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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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 is used to manufacture sulphuric acid?
Sulphur
Silicon
Nickel
Caesium
2
Which of the following gas is used by Human beings and animals for breathing ?
Hydrogen
Oxygen
Nitrogen
Neon
3
Metals can be arranged in the order of ___________________ reactivity in a series.
Increasing
Decreasing
Ascending
None of these.
4
Which of the following is least reactive metal in each of the following ?
Gold
Sodium
Calcium
Magnesium
5
Brass is formed by the combination of Copper and _________________.
Zinc
Iron
Silver
Aluminium
6
Which of the following is used as a protective coating for iron?
All of these.
7
Metals react with _________________ and produce a metal oxide and hydrogen gas.
Water
Acid
Base
8
Metal oxides that are soluble in water dissolve in it to further form ______________________.
Metal hydroxide
Metal oxide.
Metal monoxide.
9
The reaction of Sodium and potassium with cold water is violent and _________________.
Exothermic
Endothermic
Both (a) and (b) are correct.
10
Which of the following are correct :
(a) Metals react with water and produce a metal oxide and hydrogen gas
(b) Metals react with water and produce a metal oxide and oxygen gas
Only (a) is correct.
Only (b) is correct.
11
Iron is shiny gray initially but after some time forms the layer of hydrated Iron (III) oxide in the presence of _____________________
Water vapours and carbon dioxide
Water vapours and oxygen
Carbon dioxide and oxygen
Oxygen and hydrogen
12
(a) Iron is used for making automobiles, machinery, pipes, containers, nails, etc.
(b) Zinc is mainly used as a protective coating for iron.
13
(a) Potassium is the highly reactive metal.
(b) Gold is the least reactive metal.
14
(a) Silver is mainly used as a protective coating for iron.
(c) Aluminium is used as foils used for wrapping chocolates etc
Only (a) and (b) are correct.
Only (b) and (c) are correct.
Only (a) and (c) are correct.
15
(a) The metals that can lose electrons easily and form positively charged ions are more reactive.
(b) The metals that do not lose electrons easily are less reactive.
(c) The metals that do not lose electrons easily are more reactive.