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 |
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.
Identify the correct order of reactivity.
Choices
Choice (4) | Response | |
---|---|---|
a. | ||
b. | ||
c. | ||
d. |
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.
Metal | ||||
K | No reaction | Displacement | No reaction | No reaction |
L | Displacement | No reaction | No reaction | No reaction |
M | No reaction | No reaction | No reaction | Displacement |
N | No reaction | No reaction | No reaction | No 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. |