Question

1.Which one of the 0.1 M solutions of C2H5OH, HC2H3O2 and NaC2H3O2, in water will cause of the light bulb to glow most brightly?

2.For a functional group having a carbon atom singly bonded to an electronegative atom,

(a) this carbon atom is likely to bear a partial positive charge.

(b) bonding electrons are to be delocalized within this functional group

(c) it appears as an essential part of ester molecules. (d) it appears as an essential part of ketone molecules.

3.Work function is defined as:

(a) The minimum energy for an electron to escape from a particular metal surface

(b) A distribution of a set of measurements which the experimental errors are random.

(c) The work needed to remove an electron from an atom which is in its ground state

(d) The greater the quantum number, the closer quantum physics approaches classical physics

4.For particle to behave as a de Broglie wave, what is the following is required?

(a) with spin (b) carry charge (c) with momentum

(d) massless

5. A cylindrical conductor of circular cross section has a radius a and a resistivity p and carries a constant current I. What are the magnitude and direction of the H-vector at the same point?

(a) pI/πa^2 ,parallel to wire

(b) Ir/2πa^2 ,parallel to wire

(c) pI/πa^2 ,perpendicular to wire

(d)) Ir/2πa^2,perpendicular to wire

6.A particle is traveling in the positive x-direction at a constant speed of 0.8C. When a force of 10 N is applied to the particle also in the positive x-direction, the acceleration of the particle is 0.216 m/s^2 What is the weight of the particle? (C is the speed of light.)

7. The maximum frequency in an x-ray machine with acceleration voltage being 25KV is?

Answer 1