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Quiz 7
Mdcat-past-papers - IBA Quiz
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Board: IBA |
121. K is called specific rate constant because it is:
Rate per unit concentration
Temperature independent
Depends on concentration
Unitless
122. Number of sigma bonds in methyl chloride is due to spies overlap is/are:
1
2
3
4
123. When pressure is 1520 torr then density of oxygen gas will be:
64/RT
32/RT
16/RT
128/RT
124. Which equation is used to calculate concentration for n mole of an ideal gas?
P/RT
PV/RT
PV/RT
125. One of Mg is burnt with 32g of oxygen to form MgO, amount of excess reagent left is?
6g Mg
2g Mg
8g O₂
16g O₂
126. Which carbonyl carbon is more electrophilic:
HCOOH
HCHO
CH3COCH₃
CH₃COOH
127. An electron is projected along the positive x-axis in a magnetic field lying in xz-plane. The magnetic force on the electron will act along the:
x-axis
-x-axis
y-axis
-y-axis
128. The magnetic flux through a loop of 1 m² in a 0.5T magnetic field is same as magnetic flux through a loop of 0.5 m² in a magnetic field of:
1.0 T at 0°
1.0 T at 60°
2.0 T at 90°
0.5 T at 90°
129. A body of mass 10 kg is falling through a viscous medium and reached terminal velocity. The net force on the body will be:
0 N
9.8 N
98 N
980 N
130. The value of temperature co-efficient of a conductor is zero. This indicates that with the rise in temperature, resistance of conductor:
Increases
Decreases
Remain same
Becomes zero
131. The path difference between two sound waves coming from a coherent source of wavelength 50 cm at a point is 100 cm. The superposition of the waves at that point produces:
Beats
Echo
Loudness
Silence
132. Potential energy decreases in the process of:
Compressing a spring
Stretching a spring
Releasing a stretched spring
Holding the spring at maximum extension
133. A diver of mass m is swimming at a depth h below the sea level. If the reference level is taken at sea level, the gravitational potential energy of the diver is:
0
high
-high
2mph
134. A constant force F acts on a body and displaces it by distance Ad in a time dt. The rate at which force is doing work is:
F×Ad
F×dt
F×Ad/dt
F×dt/Ad
135. In circular motion, if angular displacement is kept constant, decreasing the radius will:
Increase linear displacement
Increase linear velocity
Decrease linear displacement
Not affect linear displacement
136. When force and displacement are in opposite direction then the work done is said to be:
Positive
Negative
Infinite
Maximum
137. In a step-up transformer, if the secondary voltage is increased by a factor of 10, the current in secondary coil will be:
10 times higher than the primary current
10 times lower than the primary current
Equal to the primary current
One-tenth of the primary current
138. When a droplet reaches terminal velocity, its acceleration is:
Zero
Variable
Not changed
Negative
139. Newton's original formula underestimated speed of sound in air because he:
Ignored viscosity
Assumed isothermal
Considered vacuum conditions
Assumed adiabatic
140. The point where the electric field is zero between two opposite charge lies:
Closer to the positive charge
At the mid-point
Closer to the negative charge
Nowhere between them
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