A. The aromatics have lower octane number than naphthenes with same number of carbon atoms

B. Branched chain paraffins have higher octane number than straight chain paraffins with same number of carbon atoms

C. Octane number of paraffins increases with increasing number of carbon atoms

A. Phenol & acetaldehyde

B. Urea & formaldehyde

D. Propylene

A. Ethyl chloride

B. Chloroform

D. Ethylene dichloride

A. Radioactive decay of fission products

B. Kinetic energy of neutrons

D. Instantaneous release of ?-rays

A. The relative volatility of a binary mixture at the Azeotropic composition is 1

B. For a non-reacting binary mixture of ideal gases, the partial pressure distribution of both

C. ponents is nonlinear in the case of steady state unimolal unidirectional diffusion

E. The mole fraction of solute is directly proportional to the molality of a dilute solution

B. nts) in froth floatation process

C. ter coal

D. Pine oil is used as a modifying agent (for activating or depressing the adsorption of filming

E. Angle of repose is always greater than the angle of slide

F. A silo is a short height vessel of very large diameter used for the storage of high volatile

A. Increased residence time results in the decreased severity of cracking

B. At low pressure, the yield of lighter hydrocarbons are more

D. Moderate changes in operating temperature does not change the depth of cracking

B. A dust catcher is simply an enlargement in a pipeline which permits the solids to settle down

C. Recycled coarse material to the grinder by a classifier is termed as circulating load

D. Wear and tear in wet crushing is more than that in dry crushing of materials

E. to reduction in velocity of the dust laden gas

A. Nylon

B. Polystyrene

D. None of these

A. Is less hard (in the range of silver)

C. Is highly ductile

D. Resembles steel in appearance

A. In a first order reaction, A ? products; the reaction becomes slower as it proceeds, because

B. concentration of A decreases and the rate is proportional to the concentration of A

C. mentary

D. If the rate of an irreversible reaction, A + B ? 2C is k.CA.CB, then the reaction is always

E. Transition state theory approaches the problem of calculating reaction rates by concentrating

F. the idea of activated complexes

B. Pentogens

C. Lignin

D. Cellulose

A. Natural rubber

B. Unvulcanised raw rubber

D. Adhesive

A. None of these

C. Of the same monomer by elimination of small molecules of water

D. With the elimination of small amount of water

A. Speed of ?-rays is more than that of ?-rays

B. In ?-decay, the ratio of neutron to proton decreases

C. Ionising power of ?-rays is higher than that of ?-rays

A. The absence of chlorine atoms in its monomer

B. Its linear chain structure

D. Its cross-linked structure

B. 4-Jan

C. 2-Jan

D. 8-Jan

B. cumulative analysis unlike differential analysis

C. A gate diagram is a plot of cumulative percent by weight undersize vs. the reciprocal of

D. meter, in which the area beneath the curve represents the surface

E. throwing of the balls through the air to the toe of the heap is called cataracting

F. Cumulative analysis for determining surface area is preferred over differential analysis,

A. Inverse square

C. Linear

D. Logarithmic

A. Distributed parameter approach gives partial differential equation

B. Proportional controller is normally used for level control in industrial applications

D. Non-linear behaviour is exemplified by an on-off controller

A. Polonium

B. Uranium

C. Hafnium

B. Exit age description function E. and internal age distribution function (I) are related as, E = -(dI/d?)

C. A higher temperature favours the reaction of higher activation energy

D. Chemisorption studies are useful in the determination of catalyst surface area and pore size distribution

B. PVC

C. High density polythene

D. Cellulose nitrate

B. Economic power generation

C. Power generation on commercial scale

D. None of these

A. U-238

B. Th-232

C. None of these

A. U-233

C. U-235

D. Pu-239

B. More atomic weight

C. Less atomic weight

D. More atomic number

A. Protons

B. Electrons

C. Nucleons

A. Poly-methyl-methacrylate (PMMA)

C. A natural polymeric fibre

D. An amorphous polymer

A. A chemical reaction accompanied by evolution of heat is called an endothermic reaction

B. Chemical equilibrium state is dynamic in nature

D. A chemical reaction accompanied by absorption of heat is called an exothermic reaction

A. In a batch reactor, which is exclusively used for liquid phase reactions; temperature pressure and composition may vary with time

B. In a semi-batch reactor, one reactant is charged batch wise, while the other reactant is fed continuously

D. In a continuous flow reactor, both the reactants and the products flow out continuously

A. 1836 (approximately)

B. ?

D. 1

B. A condensation polymerisation product

C. A thermosetting material

D. None of these

A. 20C and 1 kgf/cm2

C. 0C and 1 kgf/cm2

D. 0C and 3 kgf/cm2

B. Epoxy resin

C. Spandex fibre

D. Polysulphide rubber

A. Uranium sulphate

C. Uranium oxide

D. Uranium carbide

A. Improve its elasticity

B. Reduce the melt viscosity & glass transition temperature

D. Improve its impact strength

A. 10-24 cm

B. 10-12 cm

D. 1 Angstrom

A. A photochemical reaction is catalysed by light

B. A chemical reaction occurs when the energy of the reacting molecule is less than the activation energy of the reaction

C. Chemical equilibrium is a static state

A. The operating cost of shaking screen is more than that of a vibrating screen

C. Screen capacity does not depend upon the specific gravity of the minerals

D. Asphalt is best crushed using toothed roll crusher

E. avoid discolouration of ceramic products</strong>

A. Styrene butadiene rubber (SBR)

C. Polyurethane

D. Phenol formaldehyde

A. Lignin

B. Starch

D. Gelatine

A. A catalyst remains unchanged in chemical composition at the end the reaction

B. A catalyst does not alter the final position of equilibrium in a reversible reaction

D. A catalyst is specific in reaction

B. Mattresses & foam

C. Adhesives

D. Coating material

A. It contains neutrons

B. Of uncertainty principle

C. It may have isobars

A. Produces very low density polythene

B. Employs a pressure of 30 kgf/cm2

C. Does not use any catalyst for polymerisation

A. Hydrocarbons of high specific gravity (e.g., aromatics) possess the maximum thermal energy per unit weight

B. Hydrocarbons of low specific gravity (e.g., paraffins) possess the maximum thermal energy per unit volume

C. Higher specific gravity of petroleum products means higher C/H ratio

A. Poly vinyl chloride

C. Polystyrene

D. Low density polythene

A. Fast breeder

B. Highly enriched uranium (85% U-235) fuelled

C. Homogeneous

A. Graphite as moderator

B. Molten sodium as coolant as well as moderator

C. Water as coolant