B. Greater the degree of cross-linking in the polymer, lesser is its solubility

C. Swelling tendency or solubility of polymers in a particular solvent decreases with increase in molecular weight of the solvent

D. Polymers having more aliphatic character are more soluble in aliphatic solvents, while those polymers having more aromatic character are more soluble in aromatic solvents

A. Fluorescence of oils helps to detect its adulteration

C. Lighter petroleum distillates are lighter in color than the heavier residual oils

D. Color of petroleum products indicates the degree of refinement

A. Dissolving in water

B. Froth floatation technique

C. Smelting in a furnace

B. Cant attain high temperature at normal pressure

C. Is not at all corrosive, even at a higher temperature

D. None of these

E. tact with air or water</strong>

A. PVC

B. Polystyrene

C. Nylon-66

A. Infrared

B. ? and ?

C. X

B. The mass of deuterium atom is half that of helium atom

C. ?-particle is identical with a doubly charged helium ion

D. The ratio of the density of the nucleus to that of the atom is 1012

A. Polythene

B. PVC

D. Polystyrene

A. Density; hence core volume for a given power output would be smaller

B. Resistance to effects of irradiation

D. Melting point, hence can be subjected to higher temperature

A. Presence of inerts affects the equilibrium conversion of

B. Use of different catalysts in a reversible catalytic chemical reaction does not change the

C. Alumina is added as a promoter to iron catalyst in ammonia synthesis reaction

D. ilibrium composition

A. One important copolymer of styrene is SBR, which is widely used in the manufacture of

B. For the manufacture of styrene, the major raw materials are benzene and ethylene

C. omobile tyres

E. Manufacture of phenol by chloroben-zene-eaustic process involves. The chlorination of benzene, causticisation and hydrolysis

B. 30

C. 20

D. 5

B. Ergs

C. Barn

D. MeV

A. Mercury in glass thermometer (without any covering or air gap)

B. Bare metallic thermometer

C. Bare vapor pressure thermometer

A. Economic power generation

C. Power generation on commercial scale

D. None of these

A. Para-cresol

B. Phenol

C. Resorcinol

A. Bakelite

B. None of these

C. Epoxy resin

A. 1.2 gm atoms of carbon and 1.5 gm moles of oxygen are reacted to give 1 gm mole of carbon dioxide. The limiting reactant is carbon. The percent excess reactant supplied is 25

C. A gas bubble at a pressure of Pg is passed through a solvent with a saturation vapour pressure of Ps. If the time of passage of the bubble is long and air is insoluble in the solvent, the mole fraction of solvent in the bubble will be equal to Ps/Pg

D. To make 100 kg of a solution containing 40% salt by mixing solution A (containing 25% salt) and solution B (containing 50% salt), the amount of solution A required is 40 kg

A. Isobars

C. Isotopes

D. Isotones

A. Hammer crushers operate by impact action

B. With increase in mesh number of screens, their diameter in microns decreases

D. Standard screens have circular opening

A. Addition of catalyst changes the equilibrium constant

B. A catalyst speeds up the forward reaction but slows shown the reverse reaction

C. The composition of equilibrium is changed by catalyst

A. Inorganic polymer

B. Unsaturated polyester

D. Polyamide

A. Amount of element present

B. Temperature

D. Pressure

A. Arrhenius equation describing the effect of temperature on rate constant is given by,

B. A.e-Ea/RT

C. n the rate of disappearance of CH3CHO is equal to K.CCH3I.CHI and acts as a catalyst</strong>

D. Two mixed reactors of unequal size are available for producing a specified product, formed by

E. omogenous second order reaction. To achieve maximum production rate, the smaller

F. I + HI ? CH4 + I2; fast

A. Number of protons

B. Atomic numbers

C. Number of electrons

B. Formica table tops

C. Fountain pen barrels

D. Combs

A. 2 1023

B. 5 105

C. 6 1032

A. Absorb the fast neutrons

B. Slow down the secondary neutrons

D. Protect the fuel element from coming in contact with the coolant

A. Polyurethane

C. Polyester

D. High density polythene

B. Poor tensile strength

C. Greater amount of heat build up heavy loading

D. Poorer resistance

B. Uranium-235

C. Uranium-233

D. Plutonium-239

A. 9.31

B. 93.1

C. 9310

A. Decreases with increase in temperature

B. Does not vary with temperature rise

C. Decreases with increase in molecular weight

A. Calcium

C. Mercury

D. Zinc

A. Harder

B. Stronger

D. Lighter

A. 1 kcal/kg = 1.8 BTU/lb = 4.186 kJ/kg

B. 1 BTU/ft3 = 8.9 kcal/m3 = 0.038 MJ/m3

D. 1 kcal/m3 = 0.1124 BTU/ft3

A. Polyamide & an elastomer

B. Good adhesive

C. Surface coating agent

A. Electrons

C. Protons

D. Neutrons

A. 1000

B. 20

D. 2000

A. As an anti-skimming agent in paint

B. As a plasticiser for unsaturated polyester

C. None of these

A. Polyurethane

C. Polybutadiene

D. Styrene butadiene rubber (SBR)

A. Cold SBR

C. Buna S

D. Bunai N

B. Cod oil, beef tallow or aluminium stearates are used as grinding aids in cement industries

C. Size enlargement is a mechanical operation exemplified by medicinal tablet making

D. Close circuit grinding is more economical than open circuit grinding

A. Teflon

B. Bakelite

D. Perspex

B. Surrounding it by neutron absorbing material

C. Cooling it

D. Heating it

A. Hydrofluoric acid

C. Sulphuric acid

D. None of these

A. U-233

B. Pu-239

C. U-238

A. Polystyrene

B. Polyamide

D. Polyacrylonitrile

A. Clausius-Clapeyron equation relates the latent heat of vaporisation to the slope of the vapor pressure curve

C. Clapeyron equation is given by dP/dT = (?/T) (VG VL); where, P = vapor pressure, T = absolute temperature, ? = latent heat of vaporisation, VG and VL = volumes of gas and liquid respectively

D. At the boiling point of liquid at the prevailing total pressure, saturated absolute humidity is infinite

A. Thermoplastics

C. Elastomers

D. Fibres