NEET Chemistry Chapter Wise Mock Test – Classification and Periodicity of Elements

NEET Chemistry Chapter Wise Mock Test – Classification and Periodicity of Elements

Question 1:
An eiement X belongs to fourth period and fifteenth group of the periodic table. Which one of the following is true regarding the outer configuration of X?
(a) It has-partially filled d-orbitals and completely filled s-orbitals
(b) Completely filled s-orbitals and completely filled p-orbitals
(c)Completely filled s-orbitals and half-filled p-orbitals
(d) Half-filled d-orbitals and completely filled s-orbitals

Question 2:

Question 3:
Chemical properties of lithidm and magnesium are similar because
(a) these belong to same group
(b) shows diagonal relationship
(c) both has same ionisation potential
(d) both has same electron affinity

Question 4:
Be resembles much with
(a) Li
(b)AI
(c) Zn
(d) Ra

Question 5:

Question 6:

Question 7:
Point out the wrong statement. On moving horizontally from left to right across a period in the periodic table
(a) metallic character decreases
(b) electronegativity increases
(c) gram atomic volume first decreases and then increases
(d) size of the atom increases for normal elements

Question 8:
In the periodic table going down in fluorine group
(a) stability of hydrides will increase
(b) ionic radii will increase
(c) electronegativity will increase
(d) IE will increase

Question 9:

Question 10:
Which of the following .pairs has almost same atomic radii?
(a) Al, Ga
(b) Be, Mg
(c) Mg, Al
(d) B, Be

Question 11:
When a neutral atom is converted into a cation, there is
(a) decrease in the atomic number
(b) an increase in the atomic number
(c) an increase in size
(d) a decrease in size

Question 12:
A trend common to both for group I and VII elements in the periodic table as atomic number increases its
(a) atomic radius increases
(b) oxidising power increases
(c) reactivity with water increases
(d) maximum valency increases

Question 13:
Ionic radii are
(a) inversely proportional to effective nuclear charge
(b) inversely proportional to square of effective nuclear charge
(c) directly proportional to effective nuclear charge
(d) directly proportional to square of effective nuclear charge

Question 14:
The first ionisation enthalpies of Na, Mg, Al and Si are in the order
(a) NaAIMg >AI >Si
(c) Na<Mg<AIMg>AI<Si

Question 15:
15. Which is not the correct order for the stated property?
(a) Ba > Sr > Mg ; atomic radius
(b) F > O > N ; first ionisation enthalpy
(c) Cl > F > I; electron affinity
(d) O > Se > Te; electronegativity

Question 16:
Alkali metals in each period have
(a) smallest size
(b) lower ionisation potential
(c) highest ionisation potential
(d) highest electronegativity

Question 17:

Question 18:

Question 19:
The ionisation energy of nitrogen is more than that of oxygen because
(a) nitrogen has half-filled p-orbitals
(b) nitrogen is left to the oxygen in the same period of the periodic table
(c) nitrogen contains less number of electrons
(d) nitrogen is less electronegative

Question 20:
When the first ionisation energies are plotted against atomic number, the peaks are occupied by
(a) alkali metals
(b) halogens
(c) transition metals
(d) rare gases

Question 21:
Which of the following elements will have the lowest first ionisation energy?
(a) Li
(b) Mg
(c) Ca
(d) Rb

Question 22:
The correct order of ionisation energy for comparing carbon, nitrogen and oxygen is
(a) C < N >0
(b) C >N< 0
(c) C >N>0
(d) C<N <O

Question 23:
Among the following the third ionisation energy is highest for
(a) magnesium
(b) boron
(c) beryllium
(d) aluminium

Question 24:
The set representing the correct order for the first ionisation potential is
(a) K >Na >Li
(b) Be >Mg >Ca
(c) B >C >N
(d) Ge >Si >C

Question 25:
The order of screening effect of electrons of s, p, d and f-orbitals of a given shell of an atom on its outer shell electrons is
(a) s>p>d>f
(b) f>d>p>s
(c) p<d<s>f
(d)f>p>s>d

Question 26:
Which of these have no unit?
(a) Electronegativity
(b) Electron affinity
(c) Ionisation energy
(d) All of these

Question 27:
The correct order of electron affinities of N, O, S and Cl is
(a) N < O < S < Cl
(b) 0 < N < Cl < S
(c) 0<CI<N<S
(d) O < S < Cl < N

