Question # 1

The charge of an electron is determined by

Choose an answer

J.J Thomson

Crooks

Perrin

R.A Millikan

Glow is produced due to

Choose an answer

Electronic current

Gas molecule

Anode

Cathode

Evaporation of water is

Choose an answer

An exothermic change

An endothermic change

A process where no heat changes occur.

A process accompanied by chemical reaction.

For a 3P subshell the set of principal and azimuthal quantum numbers is

Choose an answer

n = 1, I = 2

n = 3, I = 0

n = 3, I = 1

n = 1, I = 3

For a reaction to occur spontaneously

Choose an answer

Δ H must be negative

Δ H must be positive

Δ H must be zero

Δ H must be unity

Which of the following is not a property of cathode rays. These rays

Choose an answer

Comprise neutron particles

Can produce X-rays when they strike a heavy metal anode

Can cause reduction reaction

Produce fluorescence in rare earth and mineral

The letter s,p,d,f are used to represent which quantum number

Choose an answer

Azimuthal

Spin

Principle

Magnetic

Fora which equation is the enthalpy changes correctly described as an enthalpy change formation?

Choose an answer

2NO_(g)--->N_2(g)+ O_2(g)

2CO_(g)--->O_2(g) + 2CO_2(g)

H₂O_(l)--->NaCl_(s)+NaCI_(aq)

K_(s)+ Mn(s) + 2O_2(g)---> KMnO^4(s)

A system absorbs 500 kj heats and performs 250 kj work on the surrounding the increase in internal energy of the system is

Choose an answer

750 kj

500 kj

250 kj

1000 kj

The principle quantum number describes the

Choose an answer

Shape of the orbital

Spin of the electron

Distance from the nucleus

Orientation from the orbital

By convention the standard heat of formation of all compound is assumed to be

Choose an answer

Zero

Negative

Positive

Infinity

The correct relation between internal energy change, enthalpy change and work is:

Choose an answer

ΔH = ΔE - W

ΔH = W + ΔH

ΔH = ΔE + W

ΔE = ΔH - W = 0

The nature of the positive rays depend on

Choose an answer

the nature of the electrode

the nature of the discharge tube

the nature of the residual gas

all of the above

The mass of neutron is in the range of

Choose an answer

1.6750 x 10^-26kg

1.6750 x 10^-23kg

1.6750 x 10^-22kg

1.6750 x 10^-27kg

Chemical reaction involves energy change. The study of heat changes during chemical reaction is called:

Choose an answer

chemical equilibrium

thermochemistry

chemical potential

chemical kinetics

An atom absorbs energy which results in the excitation of its electron, Before excitation the electron was is 2s orbital, which orbital will the electron move to after excitation?

Choose an answer

3p

1s

3s

4s

Calorie is equivalent to:

Choose an answer

104184 J

41.84 J

4.184 J

418.4 J

The law of thermodynamics that provides the basis for the determination of absolute entropy of substance is

Choose an answer

Zeroth law

First law

Second law

Third law

In which of the following change entropy decreases

Choose an answer

Crystallization of sucrose in water

Melting of ice

Dissolving sucrose in water

Vaporization of camphor

Mass of electron

Choose an answer

1.6022 x 10^-19Kg

1.6022 x 10^-19g

9.10 x 10^-31Kg

9.10 x 10^-31g

Quantum numbers are derived from

Choose an answer

Schrodinger wave equation

De-Broglie's equation

Bragg's equation

Planck's equation

More Classes

Other Links

MDCAT Chemistry Chapter 3 Atomic Structure Online Test MCQs With Answers

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer