Classification of element and periodicity in properties

1. In 1800 how many elements were known ?

A 31 B 35

C 53 D 30

2. Which group of elements indicate the doberenier triads ?

A Ca,Sr,Na B Li,Na,Ba

C Li,Na,K D Cl,Br,F

3. 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

4. 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

5. 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

6. 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

7. 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

8. 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

9. 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

10. Silicon and antimony belongs to group……….

A 14 &15 B 16 & 15

C 3 & 5 D 15 & 14

11. The first synthetic element is…..

A Tungsten B Zinc

C Technetium D Hydrogen

12. 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

13. IUPCC name of element with atomic number 115 will be

A UN uncardium B Ununqudium

C Unnilpentium D Ununpentium

14. General electronic configuration for 15 group element is

A ns2np3 B ns2np5

C ns2np6 D ns2np6

15. f-block elements are collectively called as

A Transition element B Inner transition element

C Mainn group element

16. Second group elements are called as

A None of these B Halogen

C Alkali metal D Alkaline earth metal

17. The outermost electronic configuration for iodine is

A [Kr]5s2 5p5 B [Xe]5s2 5p5

C [Kr]6s2 6p5 D [Kr] 4s2 4p5

18. 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

 

19. Which block of modern predic table have all types of element

i.e metal ,nonmetal & metalloids

A f B S

C d D P

20. 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

21. Element is called as Rouge element

A Hydrogen B Oxygen

C Lithium D Helium

22. 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

23. 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

24. Isoelectronic species have……..

A Number of neutron B Same number of electron

C None of these D Same number of proton

25. Which element have lowest ionization enthalpy?

A Xenon B Rubidium

C Iodine D Caesium

26. The most electronegative element is

A Nitrogen B Flourine

C Caesium D Chlorine

27. The atomic size down the group………… and Ionization enthalpy along the period…………….

A Decreases & decreases B Increases & increases

C Increases & decreases D Decreases & increases

28. 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

29. Which oxide is amphoteric in nature?

A Both Al2O3 and ZnO B Al2O3

C ZnO D None of these

30. Which Oxide of nitrogen is known as laughing gas?

A N2O B NO2

C N2O5 D NO

31. The compound formed by the combination of silicon and chlorine will be

A SiCl2 B SiCl5

C SiCl4 D SiCl3

32. 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

33. 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

34. Gennelly non metal oxides are..

A Amphoteric in nature B Neutral in nature

C Acidic in nature D Basic in nature

35. 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