List of top Chemistry Questions on Classification of elements and periodicity in properties

The organic halide, which does not undergo hydrolysis by SN1 mechanism is:

Option 1: C6H5CH2Cl

Option 2: CH2CH - CH2Cl

Option 3: (CH3)3C - Cl

Option 4: CH3 - CH = CH - Cl

Inert gases have positive electron gain enthalpy Its correct order is

Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R)
Assertion (A): The first ionization enthalpy of $3d$ series elements is more than that of group 2 metals
Reason (R): In $3d$ series of elements successive filling of d-orbitals takes place
In the light of the above statements, choose the correct answer from the options given below :

Which one of the following statements is incorrect?

It is observed that characteristic $X$-ray spectra of elements show regularity When frequency to the power " $n$ " ie $v^n$ of $X$-rays emitted is plotted against atomic number " $Z$ ", following graph is obtained

It is observed that characteristic $X$-ray spectra of elements show regularity When frequency to the power " $n$ " ie $v^n$ of $X$-rays emitted is plotted against atomic number " $Z$ ", following graph is obtained
It is observed that characteristic X-ray spectra of elements show regularity. When frequency to the power " n " i.e. vn of X-rays emitted is plotted against atomic number " Z ", following graph is obtained.
The first ionization enthalpies of $Be , B , N$ and $O$ follow the order

For electron gain enthalpies of the elements denoted as\(\Delta_{ eg } H\), the incorrect option is :

The correct increasing order of the ionic radii is

Graph of X-ray frequency (v)n v/s atomic number (Z) is linear. Find the value of n.

In which of the following pairs of elements electron gain enthalpy difference is highest?

Which of the following elements is most reactive?
Select the correct order of electronegativity of the elements: B, C, At, S
Correct order of first ionization energy of Li, Be, C, B, N, O, F
The increasing order of metallic character
Match List l with List ll.
List I Coordination Complex List II Number of unpaired electrons
(I) [Cr(CN)6]3- (a) 0
(II) [Fe(H2O)6]2+ (b) 3
(III) [Co(NH3)6]3+ (c) 2
(IV) [Ni(NH3)6]2+ (d) 4
Choose the correct answer from the options given below:
Given below are two statements: One is labelled as Assertion A and the other is labelled as Reason R
Assertion A : Sodium is about 30 times as abundant as potassium in the oceans.
Reason R : Potassium is bigger in size than sodium.
In the light of the above statements, choose the correct answer from the options given below
The descending order of acidity for the following carboxylic acid is-
A. CH3COOH
B. F3C-COOH
C. CICH2-COOH
D. FCH2-COOH
E. BrCH2-COOH
Choose the correct answer from the options given below:
Which of the following statements are correct?
(A) The M3+/M2+ reduction potential for iron is greater than manganese 
(B) The higher oxidation states of first row dblock elements get stabilized by oxide ion. 
(C) Aqueous solution of Cr2+ can liberate hydrogen from dilute acid. 
(D) Magnetic moment of V2+ is observed between 4.4-5.2 BM Choose the correct answer from the options given below: 
Ferric chloride is applied to stop bleeding because-
The correct order of metallic character is:
Given below are two statements: one is labelled as Assertion A and the other is labelled as Reason R:
Assertion A: The energy required to form \(Mg^{2+}\) from Mg is much higher than that required to produce \(Mg^+\)
Reason R: \(Mg^{2+}\) is small ion and carry more charge than \(Mg^{+}\).
In the light of the above statements, choose the correct answer from the options given below.
Decreasing order of reactivity towards electrophilie substitution for the following compounds is
Decreasing order of reactivity towards electrophilie
Explain the following: (i) Why is the atomic size of noble gases comparatively larger?
(ii) Being almost equal in electronegativity, Nitrogen forms hydrogen bond while chlorine does not.
How many elements are there in period 4 of the periodic table?