SAT - Science - Chemistry - Periodic Classification of Elements

Question - 1

Atomic numbers of elements A, B, C, and D are 19, 17, 36 and 27 respectively. The element which is a noble gas is

  • A A
  • B B
  • C C
  • D D

Question - 2

The element with atomic number 9 has the same chemical properties with the element having same atomic number.

  • A 11
  • B 17
  • C 35
  • D both B and C

Question - 3

Atomic number of an element X is 18. To which period and group X belongs?

  • A 2nd and 18th
  • B 3rd and 18th
  • C 2nd and zero group
  • D 4th and zero group

Question - 4

Which of the following is a noble gas?

  • A Radon
  • B Radium
  • C Plutonium
  • D Rhodium

Question - 5

An element X has 6 electrons in M shell which is the valence shell. Identify the wrong statement about the element X.

  • A It belongs to 3rd period of modern periodic table
  • B Its group number is 16
  • C It has 2 valence electrons
  • D It oxides when dissolved in water form acids.

Question - 6

Dipositiveion of the element P has 8 electrons in its L shell.What is the atomic number of the element P?

  • A 10
  • B 12
  • C 6
  • D 11

Question - 7

The electronic configuration of an element Ais 2, 8, 2 and that of Bis 2, 8, 7. Which of the following statements are correct about A and B?
I. B is a metal and A is a non-metal
II. If A reacts with B, the formula of the compound formed is AB
III. If A reacts with B, the formula of the compound is ABz
IV. A, is a reducing agent whereas Bis an oxidising agent

  • A I and II
  • B II and IV
  • C llI and IV
  • D All of these

Question - 8

The number of elements in 3rd and 4th period respectively are

  • A 8 and 18
  • B 8 and 8
  • C 8 and 32
  • D 18 and 18

Question - 9

Match the following:

List-I List-II
a. Potassium 1. Highly electro-negative
b. Fluorine 2. 8 electrons in the valence shell
c. Xenon 3. Alkali metal
d. Francium 4. Radio active
  • A A B C D 3 1 2 4
  • B A B C D 3 1 4 2
  • C A B C D 3 4 1 2
  • D A B C D 1 3 2 4

Question - 10

An element X which belongs to the left side of periodic table combines with oxygen to form an oxide with the formula X2O. Which of the following statements are true?
i. X has higher ionisation enthalphy than oxygen
ii. X20 is an acidic oxide.
iii. Aqueous solution of X20 changes red litmus to blue.
iv. X is an alkali metal

  • A i and iii
  • B i and iv
  • C iii and iv
  • D iii only
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