A. C + H2O = CO + H2
B. CaC2 + H2O = Ca(OH)2 + C2H2
C. MgCO3 = MgO + CO2
D. All (A), B. and (C)
Related Mcqs:
- 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 - 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 - 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 - Reaction of an alcohol with organic acid is called the ________________ reaction?
A. Saponification
B. Esterification
C. Neutralisation
D. Acidification - The gasification reaction represented by, C + H2O = CO + H2, is a/an _________________ reaction?
A. Exothermic
B. Endothermic
C. Catalytic
D. Autocatalytic - 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 - Which of the following is an endothermic reaction ?
A. Absorption of SO3 in 98% H2SO4
B. C + H2O = CO + H2
C. Thermal dissociation of iron pyrites
D. Both B. and C. - Pick out the wrong statement?
A. Azoic dyes are mostly applied on cotton fabrics
B. Basic dyes (e.g. amino derivatives) are applied mostly to paper
C. Mordant dyes are applied mainly to wools
D. None of these - Pick out the wrong statement ?
A. Chamber process of sulphuric acid manufacture produces pure acid of concentration < 80%
B. Contact process of sulphuric acid manufacture produces pure acid of concentration ≥ 98%
C. 75% oleum can be produced by distillation of 20% oleum
D. Contact process of sulphuric acid manufacture uses nickel as the catalyst - Pick out the wrong statement ?
A. Strongly caking coal should not be used in the Lurgi gasifier
B. Acetylene gas cannot be used for illumination purpose
C. Water gas is called blue gas because of the color of the flame, when it is burnt
D. Gaseous fuels require less percentage of excess air for combustion as compared to liquid fuels
