57) An electric current is passed through an aqueous solution of the following. Which one will decompose
1) Urea
2) Glucose
3) Silver nitrate
4) Ethyl alcohol
Ans: silver nitrate
58) The substance which decelerates the rate of chemical reaction is called
1) A Positive catalyst
2) A polymer
3) An auto catalyst
4) An inhibitor
Ans: An inhibitor
59) Isotonic solutions are solutions having the same
1) Vapour pressure
2) Concentration
3) osmotic pressure
4) viscosity
Ans: Vapour pressure
60) The energy of molecular motion appears in the form of
1) Friction
2) Temperature
3) Heat
4) Potential energy
Ans: potential energy
61) Two similar wires of equal length and of same material having diameters in the ratio 1:2 are connected in series. When a steady current is passed through them, the ratio of heat produced in the respective wires is
1) 3:1
2) 2:1
3) 4:1
4) 1:4
Ans: 4:1
The emf E in a thermoelectric circuit with one junction at 0 deg Celsius and the other at t deg Celsius is given by E=at+bt^2
1) –a/2b
2) 2b/a
3) a/b
4) b/a
Ans: -a/2b
63) The ionization energy of hydrogen atom is
1) 0.52 eV
2) 13.6 eV
3) -13.6 eV
4) – 0.52 eV
Ans: - 13.6 eV
64) The phenomenon that proves that light is a transverse wave is
1) Interference
2) Polarization
3) Diffraction
4) Double refraction
Ans: Polarization
65) The phenomenon of capillary action is due to
1) Osmosis
2) Surface tension
3) Diffusion
4) Viscosity
Ans: surface tension
66) Non- renewable source of energy is
1) Solar energy
2) Geothermal energy
3) Atomic energy
4) Wind energy
Ans: Atomic energy
67)An example of fire tube boiler is
1) locomotive boiler
2) babcock and Wilcox boiler
3) volex boiler
4) vertical boiler
Ans: locomotive boiler
68) An example of hand forging operation is
1) Drawing
2) Extrusion
3) Upsetting
4) Roll forging
Ans: upsetting
69) The percentage of carbon in hypo eutectic steel is
1) Less than 1.2 %
2) Less than 0.8 %
3) More than 0.8 %
4) Equal to 0.8 %
Ans: Less than 0.8 %
70) An isomorphous alloy is one which has
1) 100 % solid solubility
2) 100 % liquid solubility
3) 100 % solid as well as liquid solubility
4) Less than 100 % solid solubility
Ans: 100 % solid as well as liquid solubility
71) schottky defect is an example of
1) Point defect
2) Line defect
3) Plane defect
4) Volume defect
Ans: Point defect
72) The phenomenon of hysteresis is exhibited by
1) Cu
2) Mn
3) Hg
4) Fe
Ans: Cu
Ans: Cu
73) The light emitting diode works on the principle on the principle of
1) Photo luminescence
2) Turbo luminescence
3) Thermo luminescence
4) Electroluminescence
Ans: electroluminescence
74) The maximum coordination number for metals is
1) 4
2) 6
3) 8
4) 12
Ans: 12
75) Very high elongation under tensile load is found in the case of
1) Rubbers
2) Metals
3) Ceramics
4) Composites
Ans: Rubbers
