Free MCQs & Online Quiz Practice for Exams

Q: If Rutherford had used neutrons instead of alpha particles in his scattering experiment, the neutrons would:

A) Not deflect because they have no charge

B) Have deflected more often

C) Have been attracted to the nucleus easily

D) Have given the same results

Q: Electron in its ground state does not:

A) Spin

B) Revolve

C) Radiate energy

D) Reside in orbit

Q: Which statement about ¹²₆X and ¹⁴₆Y is false?

A) They are isotopes

B) They are the same elements

C) They have the same number of electrons

D) They have the same number of neutrons

Q: The neutron particle:

A) Has a mass equal to that of an electron

B) Has a mass approximately equal to that of a proton

C) Has charge equal to but opposite to that of an electron

D) Has a positive charge

Q: Isotopes of the same element have:

A) The same number of protons

B) The same number of neutrons

C) Different number of electrons

D) The same mass number

Q: Which one is the lightest?

A) An alpha particle

B) A hydrogen atom

C) An electron

D) A proton

Q: The nucleus of an atom has all of the following characteristics except that it:

A) Is positively charged

B) Is very dense

C) Contains nearly all of the atom's mass

D) Contains nearly all of the atom's volume

Q: L-shell has sub-shell(s):

A) s

B) s and p

C) s, p and d

D) s, p, d and f

Q: Which of the following elements is in the same family as fluorine?

A) Silicon

B) Antimony

C) Iodine

D) Arsenic

Q: Which of the following would have the smallest ionization energy?

A) K

B) P

C) S

D) Ca

Q: An element has configuration 2,8,1. It belongs to:

A) Group I and III period

B) Group III and I period

C) Group I and VII period

D) Group VII and III period

Q: Which of the following elements would be most similar to carbon?

A) Nitrogen

B) Boron

C) Oxygen

D) Silicon

Q: s-block elements are:

A) Metals

B) Non-metals

C) Metalloids

D) Transition

Q: Which of the following would have the largest ionization energy?

A) Na

B) Al

C) H

D) He

Q: Elements in a ___ have similar chemical properties:

A) Period

B) Group

C) Both A and B

D) Neither A nor B

Q: An element has 8 electrons in its valence shell. It is a member of:

A) Alkali family

B) Halogen family

C) Noble family

D) Carbon family

Q: The modern periodic table is based on:

A) Law of triad

B) Law of octave

C) Mendeleev's periodic law

D) Modern periodic law

Q: Shielding effect is due to:

A) Neutron

B) Proton

C) Proton and Neutron

D) Electron

Q: Absorption of water molecules through root hairs is due to

A) Active transport

B) Diffusion

C) Osmosis

D) Pressure flow

Q: According to pressure-flow theory one of the following is NOT a sink

A) Root

B) Leaves

C) Stem tubers

D) Fruits