Chemistry: Periodic Classification Of Elements! Test

10 Questions | By Padasalai10S | Updated: Mar 22, 2022 | Attempts: 1888

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Chemistry: Periodic Classification Of Elements! Test - Quiz

Questions and Answers

1.

In the modern periodic table periods and groups are given. Periods and groups indicate ––––––
- A.
  
  Rows and Columns
- B.
  
  Columns and rows
2.

Third period contains 8 elements, out of these elements how many elements are non-metals?
- A.
  
  4
- B.
  
  5
- C.
  
  6
- D.
  
  7
3.

An element which is an essential constituent of all organic compounds belongs to _________ group.
- A.
  
  14 th group
- B.
  
  15 th group
4.

Ore is used for the extraction of metals profitably. Bauxite is used to extract aluminium, it can be termed as ________
- A.
  
  Ore
- B.
  
  Mineral
5.

Gold does not occur in the combined form. It does not react with air (or) water. It is in ______
- A.
  
  Native state
- B.
  
  Combined state
6.

Assertion: Greenish layer appears on copper vessels if left uncleaned. Reason: It is due to the formation of layer of basic copper carbonate Give your correct option.
- A.
  
  Assertion and reason are correct and relevant to each other
- B.
  
  Assertion is true but reason is not relevant to the assertion
7.

A process employed for the concentration of sulphide ore is __________
- A.
  
  Froth floatation
- B.
  
  Gravity separation
8.

Coating the surface of iron with other metal prevents it from rusting. If it is coated with thin layer of zinc it is called _________
- A.
  
  Galvanization
- B.
  
  Painting
- C.
  
  Cathodic protection
9.

Any metal mixed with mercury is called amalgam. The amalgam used for dental filling is _________
- A.
  
  Ag – Sn amalgam
- B.
  
  Cu – Sn amalgam
10.

Assertion: In thermite welding, aluminium powder and Fe₂O₃are fused. Reason: Aluminium powder is a strong reducing agent. Does the reason satisfy the assertion?
- A.
  
  No
- B.
  
  Yes