- (A) There is no transfer lag for a single first order system
- (B) Stirred tank with a water jacket exemplifies an interacting system
- (C) Transfer lag is a characteristic of all higher order systems (other than first order systems)
- (D) Transfer lag decreases as the number of stages decreases
Chemical Engineering Mcqs
- (A) α-particle emission from a radioactive element makes it electrically negative
- (B) β-particle emission from a radioactive element makes it electrically positive
- (C) A radioactive element having a half life period of 20 years will completely disintegrated in 40 years
- (D) The disintegration constant of a radioactive isotope is independent of pressure, temperature or concentration
- (A) Atoms with same number of nucleons but different number of protons are called isobars
- (B) Atoms with same number of protons but different number of nucleons are called isoters
- (C) Out of α, β, and γ-rays, the one having maximum penetration power are γ-rays
- (D) The product formed by emission of α-particle has mass number less by 4 units than the parent nuclide
- (A) The nucleus of a hydrogen atom is identical with a proton
- (B) A, β-ray particle is identical with an electron
- (C) Mass of an electron is about 1/1800th of the lightest nucleus
- (D) Positron is heavier than a proton
- (A) The ratio of the density of the ‘nucleus’ to that of the ‘atom’ is 1012
- (B) α-particle is identical with a doubly charged helium ion
- (C) The mass of deuterium atom is half that of helium atom
- (D) Gamma rays are high energy electrons
- (A) Positron is the antiparticle of electron
- (B) In α-decay, the ratio of neutron to proton decreases
- (C) Ionising power of β-rays is higher than that of α-rays
- (D) Speed of α-rays is more than that of γ-rays
- (A) Loss of electrons from neutral atoms produces negative ions
- (B) The radius of nucleus & atomic size are of the order of 10-12 cm & 10-8 cm respectively
- (C) Gain of electrons by neutral atoms form cations
- (D) Proton to neutron ratio in a stable nucleus is 2 : 1
- (A) The disintegration rate of a radioactive substance cannot be increased by heating it
- (B) Electrons have negligible mass and unit negative change
- (C) Deuterium atom has one proton and two neutrons in its nucleus
- (D) Cadmium is capable of absorbing neutrons
- (A) Multigrade lubricating oils have high viscosity index
- (B) Paraffinic oil has very high viscosity index
- (C) Naphthenic oil has very low viscosity index
- (D) High viscosity index means a large change in viscosity with change in temperature
- (A) Clausius-Clapeyron equation relates the latent heat of vaporisation to the slope of the vapor pressure curve
- (B) At the boiling point of liquid at the prevailing total pressure, saturated absolute humidity is infinite
- (C) Percentage saturation and relative saturation are numerically equal for an unsaturated vapor gas mixture
- (D) Clapeyron equation is given by dP/dT = (λ/T) (VG – VL); where, P = vapor pressure, T = absolute temperature, λ = latent heat of vaporisation, VG and VL = volumes of gas and liquid respectively
