Photo-chemical reactions occur in presence of ___________________?

Related Mcqs:

1. The minimum energy required to allow a chemical reaction to proceed is termed as the ‘threshold energy ‘. Chemical reactions with low activation energy are ________________?

   A. Always irreversible
   B. Insensitive to temperature changes
   C. Mostly irreversible
   D. Highly temperature sensitive

2. In the hydrodealkylation of toluene to benzene, the following reactions occur: C7H8 + H2 → C6H6 + CH4 2C6H6 ⇌ C12H10 + H2 Toluene and hydrogen are fed to a reactor in a molar ratio 1:5.80% of the toluene gets converted and the selectivity of benzene(defined as moles of benzene formed/moles of toluene converted) is 90%. The fractional conversion of hydrogen is_______________________?

   A. 0.16
   B. 0.144
   C. 0.152
   D. 0.136

3. Ionic reactions occur in____________________?

   A. Solid state only
   B. Liquid state only
   C. Solutions
   D. Any state

4. With an increase in pressure in gaseous phase chemical reactions, the fractional conversion ______________ when the number of moles decreases?

   A. Increases
   B. Decreases
   C. Remain unaffected
   D. Unpredictable from the data

5. Which of the following chemical reactions will be favoured by low pressure ?

   A. 2HI ⇌ H2 + I2
   B. N2O2 ⇌ 2NO2
   C. N2 + O2 ⇌ 2NO
   D. None of these

6. For identical flow rate, feed composition and for elementary first order reactions, ‘N’ equal sized mixed reactors in series with a total volume ‘V’ gives the same conversion as a single plug flow reactor of volume ‘V’ for constant density systems. This is true, when the value of ‘N’ is ___________________?

   A. 1
   B. > 1
   C. ∞
   D. ≥ 1

7. The synthesis of proteins and metabolism in biological objects occur in the presence of biocatalyst called_________________?

   A. A ferment or an enzyme
   B. Haemoglobin
   C. Fungi
   D. None of these

8. The equilibrium constant of a catalytic chemical reaction _______________ due to the presence of?

   a catalyst.
   A. Increases
   B. Decreases
   C. Remain unaffected
   D. Unpredictable from the data

9. Chemical kinetics can predict the _______________ of a chemical reaction?

   A. Rate
   B. Feasibility
   C. Both A. & B.
   D. Neither A. nor B.

10. For the chemical reaction P → Q, it is found that the rate of reaction doubles as the concentration of ‘P’ is doubled. If the reaction rate is proportional to Cp n, then what is the value of ‘n’ for this chemical reaction ?

    A. 0
    B. 1
    C. 2
    D. 3