ACME ACADEMYWEEKLY EVALUATION TESTSubject: Science
Time Limit: 20 Mins
Max Marks: 20 Marks
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Student Name:
Roll Number:
Class / Sec:
Date:
GENERAL INSTRUCTIONS:
1.
Which metal exists as a liquid at room temperature?
[1 Mark]
2.
The ability of metals to be drawn into thin wires is known as:
[1 Mark]
3.
Which non-metal is a good conductor of electricity?
[1 Mark]
4.
Which of the following is an example of an amphoteric oxide?
[1 Mark]
5.
Aqua regia is a highly corrosive mixture of concentrated hydrochloric acid and concentrated nitric acid in what ratio?
[1 Mark]
6.
Which of the following metals is the most reactive according to the activity series?
[1 Mark]
7.
The process of heating sulphide ores strongly in the presence of excess air to convert them into oxides is called:
[1 Mark]
8.
Cinnabar (HgS) is an ore of which metal?
[1 Mark]
9.
The thermit reaction used to join cracked railway tracks involves iron(III) oxide and which metal powder?
[1 Mark]
10.
Galvanisation is a method of protecting steel and iron from rusting by coating them with a thin layer of:
[1 Mark]
11.
Bronze is an alloy of copper and which other metal?
[1 Mark]
12.
Which property is NOT generally associated with ionic compounds?
[1 Mark]
13.
Which metal reacts so violently with cold water that the evolved hydrogen immediately catches fire?
[1 Mark]
14.
Magnesium does not react with cold water. Which form of water does it react with?
[1 Mark]
15.
What are the essential conditions required for the rusting of iron?
[1 Mark]
16.
Metals placed high in the reactivity series (like sodium and aluminium) are extracted from their ores by:
[1 Mark]
17.
If one of the metals in an alloy is mercury, the alloy is specifically known as an:
[1 Mark]
18.
Which of the following metals does not react with oxygen even at very high temperatures?
[1 Mark]
19.
In the electrolytic refining of copper, what forms the 'anode mud'?
[1 Mark]
20.
What happens when an iron nail is placed in a copper sulphate solution?
[1 Mark]
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