Q. The number of neutrons in an atom is equal to the :
1) Number of electrons
2) Mass number
3) Mass number - Atomic number
4) Atomic number
Q. The reflector of a search light is a :
1) plane mirror
2) cylindrical mirror
3) concave mirror
4) convex mirror
Q. Momentum is measured as the product of :
1) Mass and inertia
2) Mass and velocity
3) Mass and acceleration
4) Mass and force
Q. How many atoms are present in a (NH4)2SO4 molecule?
1) 15
2) 13
3) 14
4) 12
Q. Negative acceleration is in the opposite direction of :
1) velocity
2) force
3) momentum
4) distance
Q. When a number of resistors are connected in series in a circuit, the value of current :
1) decreases
2) becomes half
3) increases
4) remains the same
Q. A 4.0 kg object is moving horizontally with a speed of 5.0 m/s. To increase its speed to 10 m/s, the amount of net work required to be done on this object is :
1) 150 J
2) 100 J
3) 75 J
4) 50 J
Q. In Mendeleev's periodic table, the properties of the elements are considered a periodic function of their :
1) Atomic number
2) Atomic mass
3) Atomic size
4) Ionization enthalpy
Q. The focal length of a concave mirror with a radius of curvature of 20.0 cm is :
1) 20 cm
2) 2 cm
3) 15 cm
4) 10 cm
Q. The main cause of rancidity in foods is the ........ of fats and oils.
1) clarification
2) reduction
3) oxidation
4) hydrolysis
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