Periodic Classification Quiz No:14

Question No:1

Some statements are given. Among them the correct statements are
a) IP2 of sodium is greater than that of Magnesium
b) IP2 of lithium is greater than IP1 of Helium
c) IP2 of sodium is greater than IP1 of Neon
d) IP1 of oxygen is greater than that of Nitrogen

[A] All are correct

[B] Only a, b and c are correct

[C] Only a,b are correct

[D] Only a, d are correct

Question No:2

Elements X, Y and Z have atomic numbers 19,37 and 55 respectively. Which of the following statements is true about them?

[A] Their ionization potential would increase with increasing atomic number

[B] ‘Y’ would have an ionization potential between those of X and Z

[C] Z would have the highest ionization potential

[D] Y would have the highest ionization potential

Question No:3

The statement that is false for the long form of the periodic table is

[A] It reflects the sequence of filling the electrons in the order of sub energy levels s,p,d and f

[B] It helps to predict the stable valency states of the element

[C] It reflects trends in physical and chemical properties of the elements

[D] It helps to predict the relative ionicity of the bond between any two elements

Question No:4

The compound of vanadium has magnetic moment of 1.73 BM. The vanadium chloride has the formula:

[A] VCl2

[B] VCl3

[C] VCl4

[D] VCl5

Question No:5

(IE)1 and (IE)2 of Mg(g) are 740,1540 kJ mol . Calculate percentage of Mg+(g) and Mg2+(g) if 1 g of Mg(g), absorbs 50.0 kJ of energy.

[A] %Mg+ = 50% %Mg+2 = 50%

[B] %Mg+ = 70.13% %Mg+2 = 29.87%

[C] %Mg+ = 75% %Mg+2 = 25%

[D] %Mg+ = 60% %Mg+2 = 40%

Question No:6

Question No:7

Use (IE) and (EA) listed below to determine whether the following process is endothermic exothermic.
Mg(g) + 2F(g)-+Mg2+(g)+2F(g)

(IE)1ofMg(g)=737.7kJmol
IE2of Mg(g) = 1451 kJ mol1————(EA) of F(g) = -328 kJ mol1

[A] Exo

[B] Endo

[C] both

[D] None

Question No:8

If Aufbau rule is not followed, K – 19 will be placed in the block

[A] s

[B] p

[C] d

[D] f

Question No:9

M(g) —- >M(g) + + e &Delta H = 100 eV
M(g) —- >M(g) 2+ + 2e &Delta H = 250eV

which is incorrect statement?

[A] I1 of M(g) is 100 eV

[B] I1 of M(g)+ is 150 eV

[C] I2 of M(g) is 250 eV

[D] I2 of M(g)is 150 eV

Question No:10

Which one of the following shows highest magnetic moment ?

[A] Fe2+

[B] Co2+

[C] Cr3+

[D] Ni2+

Question No:11

The ionic radii (in A0) of N3-, O2- and F are respectively

[A] 1.71, 1.36 and 1.40

[B] 1.36, 1.40 and 1.71

[C] 1.36, 1.71 and 1.40

[D] 1.71, 1.40 and 1.36

Question No:12

Match the following :
List –I ………….List – II
A) Rubedium I) Germanium
B) Platinum H) Radio active chalcogen
C) Ekasilicon ID) S-block element
D) Polonium IV) atomic number 78
ABCD

[A] IV,III,II,I

[B] III,IV,I,II

[C] II,I,IV,III

[D] IV,III,I,II

Question No:13

Screening constant depends upon

A) Number of inner shells

B) Number of electrons in inner shells

[A] A only

[B] B only

[C] Both A and B

[D] Neither A nor B

Question No:14

Screening constant of Be is 2.05 and that of B is

[A] 1.7

[B] 2.05

[C] 2.4

[D] 5

Question No:15

In a group from top to bottom effective atomic charge

[A] increases

[B] decreases

[C] constant

[D] cannot be predicted

Question No:16

Screening by inner electrons will be more effective in

[A] Mg-

[B] K

[C] Sr

[D] Cs

Question No:17

Correct order of first ionisation potentials

[A] K

Question No:18

In a period from left to right

A) nuclear charge increases

B) effective nuclear charge increases

C) atomic size decreases

D) Ionisation potential increases

Correct among the above statements are

[A] A, B

[B] B, C

[C] A, C, D

[D] A, B, C, D

Question No:19

Relation between oxidation numbers and electronegativity is given by

[A] Pauling’s scale

[B] Alfred scale

[C] Mulliken’sscale

[D] Slater’s scale

Question No:20

Screening effect influences

A) atomic radius

B) Ionisation enthalpy

C) electron gain enthalpy

[A] A, B

[B] B, C

[C] A, C

[D] A, B, C