SBR is produced by the copolymerisation of butadiene & styrene by employing emulsion polymerisation. The weight ratio of styrene and butadiene is maintained at September 7, 2025 by Admin 1:03 3:01 1:02 2:01 ✅ The correct answer is option A.
In step growth polymerisation, generally only one type of reaction & some basic mechanism is involved. Step growth polymerisation reaction is not involved in the manufacture of September 7, 2025 by Admin cross linked polystyrene. phenol formaldehyde resins. polyesters. polyamides. ✅ The correct answer is option A.
High __________ is an undesirable property for a good refrigerant. September 7, 2025 by Admin A. Specific heat B. Latent heat of vaporisation C. Viscosity D. Specific vapor volume ✅ The correct answer is option C.
Zeigler process September 7, 2025 by Admin produces high density polythene. uses no catalyst. produces low density polythene. employs very high pressure. ✅ The correct answer is option A.
As the time is passing, entropy of the universe September 7, 2025 by Admin A. Is increasing B. Is decreasing C. Remains constant D. Data insufficient, can’t be predicted ✅ The correct answer is option A.
Enthalpy changes over a constant pressure path are always zero for __________ gas. September 7, 2025 by Admin A. Any B. A perfect C. An easily liquefiable D. A real ✅ The correct answer is option B.
Heating of water under atmospheric pressure is an __________ process. September 7, 2025 by Admin A. Isochoric B. Isobaric C. Adiabatic D. Isothermal ✅ The correct answer is option B.
For a stable phase at constant pressure and temperature, the fugacity of each component in a binary system __________ as its mole fraction increases. September 7, 2025 by Admin A. Decreases B. Increases C. Remains same D. Decreases linearly ✅ The correct answer is option B.
The equation Tds = dE – PdV applies to September 7, 2025 by Admin A. Single phase fluid of varying composition B. Single phase fluid of constant composition C. Open as well as closed systems D. Both B and C ✅ The correct answer is option D.
The first law of thermodynamics is a statement of conservation of September 7, 2025 by Admin A. Heat B. Momentum C. Energy D. Work ✅ The correct answer is option C.