Question No:1
Assertion (A): Size decreases in the order Pb > Pb2+ > Pb4+
Reason (R): The force of attraction towards nucleus increases
[A] Both A and R are true and R is the correct explanation
[B] Both A and R are true but R is not the correct explanation of A
[C] A is true but R is false
[D] A is false but R is true
Question No:2
Assertion (A): Ionization enthalpy is always negative.
Reason (R): Energy is always released when electrons are removed
[A] Both A and R are true and R is the correct explanation
[B] Both A and R are true but R is not the correct explanation of A
[C] A is true but R is false
[D] A is false but R is true
Question No:3
Assertion (A): The first ionisation energy of B is less than that of Be
Reason (R) : The penetration ability of s- electrons is higher than that of p- electrons
[A] Both A and R are true and R is the correct explanation
[B] Both A and R are true but R is not the correct explanation of A
[C] A is true but R is false
[D] A is false but R is true
Question No:4
Assertion (A): The second ionisation energy of ‘O’ is greater than that of second ionisation energy of ‘N’
Reason (R): The half filled p-orbitals cause greater stability for an atom.
[A] Both A and R are true and R is the correct explanation
[B] Both A and R are true but R is not the correct explanation of A
[C] A is true but R is false
[D] A is false but R is true
Question No:5
Assertion (A): The second electron affinity of oxygen is exothermic.
Reason (R): Oxygen is the highest electronegative element
[A] Both A and R are true and R is the correct explanation
[B] Both A and R are true but R is not the correct explanation of A
[C] A is true but R is false
[D] A is false but R is true
Question No:6
Assertion (A) : Zn is a transition element.
Reason (R): Elements without incompletely filled d-orbital are called transition elements
[A] Both A and R are true and R is the correct explanation
[B] Both A and R are true but R is not the correct explanation of A
[C] A is true but R is false
[D] A is false but R is true
Question No:7
Modern periodic table is constructed based on
[A] Atomic number
[B] Mass number
[C] Atomic weight
[D] Oxidation number
Question No:8
What is the name of 118 element
[A] Oganesson
[B] Nihonium
[C] Moscovium
[D] Tennessine .
Question No:9
The period that contains only gaseous elements is
[A] 1
[B] 2
[C] 3
[D] 4
Question No:10
The element which belong to 3rd period and IVA group of periodic table is
[A] Silicon
[B] Carbon
[C] Germanium
[D] Tin
Question No:11
Pair of elements with the following atomic numbers have the same chemical properties
[A] 13 & 22
[B] 3&11
[C] 4&24
[D] 2 & 1
Question No:12
The sub-shells filled one by one for 4th period elements are
[A] 3d, 4sand4p
[B] 4s, 4p and 4d
[C] 4s, 3d and 4p
[D] 3d, 4p and 4s
Question No:13
The starting element and last element in the largest period in modern periodic table are
[A] Rb and Xe
[B] Cs and I
[C] Cs and Rn
[D] Fr and Kr
Question No:14
Which of the following has both members from the same period of the periodic table
[A] Na, F
[B] Mg, Ca
[C] Na, Cl
[D] Be, Al
Question No:15
Atomic number of nitrogen is 7. The atomic number of the third member in the same family is
[A] 23
[B] 15
[C] 33
[D] 51
Question No:16
Element with atomic number 38, belongs to
[A] II A group and 5th period
[B] II A group and 2nd period
[C] V A group and 2nd period
[D] III A group and 5th period
Question No:17
Set of elements with the following atomic numbers belong to the same group
[A] 9, 16, 35, 3
[B] 12, 20, 4, 38
[C] 11, 19, 27, 5
[D] 24, 47, 42, 55
Question No:18
Which of the following pairs has both members from the same group of the periodic table?
[A] Mg-Ba
[B] Mg-Na
[C] Mg-Cu
[D] Mg-Cl
Question No:19
The elements with atomic number 10,18,36,54 and 86 are all
[A] Light metals
[B] Inert gases
[C] Halogens
[D] Rare earths
Question No:20
Which of the following pairs has elements containing same number of electrons in the outermost orbit
[A] N,O
[B] Na, Cl
[C] Ca, Cl
[D] Cl, Br