A. Sulphur stick, which on detection gives white smoke
B. Using chemical reagents
C. Its smell
D. Soap solution
Related Mcqs:
- The most important consideration, while designing the refrigeration system of an aircraft is that the refrigeration system_________________?
A. Is as light as possible
B. Has very high C.O.P.
C. Employs minimum quantity of refrigerant
D. Consumer minimum horse power - One ton of refrigeration is not equivalent to the heat removal rate of ____________________?
A. 200 BTU/minute
B. 50 kcal/minute
C. 50 kJ/sec
D. 3.5 KW - Ammonia gas can be dried by___________________?
A. PCl5
B. Quick lime
C. CaCl2
D. Concentrated H2SO4 - Heat transfer to the water wall in a high pressure water wall type boiler furnace is mainly by_________________?
A. Conduction
B. Convection
C. Radiation
D. Both A. & B. - The mechanism involved in the removal of metal in drilling operation is by_________________?
A. Compression
B. Extrusion
C. Shearing
D. Both B & C - The emf of a Deniell cell “Zn | Zn2+ || Cu2+ | Cu” can be increased by_________________?
A. Decreasing the surface area of the electrodes
B. Increasing the concentration of zinc sulphate solution
C. Increasing the surface area of the electrodes
D. Increasing the concentration of copper sulphate solution - The efficiency of a Carnot heat engine operating between absolute temperatures T1 and T2 (when, T1 > T2) is given by (T1 – T2)/T1. The co-efficient of performance (CO.P.) of a Carnot heat pump operating between T1 and T2 is given by_________________?
A. T1/(T1-T2)
B. T2/(T1-T2)
C. T1/T2
D. T2/T1 - Plants produce carbohydrates from the CO2 present in the atmosphere by_________________?
A. Polymerisation
B. Photochemical reaction
C. Oxidation
D. None of these - Liquor poisoning generally occurs due to the presence of _______________ in it?
A. Ethyl alcohol
B. Impurities
C. Methyl alcohol
D. Carbonic acid - In case of a, centrifugal pump, the ratio h1/h2 is termed as the _____________ efficiency (where, h1 = actual measured head & h2 = head imparted to the fluid by impeller)?
A. Mechanical
B. Overall
C. Volumetric
D. Impeller
