Metals and Non-Metals [NSO Level 2- Science Olympiad (SOF) Class 8]: Questions 1 - 3 of 11

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Question 1

Appeared in Year: 2013

Question Assertion-Reason▾

Assertion(Ꭺ)

when the metals react with oxygen which results, the red litmus changes into blue.

Reason(Ꭱ)

The metallic oxides are generally basic in nature.

Choices

Choice (4)Response

a.

Both Ꭺ and Ꭱ are true and Ꭱ is the correct explanation of Ꭺ

b.

Ꭺ is true but Ꭱ is false

c.

Both Ꭺ and Ꭱ are true but Ꭱ is NOT the correct explanation of Ꭺ

d.

Ꭺ is false but Ꭱ is true

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Question 2

Appeared in Year: 2014

Question MCQ▾

A student performed various experiments to investigate about the reactivity of four unknown elements, P, Q, R, X and Y. Metals P and R can react with dilute acids to produce hydrogen gas while X cannot.

Figure About Reactivity of 4 Unknown Elements

Identify the correct order of reactivity.

Choices

Choice (4)Response

a.

b.

c.

d.

Edit

Question 3

Appeared in Year: 2017

Question MCQ▾

Four metals K, L, M and N are added to the following solutions one by one. The observations made are as follows.

Table Shows Solution of Four Metals K, L, M and N
Metal
KNo reactionDisplacementNo reactionNo reaction
LDisplacementNo reactionNo reactionNo reaction
MNo reactionNo reactionNo reactionDisplacement
NNo reactionNo reactionNo reactionNo reaction

Which of the given solutions can be easily stored in a container made up of any of these metals?

Choices

Choice (4)Response

a.

b.

c.

d.

Edit