On a humid day in summer, the mole fraction of gaseous H2O (water vapour ) in the air at 25° C can be as high as 0.0287. Assuming the total pressure of 0.977 atm, what is the partial pressure of dry air ?
Which substance serves as a reducing agent in the following reaction, {tex}14H^{+} + Cr_2O^{2-}_7 + 3Ni \rightarrow 2Cr^{3+} + 7H_2O + 3Ni^{2+}{/tex}
The least stable free radical is
{tex} CH_{3}CH_{2}{/tex}
{tex}CH_{3}CH_{2}CH_{2}{/tex}
{tex} (CH_{3})_{2}CH{/tex}
{tex} CH_{3}{/tex}
The correct IUPAC name of the acid
Select the wrong statement:
At a certain temperature, the dissociation constants of formic acid and acetic acid are 1.8 x 10-4 and 1.8 x 10-5 respectively. The concentration of acetic acid solution in which the hydrogen ion has the same concentration as in 0.001 M formic acid solution is equal to
If (2, 3, 5) is one end of a diameter of the sphere x2 + y2 + z2 - 6x - 12y - 2z + 20 = 0, then the coordinates of the other end of the diameter are
A spring of force constant k is cut into two pieces such that one piece is double the length of the other. The force constant of the longer piece will be
Oxidation states of P in {tex}H_4 P_2 O_5, H_4 P_2 O_6, H_4 P_2 O_7{/tex} are respectively.
∫e3 log x (x4+1)-1 dx is equal to
Do you want to submit the exam now ?
Your Time is Expired.