Which of the following is an endothermic reaction ?

Related Mcqs:

1. Pick out the endothermic reaction out of the following ?

   A. C+ ½O2 = CO
   B. CO + 3H2 = CH4 + H2O
   C. CaCO3 = CaO + CO2
   D. CO + ½O2 = CO2

2. Exothermic condensation reaction of monochlorobenzene with chloral in presence of 20% oleum as catalyst produces DDT. The reaction temperature is maintained at _____________ °C ?

   A. 15-30
   B. 90-100
   C. 250-300
   D. < 0

3. Reaction of an alcohol with organic acid is called the ________________ reaction?

   A. Saponification
   B. Esterification
   C. Neutralisation
   D. Acidification

4. The gasification reaction represented by, C + H2O = CO + H2, is a/an _________________ reaction?

   A. Exothermic
   B. Endothermic
   C. Catalytic
   D. Autocatalytic

5. Chlorine gas is produced by the electrolysis of brine (NaCl solution with solid NaCl make up) in mercury electrolytic cell. Which of the following is the anodic reaction ?

   A. Oxidation of Na+ ions
   B. Oxidation of Cl- ions
   C. Reduction of Na+ ions
   D. Reduction of Cl- ions

6. Pick out the exothermic reaction out of the following ?

   A. C + H2O = CO + H2
   B. CaC2 + H2O = Ca(OH)2 + C2H2
   C. MgCO3 = MgO + CO2
   D. All (A), B. and (C)

7. Reaction of calcium carbide with water produces a gas, which is used_________________?

   A. As an illuminant
   B. For metal cutting/welding
   C. Both A. & B.
   D. Neither A. nor B.

8. The combustion reaction, C + O2 = CO2, is__________________?

   A. Exothermic
   B. Endothermic
   C. Autocatalytic
   D. None of these

9. Exothermic neutralisation reaction between caustic soda and dodecylbenzene sulfonic acid produces sodium dodecylbenzene sulphate, which is a/an?

   A. Explosive
   B. Soap
   C. Detergent
   D. Analgesic drug

10. Commercial scale production of hydrogen from iron-steam reaction represented by, 3Fe + 3H2O = Fe3O4 + 4H2, is not practised, as it is __________________?

    A. A slow reaction
    B. A discontinuous reaction (requiring regeneration of iron by water gas intermittently)
    C. Still in development stage (by employing fluidised bed technique)
    D. All A , B. and C