Question # 1

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

The orbital which can accommodate a maximum of 10 electrons is

Choose an answer

f

p

s

d

The atomic radii of elements lie in the order of

Choose an answer

10⁸cm

10^-12cm

10^-8cm

10¹²cm

In general, for exothermic reactions to be spontaneous

Choose an answer

Temperature should be high

Temperature should be zero

Temperature should be low

Temperature has no effect

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

total number of d-electrons in an atom of atomic number 26 is:

Choose an answer

7

4

6

5

Hess's law deals with

Choose an answer

Changes in heat or reaction

Rate of reaction

Equilibrium constant

Influence of pressure on volume of a gas.

Total values of magnetic quantum number (m) can be calculated with the expression

Choose an answer

2n²

2l + 1

2(2l+ 1)

3n²

The bond dissociation energies of H₂,CL₂ and NCI are 104, 58 and 103 kcal respectively.The enthalpy of formation of HCI gas will be

Choose an answer

-44 kcal

-88 kcal

-22 kcal

-11 kcal

Which rule allows only two electrons to be placed in an orbital

Choose an answer

Aufbau principle

Pauli's exclusion principle

Hund's rule

2n²

Which of the following has largest ionization energy

Choose an answer

F

O

Na

Mg

The quantum number that specifies the way the orbital is oriented in space is

Choose an answer

Electron spin quantum number

Angular momentum quantum number

Magnetic quantum number

Principle quantum number

Neutralization of strong acid with a strong base is:

Choose an answer

spontaneous reaction

reversible reaction

non-spontaneous reaction

chemical equilibrium

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

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

Choose an answer

Azimuthal

Spin

Principle

Magnetic

Which are not electromagnetic radiations

Choose an answer

X-rays

Sound waves

Proton

Radio waves

Positive particles in discharged tube is produced by ionization of gas molecules which is caused by

Choose an answer

Gas molecules collide with anode

Gas molecules are at high temperature

Cathode rays remove the electrons from gas molecules

Gas molecules produce X-rays

Generally first ionization energy increases across a period. The first ionization energy of N is higher than that of O. The reason for that is

Choose an answer

the attractive force from the nucleus per electron is higher in N

the electron pair in one of the p orbitals of O creates a high energy system,decreasing the energy required to ionize

in oxygen the 2 electrons in 2P_xfurther shield the valence electrons thus the ionization energy is lower

N has smaller atomic radius

In order to decompose 9 g of water 142.5 kJ of heat is required.Hence enthalpy of formation of water is

Choose an answer

-142.5 kJ

+142.5 kJ

-285 kJ

+285 kJ

Choose the reactions which mostly give stable products:-

Choose an answer

isothermal reactions

exothermic reactions

endothermic reactions

none of 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

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