MCQs

Q211: The velocity of a car travelling on a straight road in 36km/h^-1 at an instant of time. Now travelling with uniform acceleration for 10s, the velocity becomes exactly double if the wheel radius of the car is 25 cm then which of the following number is the closest to the number of revolution that the wheel makes during this 10s?

• A) 126
• B) 95
• C) 84

Q212: A bomber drops a bomb, when it is vertically above the target. It misses the target because ______?

• A) Horizontal component of the velocity of bomber
• B) Vertical component of the velocity of bomber
• C) Force of gravity

Q213: A current of 1A is flowing along positive x-axis through a straight wire of length 0.5m placed in a region of a magnetic field given by B = (2i + 4j)T. The magnitude and the direction of the force experienced by the wire respectively are ______?

• A) 2N, along positive z-axis
• B) 4N, along positive z-axis
• C) 3N, along positive z-axis

Q214: The characteristics of reversible reaction is?

• A) It can never produced to completion
• B) the number of moles of reactant and protect are equal
• C) it can be influenced by the catalyst

Q215: In periodic table elements are arranged according to ____?

• A) Increasing atomic mass
• B) Decreasing atomic number
• C) Increasing in atomic number

Q216: Which of the following is true for a reversible reaction at equilibrium?

• A) The rates of the forward is greater than backward reaction
• B) The rates of the forward is lesser than backward reaction
• C) The rate of the backward is equal to forward reaction

Q217: A catalyst ______?

• A) Increases the average kinetic energy of the reactants
• B) Alters the reaction mechanism
• C) Increases the activation energy

Q218: Express 0.0064 in simplest scientific form?

• A) 6.4×10 ^−3
• B) 6.4 × 10 ^− 4
• C) 6.4 × 10 ^− 2

Q219: The percentage of water in whole Milk is about _____?

• A) 70%
• B) 87%
• C) 75%

Q220: During one oscillation, phase of oscillation changes by _____?

• A) π⁄2 rad
• B) π rad
• C) 2π rad