General Principles And Processes Of Isolation Of Elementsy Test

General Principles And Processes Of Isolation Of Elementsy

This is general principles and processes of isolation of elementsy Test-01 for CBSE class 12 Chemistry.. There are 15 questions in this test with each question having around four answer choices.

Questions & Answers

1
Metals which occur in native state in nature
  • A
    Do not form compounds
  • B
    Are very reactive
  • C
    Are not very reactive
    Correct
  • D
    Have low density
2
Metal which is found in free state is
  • A
    Iron
  • B
    Zinc
  • C
    Gold
    Correct
  • D
    Copper
3
Which among the following statement is correct?
  • A
    all minerals are ore
  • B
    a mineral cannot be an ore
  • C
    metals are extracted from mineral
  • D
    all ores are minerals
    Correct
4
Which is the most abundant metal on earth?
  • A
    Aluminium
    Correct
  • B
    Copper
  • C
    Zinc
  • D
    Gold
5
The impurities associated with ore is known as
  • A
    gangue
    Correct
  • B
    slag
  • C
    froath
  • D
    flux
6
The common impurity present in most of the ores is
  • A
    $SnO_2$
  • B
    $SiO_2$
    Correct
  • C
    ZnS
  • D
    PbS
7
Which metal is also found in sea beds ?
  • A
    Manganese
    Correct
  • B
    Aluminium
  • C
    Magnesium
  • D
    Calcium
8
The sulphide ore of iron is
  • A
    iron pyrite
    Correct
  • B
    haematite
  • C
    cryolite
  • D
    magnetite
9
Carbonate ore of iron is
  • A
    calamine
  • B
    siderite
    Correct
  • C
    Carnalite
  • D
    Galena
10
The process of separating gangue and other impurities from the metals is known as
  • A
    levigation
  • B
    calcinations
  • C
    magnetic separation
  • D
    benefaction of ore
    Correct
11
Which technique utilizes the density difference between the ore and the impurity to concentrate the ore is
  • A
    Magnetic separation
  • B
    Froth floatation
  • C
    Levigation
    Correct
  • D
    Leaching
12
Gravity separation technique is mainly applicable to
  • A
    Oxide ore
    Correct
  • B
    Sulphide ore
  • C
    Carbonate ore
  • D
    Halide ore
13
The diagram shows schematic representation of
Question 13 figure 1
  • A
    Magnetic separation
  • B
    Froth floatation
  • C
    Leaching
  • D
    Gravity separation
    Correct
14
Which process is usually applied for separating gangue from sulphide ores?
  • A
    Magnetic separation
  • B
    Gravity separation
  • C
    Leaching
  • D
    Froth floatation
    Correct
15
The impurity that is added externally to remove the impurity already present in the ore is known as
  • A
    Gangue
  • B
    Matrix
  • C
    Flux
    Correct
  • D
    Slag