A. DDT is manufactured by the condensation of chlorobenzene with chloral at 30°C in presence
of oleum, which is a highly exothermic reaction
B. Chloral is obtained by the chlorination of ethyl alcohol
C. Insecticides acting on the insects through the respiratory system are called fumigants
D. Benzene hexachloride is not a contact insecticide
Related Mcqs:
- Pick out the wrong statement ?
A. Wine, rum & Vodka are prepared by the formulation of fruit juice, sugar beet & rye
respectively
B. Protein catalysts are called enzymes
C. The rate of chemical reaction is independent of the concentration of reactants at high
concentration of enzymes
D. Total sugar content in molasses is about 10% - Pick out the wrong statement ?
A. Low intensity explosives are also called propellants, whereas high intensity explosive are
called detonators
B. Gun powder comprises of 75% salt petre, 15% charcoal and 10% sulphur
C. Lead azide is a popular military explosive
D. TNT is a hygroscopic explosive having very high melting point and is non-toxic to human
being - Pick out the wrong statement?
A. Dry process is used for the manufacture of cement, when the raw material is blast furnace slag
B. Portland cement is made employing wet process
C. Gypsum is added to Portland cement to lengthen its setting time
D. None of these - Pick out the wrong statement pertaining to the soap manufacture?
A. Transparent soaps are made by cold process
B. Organic pigments are used as colouring materials in the soap manufacture
C. Both laundry as well as toilet soaps are manufactured by hot process
D. Colourless rosin is used in the manufacture of laundry soaps - Pick out the wrong statement ?
A. Kraft method of pulp manufacture can process all types of fibrous raw materials
B. Digestion time for bagasse is less than that for wood base materials
C. Both temperature and pressure in the digestor is less in case of the sulphite method as
compared to that in the sulphate method
D. None of these - Pick out the wrong statement ?
A. Catalytic hydrogenation of carbon monoxide produces methyl alcohol
B. In nylon-6, the number 6 represents the total number of carbon atoms in the ring
C. Raw materials for DDT manufacture are benzene and chlorine
D. Ethanolamines are produced by using ammonia and ethylene oxide as raw material - Pick out the wrong statement pertaining to the properties of glasses. Glasses generally have___________________?
A. High electrical insulation properties
B. Sharp melting points
C. Low co-efficient of thermal expansion
D. Compressive strength much greater than their tensile strengths - Pick out the wrong statement?
A. Conversion of SO2 to SO3 in Monsanto-4 pass converter is about 98%
B. The chemical formula of oleum is H2S2O7, which is formed by saturating sulphuric acid with
sulphur trioxide
C. Vitriol oil is nothing but technical sulphuric acid
D. Decomposition of sulphuric acid on heating does not start before its boiling - Pick out the wrong statement pertaining to nitric acid ?
A. About 90% of nitric acid is manufactured by Ostwald’s process
B. It is a strong mono basic acid which reacts with almost all the metals except noble metals
C. Yellow color of impure nitric acid is because of dissolved oxides of nitrogen (mainly NO2)
D. Arc process of nitric acid manufacture is economical as compared to Ostwald’s process - Pick out the wrong statement ?
A. High early strength cement are made from materials having high silica to lime ratio
B. The function of gypsum in cement is to enhance its initial setting rate
C. Acid resistant cements are known as silicate cement
D. Major component of greyish Portland cement is tricalcium silicate
