NEET Chemistry Classification of Elements and Periodicity Questions Solved


the tenth element in the periodic table resembles:

(1)the second

(2)the fourth

(3)the fifth

(4)the eight

Concept Videos :-

Concept Questions :-

Modern Periodic Table

(1) it is a fact.

Difficulty Level:

  • 61%
  • 15%
  • 6%
  • 20%
Crack NEET with Online Course - Free Trial (Offer Valid Till September 19, 2019)

Which of the following order is not in accordance with the property stated against it ?

                                                                                                           

(a) F2 > Cl> Br2 > l2 Oxidising Power

(b) Hl > HBr >HCl >HF Acidic property in water

(c) F2 > Cl> Br2 > lElectronegativity

(d) F2 > Cl> Br2 > l2 Bond dissociation energy

Concept Videos :-

Concept Questions :-

Modern Periodic Table

SInce size increases down the period , thus bond dissociation energy decreases.

Difficulty Level:

  • 18%
  • 23%
  • 15%
  • 46%
Crack NEET with Online Course - Free Trial (Offer Valid Till September 19, 2019)

An element X occurs in short period having configuration ns2np1 . The formula and nature of its oxide are:

(a) XO3, basic

(b) XO3, acidic

(c) X2O3, amphoteric

(d) X2O3, basic

Concept Videos :-

Concept Questions :-

Nature of Compound

(c) B2O3, Al2O3 are amphoteric oxides

 

Newland's Octaves Law -

Arranged the element in increasing order of their atomic weight and found that every eighth element had properties similar to that of the first element. Law of Octave was found to be true upto calcium.

-

An element having configuration ns2 np1 will show +3 OS and its oxide nature will be that of its group i.e. Baron, Aluminium, etc.

therefore X2O3, and amphoteric nature.

 

Difficulty Level:

  • 14%
  • 20%
  • 55%
  • 13%
Crack NEET with Online Course - Free Trial (Offer Valid Till September 19, 2019)

The outermost electronic configuration of the most electronegative element is :

(a) ns2np3

(b) ns2np4

(c) ns2np5

(d) ns2np6

Concept Videos :-

Concept Questions :-

Modern Periodic Table

(c) It belongs to general outer electronic configuration of halogens which are most electronegative elements.

Difficulty Level:

  • 8%
  • 6%
  • 71%
  • 18%
Crack NEET with Online Course - Free Trial (Offer Valid Till September 19, 2019)

The elements X, Y, Z and J have the indicated electron configurations starting with the innermost shell. The most metallic element is :

(a) X = 2, 8, 3

(b) Y = 2, 8, 8

(c) Z = 2, 8, 8, 1

(d) j = 2, 8, 8, 7

Concept Videos :-

#22 | Atomic Radius

Concept Questions :-

(c) The metallic character is maximum in I gp. elements.

 

Difficulty Level:

  • 12%
  • 8%
  • 72%
  • 10%
Crack NEET with Online Course - Free Trial (Offer Valid Till September 19, 2019)

Which statement is true?

(1) the electronegative nature of elements increases along the period

(2) the electropositive nature of elements increases along the period

(3) the chemical reactivity of elements increases along the period

(4) the chemical reactivity of element decreases along the period

Concept Videos :-

#8 | Ionisation Enthalpy: Introduction
#9 | Calculation of Ionisation Enthalpy
#10 | Factors affecting Ionisation Enthalpy
#11 | Trends in Ionisation Enthalpy
#12 | Application of Ionisation Enthalpy
#13 | Solved Problems

Concept Questions :-

Ionization Energy (IE)

(1) it is a fact.

Difficulty Level:

  • 74%
  • 12%
  • 9%
  • 7%
Crack NEET with Online Course - Free Trial (Offer Valid Till September 19, 2019)

The most non-metallic element among the following is:

(a) Be

(b) B

(c) Mg

(d) Al

Concept Videos :-

Concept Questions :-

Modern Periodic Table

(b) Non-metallic character increases along the period and decreases down the gp.

 

Difficulty Level:

  • 16%
  • 62%
  • 8%
  • 16%
Crack NEET with Online Course - Free Trial (Offer Valid Till September 19, 2019)

58Ce is a member of:

(a) s-block elements

(b) p-block elements

(c) d-block elements

(d) f-block elements

Concept Videos :-

#1 | Electronic configuration of elements
#2 | Predicting Group & Block No. of Elements
#7 | Transition Elements

Concept Questions :-

Electronic Configuration

(d) Elements from atomic number 58 to 71 are f-block elements and are known as Lanthanoids or rare earths.

Difficulty Level:

  • 16%
  • 10%
  • 23%
  • 53%
Crack NEET with Online Course - Free Trial (Offer Valid Till September 19, 2019)

The screening effect of 'd' electrons is :

(a) much less than s-electrons

(b) much more than s-electrons

(c) equal to s-electrons

(d) equal to p-electrons

Concept Videos :-

#5 | Effective Nuclear Charge (Z Effective)
#6 | Application of Z Effective

Concept Questions :-

Screening Effect

(a) Screening effect order for sub-shell is of a shell, s>p>d>f.

Difficulty Level:

  • 68%
  • 25%
  • 4%
  • 4%
Crack NEET with Online Course - Free Trial (Offer Valid Till September 19, 2019)

Transuranic elements are those which are:

(a) of higher atomic number than uranium

(b) lighter than uranium

(c) of lower atomic number than uranium

(d) of same atomic number as uranium

Concept Videos :-

Concept Questions :-

Modern Periodic Table

(a) It is a fact.

Difficulty Level:

  • 75%
  • 9%
  • 10%
  • 9%
Crack NEET with Online Course - Free Trial (Offer Valid Till September 19, 2019)