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Here are 20 MCQs (questions 61 to 80) with answers based on the syllabus content you provided for AP DDSC Secondary Grade Teacher SGT 2025:

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61. Which of the following is a property of metals?
a) Poor conductors of heat
b) Malleable
c) Brittle
d) Non-lustrous
Answer: b) Malleable

62. What type of solution is formed when no more solute can dissolve in a solvent at a given temperature?
a) Saturated solution
b) Unsaturated solution
c) Supersaturated solution
d) Dilute solution
Answer: a) Saturated solution

63. Which gas is produced when an acid reacts with a metal?
a) Oxygen
b) Carbon dioxide
c) Hydrogen
d) Nitrogen
Answer: c) Hydrogen

64. What is the process of preventing rust on iron by coating it with zinc called?
a) Crystallization
b) Galvanization
c) Neutralization
d) Electroplating
Answer: b) Galvanization

65. Which of the following is NOT a standard unit of measurement?
a) Meter
b) Kilometer
c) Foot
d) Centimeter
Answer: c) Foot

66. What type of motion does a pendulum exhibit?
a) Linear motion
b) Circular motion
c) Oscillatory motion
d) Random motion
Answer: c) Oscillatory motion

67. The speed of an object is calculated by the formula:
a) Distance × Time
b) Distance ÷ Time
c) Time ÷ Distance
d) Distance + Time
Answer: b) Distance ÷ Time

68. Which object produces a shadow?
a) Transparent object
b) Opaque object
c) Translucent object
d) None of the above
Answer: b) Opaque object

69. A mirror that curves inward is called:
a) Convex mirror
b) Concave mirror
c) Plane mirror
d) Spherical mirror
Answer: b) Concave mirror

70. Which device is used to protect electrical circuits from overload?
a) Fuse
b) Battery
c) Resistor
d) Capacitor
Answer: a) Fuse

71. Which of the following is a good conductor of electricity?
a) Plastic
b) Wood
c) Copper
d) Rubber
Answer: c) Copper

72. What kind of magnet can be turned on and off?
a) Permanent magnet
b) Temporary magnet
c) Electromagnet
d) Bar magnet
Answer: c) Electromagnet

73. Heat transfer through direct contact is called:
a) Conduction
b) Convection
c) Radiation
d) Reflection
Answer: a) Conduction

74. Which of the following is an example of non-contact force?
a) Friction
b) Gravity
c) Push
d) Pull
Answer: b) Gravity

75. Atmospheric pressure is the pressure exerted by:
a) Water
b) Air
c) Earth
d) None of the above
Answer: b) Air

76. The force that opposes the motion of objects when they rub against each other is called:
a) Gravity
b) Friction
c) Magnetism
d) Pressure
Answer: b) Friction

77. What type of friction occurs when an object moves through air or water?
a) Static friction
b) Sliding friction
c) Fluid friction
d) Rolling friction
Answer: c) Fluid friction

78. Which of the following is used to measure temperature?
a) Barometer
b) Thermometer
c) Speedometer
d) Ammeter
Answer: b) Thermometer

79. What happens when light passes through a prism?
a) Reflection
b) Refraction
c) Dispersion
d) Absorption
Answer: c) Dispersion

80. Which part of the eye controls the amount of light entering the eye?
a) Retina
b) Cornea
c) Iris
d) Lens
Answer: c) Iris

 

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