GENERAL INSTRUCTIONS (Please read the following instructions very carefully)
1. Question marks are mentioned with each Question.
2. Please write neat and clean hand-writing on Answer Sheet. Use Margin on right side and left side of Answer Sheet.
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4. Do not click the button Submit Test before completing the paper on Answer Sheet.
5. This is a ONE TIME attempt test. Once started, it cannot be reversed or attempted again.
6. Take photo of all the Sheets and make single pdf file.
1
Which of the following metals have such a low melting point that they melt even when kept on the palm?
Tungsten and Nickel
Copper and chromium
Gallium and Cesium
Aluminium and Magnesium
2
Brass is formed by the combination of Copper and _________________.
Zinc
Iron
Silver
Aluminium
3
Which of the following metals is never found in nature as a free element ?
Plantinum
Copper
Calcium
Bismuth
4
Steel is formed by the combination of Iron and ____________________.
Hydrogen
Carbon
Nitrogen
Oxygen
5
Ionic compond are _______ in organic solvent
Soluble
Insoluble
Partially soluble
None of these
6
Eating away of metal by water, oxygen and other chemicals is called _______________
Carbonisation
Amalganation
Oxidation
Corrosion
7
Those minerals from which the metals can be extracted conveniently profitably are called _________
Element
Ore
Compound
Mixture
8
Corrosion of metal can be prevented when contact between metal and supply of _____________ is cut off.
9
This metal's latin name is "Ferrum" and it is a magnetic, malleable and silvery-white metal. It was used to make ornaments and weapons. When exposed to moist air, it oxidises to from rust. Identify the metal.
Chromium
Steel
Potassium
10
22-carat gold is a mixture of _________________
Au and Cu
Zn and Au
Al and Au
Mg and Au
11
Aluminimum is extracted from its bauxite ore by ____________________
Thermal reaction
Chemical reaction
Electrolytic reduction
12
Which of the following are correct :
(a) Metals like Potassium, Sodium, Calcium,etc. are highly reactive.
(b) The process of extracting metals from their ores and refining them for use is known as metallurgy.
Only (a) is correct.
Only (b) is correct.
Both (a) and (b) are correct.
None of these.
13
Aluminium is extracted from bauxite which is a/an ______________
Oxide ore
Carbonate ore
Halide ore
Sulphide ore
14
(a) The extraction of a metal from its ore depends upon the reactivity of the metals.
(c) The process of obtaining a metal from its ores is called metallurgy of the metal.
Only (a) and (b) are correct.
Only (b) and (c) are correct.
Only (a) and (c) are correct.
All of these.
15
Which of the following is a carbonate ore of copper?
Cuprite
Pyrite
Copper glance
Malachite