct option: B.
surface
Surface tension of a liquid decreases with increase in temperature due to less forces of attraction between the molecules.

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

he electrons revolve around the nucleus only in certain fixed paths called :
An exothermic reaction is one in which the reacting substances
In a cyclic process, the change in the internal energy of a system over one complete cycle :
The standard enthalpies of formation of  $1, 3-$ butadiene $(g),\, CO_2(g)$ and $H_2O(g)$ at $298\,K$ are $-30, -94$ and $-68\,\, kcal/ mol,$ respectively. If the magnitude of resonance enthalpies of $1,3-$ butadiene and $CO_2$ are $10$ and $20\,\, kcal/mol,$ respectively, the enthalpy of combustion of $1, 3-$butadiene $(g)$ at $298\,K,$ is........$kcal / mol$ (enthalpy of vaporisation of $H_2O(l)$ at $298\,K = 10 \,\,kcal/mol$)
Which of the following facts given is not correct ?
$(I)$ Bond length order : $H^-_2 = H^+_2 > H_2$

$(II)\, O^+_2 ,NO,N^-_2$ have same bond order of $2 \frac{1}{2}$

$(III)$ Bond order can assume any value including zero upto four

$(IV)\, NO^-_3$ and $BO^-_3$ have same bond order for $X - O$ bond (where $X$ is central atom)

Select true or false statements :
$(a)$ Promotion of electron is essential condition prior to hybridisation
$(b)$ In $VSEPR$, two or three electron pairs of a multiple bond are treated as a single super pair
$(c)$ Bond length for $CO_2$ lies between double and triple bonds
$(d)$ $Ne_2$ does not exist
Options are
Number of lone pairs of electrons in the central atom of $SCl _{2}, O _{3}, ClF _{3}$ and $SF _{6}$, respectively, are
$STATEMENT$-$1$: In water, orthoboric acid behaves as a weak monobasic acid. because

$STATEMENT$-$2$: In water, orthoboric acid acts as a proton donor.

A protein $'A'$ contains $0.30\, \%$ of glycine (molecular weight $75).$ The minimum molar mass of the protein $'A'$ is $.......\,\times 10^{3} \,g\, mol ^{-1}$ [nearest integer]
The solubility of $AgI$ in $NaI$ solution is less than that in pure water because