Classification of element and periodicity in properties
In 1800 how many elements were known ?
A 31 B 35
C 53 D 30
Which group of elements indicate the doberenier triads ?
A Ca,Sr,Na B Li,Na,Ba
C Li,Na,K D Cl,Br,F
Which Medal is given by the royal society of London to newlands in 1887 ?
A Calicum Medal B Nobel Medel
C None of these D Davy Medal
What Indicates eka-Aluminium and
eka-Silicon (Note eka means next)
A Germanium and Gallium B Silicon and Phosphorus
C Boron and Carbon D Gallium and Germanium
Who discuss the properties of elements by plotting a graph between frequency of X-Ray and atomic number of each element
A Henry Moseley B Mendeleev
C Bohr D Doberenier
According Modern periodic law the chemical and physical property of the elements are the periodic function of……………….
A None B Atomic Number
C Atomic mass D Gram Atomic mass
According to mendeleev the horizontal rows are called as…………… and vertical columns are called as………………….
A Period and Group B Group and Period
C Series and Group D Group and Series
IUPAC indicates ……
A International union of pure and applied chemical industry B International union of pure and applied
C National union of pure chemistry D International union of pure and applied chemistry
The magic number indicates……..
A 2 8 8 18 18 32 B 2 6 8 18 32 32
C 2 8 8 18 32 32 D 32 18 18 8 8 2
Silicon and antimony belongs to group……….
A 14 &15 B 16 & 15
C 3 & 5 D 15 & 14
The first synthetic element is…..
A Tungsten B Zinc
C Technetium D Hydrogen
Which elements discovery was credit by both American and Soviet scientist
A Element have atomic number 103 B Dubnium
C None D Element have atomic number 104 and
IUPAC official name is ratherfordium
IUPCC name of element with atomic number 115 will be
A UN uncardium B Ununqudium
C Unnilpentium D Ununpentium
General electronic configuration for 15 group element is
A ns2np3 B ns2np5
C ns2np6 D ns2np6
f-block elements are collectively called as
A Transition element B Inner transition element
C Mainn group element
Second group elements are called as
A None of these B Halogen
C Alkali metal D Alkaline earth metal
The outermost electronic configuration for iodine is
A [Kr]5s2 5p5 B [Xe]5s2 5p5
C [Kr]6s2 6p5 D [Kr] 4s2 4p5
The atomic number of rubidium Indium, Gallium, xenon and antimony will be
A 37,49,31,54,51 B 51,54,49,37,19
C 49,37,31,54,51 D 51,54,32,49,37
Which block of modern predic table have all types of element i.e metal ,nonmetal & metalloids
A f B S
C d D P
Helium is not a p block element because
A It’s last electron enter into s orbital B It belongs to 18 group elements
C None of these D It does not have p orbitals
Element is called as Rouge element
A Hydrogen B Oxygen
C Lithium D Helium
16 group elements are called as calchogens because….
A they have Oxygen and sulphur B Most of the minerals are found in the form their oxides or sulphide
C they are found on earth crust D Because they are minerals
The fluorine have less negative value of electron gain enthalpy than chlorine because
A fluorine have inter electronic repulsion due to small size B fluorine have large size than chlorine
C Chlorine have vacant d orbitals D chlorine have greater inter electronic repulsion than fluorine
Isoelectronic species have……..
A Number of neutron B Same number of electron
C None of these D Same number of proton
Which element have lowest ionization enthalpy?
A Xenon B Rubidium
C Iodine D Caesium
The most electronegative element is
A Nitrogen B Flourine
C Caesium D Chlorine
The atomic size down the group………… and Ionization enthalpy along the period…………….
A Decreases & decreases B Increases & increases
C Increases & decreases D Decreases & increases
17th Group elements have most negative value of electron gain enthalpy because
A Fluorine is most electronegative B
They have ns2 np5 electronic
configuration due to which they need only
one electron to acquire noble gas
configuration
C they have 7 electron in their outermost
shell D They are called as halogens
Which oxide is amphoteric in nature?
A Both Al2O3 and ZnO B Al2O3
C ZnO D None of these
Which Oxide of nitrogen is known as laughing gas?
A N2O B NO2
C N2O5 D NO
The compound formed by the combination of silicon and chlorine will be
A SiCl2 B SiCl5
C SiCl4 D SiCl3
The common option state of 18 group element will be…..
A 3 and 5 B Zero and eight
C One And seven D 2 and 6
PCl5 is possible but not NCl5 because…
A None of these B Because Phosphorus have vacant d orbital
C Because nitrogen have vacant d orbitals D Because chlorine do not have vacant d
orbital
Gennelly non metal oxides are..
A Amphoteric in nature B Neutral in nature
C Acidic in nature D Basic in nature
18 group elements have highest ionization enthalpy because
A They are inert B They have d orbitals
C They have stable electronic configuration D None of these