Question 28:
Which one of the following elements has the maximum electron affinity?
(a) F
(b) Cl
(c) Br
(d) I

Question 29:
Which of the following pairs show reverse properties on moving along a period from left to right and from top to bottom in a group?
(a) Nuclear charge and electron affinity
(b) Ionisation energy and electron affinity
(c) Atomic radius and electron affinity
(d) None of the above

Question 30:
Which one of the following arrangements represents the correct order of electron gain enthalpy (with negative sign) of the given atomic species?
(a) Cl<F<S<O
(b)O <S <F< CI
(c) S<O<CI<F
(D)F<CL<O<S

Question 31:
For electron affinity of halogens, which of the following is correct?
(a) Br >F
(b) F>CI
(c) Br>CI
(d) F>I

Question 32:
Which of the following oxides is amphoteric in character?
(a) C02
(b)CaO
(c)Si02
(d)Sn02

Question 33:

Question 34:
In which of the following arrangements, the order is not according to the property indicated in brackets?
(a) Al3+ < Mg2+ < Na+ < F- (increasing atomic size)
(b) B < C < N < O (increasing first ionisation energy)
(c) I < Br < F < Cl (increasing electron gain enthalpy)
(d) Li < Na < K < Rb (increasing metallic radius)

Question 35:
Correct increasing order of atomic radius in Ca, Mg, P and Cl
(a) Mg < Ca < Cl < P
(b) Cl < P < Mg < Ca
(c) P < Cl < Ca < Mg
(d) Ca < Mg < P < Cl

Question 36:
The correct order of decreasing electronegativity values among the elements l-beryllium, ll-oxygen, Ill-nitrogen and IV-magnesium is
(a) II > III > I > IV
(b) III > IV > II > I
(c) I > II > III > IV
(d) II > III > IV > I

Question 37:
Direction (Q. NO. 38) In the following question, more than one of the answers may be correct. Select the correct answer and mark it according to the codes.
Codes
(a) 1,2 and 3 are correct
(b) 1 and 2 are correct
(c) 2 and 4 are correct
(d) 1 and 3 are correct

Question 38:

Question 39:

Direction (Q. Nos. 40-42) Each of these questions contains two statements : Assertion and Reason. Each of these questions also has four alternative choices, only one of which is the correct answer. You have to select one of the codes (a), (b), (c) and (d) given below.
(a) Assertion is true, Reason is true; Reason is a correct explanation for Assertion
(b) Assertion is true, Reason is true; Reason is not a correct explanation for Assertion
(c) Assertion is true, Reason is false
(d) Assertion is false, Reason is true

Question 40:
Assertion Electron gain enthalpy becomes less negative as we go down the group.
Reason Size of the atom increases on going down the group and the added electron would be farther from the nucleus.

Question 41:
Assertion Noble gases have large positive electron gain enthalpy.
Reason Electron has to enter the next higher principal quantum level.

Question 42:
Assertion Removal of s-electron is relatively difficult than removal of p-electron of the same main shell.
Reason s-electrons are closer to the nucleus than p-electrons of the same shell and hence, are more strongly attracted by nucleus.

Question 43:

Question 44:

Question 44:

Question 45:

Question 46:
Identify the wrong statement in the following.
(a) Amongst isoelectronic species, smaller the positive charge on the cation, smaller is the ionic radius
(b) Amongst isoelectronic species, greater the negative charge on the anion, larger is the ionic radius
(c) Atomic radius of the elements increases as we move down the first group of the periodic table
(d) Atomic radius of the elements decreases as we move across from left to right in the second period of the periodic table

Question 47:
In which of the following crystals of ionic compounds
would you expect maximum distance between the centres of cations and anions? [AFMC 2012]
(a) LiF
(b)CsF
(c)CsI
(d)Lil

Question 48:

Question 49:
The electronegativity of the following elements increases in the order
(a) C, N, Si. P
(b) N, Si, C, P
(c) Si, P, C, N
(d) P, Si, N, C

Question 50:
Which of the following has-the highest electron affinity?
(a) F-
(b)O-
(c) O
(d) Na

Question 51:
Highest electron affinity is shown by
(a) O-
(b)F-
(c)Cl₂
(d)F₂

Answers:

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