Elements in a periodic table are arranged in order of their__________________?

Related Mcqs:

1. Referring to the periodic table of elements, it is found that with increasing atomic number. The atomic size in the same___________________?

   A. Period increases
   B. Period decreases
   C. Group increases
   D. Both ‘B’ & ‘C’

2. The amount of heat required to decompose a compound into its elements is _____________ the heat of formation of that compound from its elements?

   A. Less than
   B. More than
   C. Same as
   D. Not related to

3. Heat requirement for decomposition of a compound into its elements is _____________ that is evolved during the formation of that compound from its elements?

   A. The same
   B. Less than
   C. Greater than
   D. Different than

4. Which of the following identities can be most easily used to verify steam table data for superheated steam ?

   A. (∂T/∂V)S = (∂p/∂S)V
   B. (∂T/∂P)S = (∂V/∂S)P
   C. (∂P/∂T)V = (∂S/∂V)T
   D. (∂V/∂T)P = -(∂S/∂P)T

5. “The heat capacity of a solid compound is approximately equal to the sum of the heat capacities of the constituent elements.” This is the statement of___________________?

   A. Law of Petit and Dulong
   B. Kopp’s rule
   C. Nernst heat theorem
   D. Trouton’s rule

6. In an eutectic system, two elements are completely____________________?

   A. Soluble in solid state
   B. Insoluble in liquid state
   C. Insoluble in both solid & liquid state
   D. Soluble in liquid state

7. The atomic heat capacities of all solid elements ______________ with decrease in temperature?

   A. Increases
   B. Decreases
   C. Remains unchanged
   D. Approach zero at 0°C

8. The heat capacity of a solid compound is calculated from the atomic heat capacities of its constituent elements with the help of the___________________?

   A. Trouton’s rule
   B. Kopp’s rule
   C. Antoine equation
   D. Kistyakowsky equation

9. The heats of vaporisation of CS2, C2H5OH &H2O are 26.8, 38.6 & 40.6 KJ/kg.mole respectively. The order of decreasing inter-molecular forces in these liquids is________________?

   A. H2O > C2H5OH > CS2
   B. CS2 > C2H5OH > H2O
   C. H2O > CS2 > C2H5OH
   D. CS2 > H2O > C2H5OH

10. Choose the condition that must be specified in order to liquify CO2 (triple point for CO2 is – 57°C and 5.2 atm) ?

    A. Pressure must be kept below 5.2 atm
    B. Temperature must be kept above – 57°C
    C. Pressure must be kept below 5.2 atm. and temperature must be kept above 57°C
    D. Pressure and temperature must be kept below 5.2 atm. and – 57°C respectively