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
