MCQ 11 Mark
Since metals produce ringing sounds, they are said to be $............$
- ASound metal
- ✓Sonorous
- CRing metal
- Dmalleable
Answer
View full question & answer→Correct option: B.
Sonorous
50 questions · timed · auto-graded
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$(P)$
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$(Q)$
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$(R)$
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False
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True
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False
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$(P)$
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$(Q)$
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$(R)$
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True
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False
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True
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$(P)$
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$(Q)$
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$(R)$
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False
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True
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True
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$(P)$
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$(Q)$
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$(R)$
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True
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False
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False
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$(P)$
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$(Q)$
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$(R)$
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False
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True
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True
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Non-metals can be cut easily. Non-metals have usually low melting point and low boiling points. Here, only option $[a]$ is correct, as solid non-metals are usually neither hard not strong.
The descending order of reactivity of metals is as follows: $Na > Ca > Mg > Al > Zn > Fe > Sn >P$ $b[H]Cu > Hg > Ag > Au > Pt$ By using this, we can say that in the given options, only $Na > Fe > Cu$ is the correct order.
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Column I
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Column II
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$(A)$
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A non-metal, essential for respiration
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$(i)$
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Graphite
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$(B)$
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A non-metal, the source of energy in Sun
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$(ii)$
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Silicon
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$(C)$
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A non-metal, good conductor of electricity
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$(iii)$
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Oxygen
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$(D)$
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A non-metal, used in semiconductors
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$(iv)$
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Hydrogen
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Most of the metals react with oxygen to form metal oxides. For example: magnesium reacts with oxygen to form magnesium oxide. The reaction involved is: $2Mg(s) + O2(g) \rightarrow 2MgO(s)$ The metal oxide form alkali solution when dissolved in water. This solution turns red litmus paper to blue. Hence, these metal oxides are basic in nature.