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Right choice is (d) Regeneration of per iodic acid to iodic acid is HIGH COST process

Explanation: Dextrin being carbohydrate gum is used in adhesives and GUMS. Starch phosphate is water SOLUBLE and has good thickening power. Dialdehyde starch is FORMED by oxidation of starch with per iodic acid. Regeneration of per iodic acid is a low cost process which is key to the oxidation reaction.

The correct choice is (d) 78

The BEST explanation: The chemical FORMULA of Dimethyl sulfoxide is (CH3)2·S=O. Hence the molecular WEIGHT of Dimethyl sulfoxide is (1*12+3*1)*2+(1*32)+(1*16)=78.

The correct option is (d) CUPROUS ammonia

Best explanation: Cellulose is INSOLUBLE in water, dilute acid, alkali, and ordinary ORGANIC solvents whereas it is SOLUBLE in cuprous ammonia and in mixture of sodium HYDROXIDE and carbon disulfide.

Correct option is (c) AMMONIA

The best I can explain: Ammonia ADDITION or rapid COOLING using water in plate coil exchanger STOPS the de polymerization reaction which is responsible for dextrin production.

Correct choice is (a) STARCH from maize contains 15-30% AMYLOPECTIN and 85-70% amylose

Best explanation: It is a high polymer CARBOHYDRATE, starch produced from maize kernels contain 15-30% amylose and 85-70% amylopectin. It is hydrolyzed by acids, alkalis, and ENZYMES. Starch can form gel on reaction with WATER under suitable conditions.

The correct choice is (d) Water-based PAINTS

The explanation: Water-based paints doesn’t require diluents where as oil-based paints, lacquers, and varnishes USES NAPHTHA’s and turpentine as diluents (THINNER).

The correct option is (a) True

For explanation: SEVERAL WAYS of dewatering pulp which is useful in its shipping are hydraulically pressing pulp, vacuum flash drying, and EXTRUSION in form of noodles or dried to 90% solids.

The correct CHOICE is (c) TURBINE agitators

To explain: Batch hydrogenators use COILS for heating and cooling, turbine agitators to disperse the injected hydrogen. They treat 5-30 tons of oil/batch.

Right ANSWER is (a) GARDENING

The explanation: Study of gardening is CALLED horticulture. Study of any TYPE of cell is known as cytology. Aquaculture is study of GROWTH of fish similar to ichthyology.

The correct OPTION is (d) Linolenic ACID

Explanation: Chemical formulas of STEARIC acid, Linoleic acid, Oleic acid, Linolenic acid are C17H35, C17H33, C17H33, C17H29. As linolenic acid has HIGHEST degree of saturation, it has more REACTIVITY towards oxygen.

The correct answer is (d) SPEARMINT oil

To EXPLAIN: Groundnut oil, coconut oil, cottonseed oil are all edible oils WHEREAS spearmint oil is an ESSENTIAL oil. Vegetable oil is used as synonym for edible oils.

Right OPTION is (d) High compression

To explain I would say: High compression is the cause of KNOCKING effect. Some anti-knocking AGENTS are used such as LEAD tetra methyl, lead tetra ethyl and so on which slow down the burning rate and hence reduce the knocking effect.

The CORRECT OPTION is (C) \(Octane\,number = \frac{power \, number-100}{3}+ 100\)

The explanation: \(Octane \, number = \frac{power \, number-100}{3}+ 100\) is the relationship between octane number and power number. Power extracted from the system is the BASIS for power number.

The correct OPTION is (d) HYDROXY ETHYL cellulose

Best explanation: Methyl cellulose is used as thickening agent in cosmetics whereas hydroxy ethyl cellulose is used as THICKENERS in food. Ethyl cellulose is used in LACQUERS and plastic compositions.

Right option is (b) False

To explain I would say: The STATEMENT is false, because when paper is PULLED through the DRYER; the paper will shrink on drying. HENCE the machine should have a tendency of stretching, so that there will be a FORCE balance.

Right option is (a) 8-10% ALCOHOL

To elaborate: 8-10% alcohol in FERMENTED LIQUOR is called beer. AZEOTROPIC alcohol-water mixture contains 95% ethanol. 50-60% alcohol is taken from the beer still.

Right option is (a) Bagasse

The best explanation: Pulp EXTRACTED from the last pressure MILL with grooved WALLS is called Bagasse. It is used for making insulating BOARD and can be used as fertilizer, cattle feed, and in paper making.

Right option is (b) TURPENTINE

To elaborate: In India the natural SOLVENT is turpentine. Pine OIL and dipentene production is done from turpentine. Synthetic solvents such as BUTYL alcohol, butyl acetate etc are developed.