Core Science Chemistry>Chapter 3 - Metals And Non-Metals>EXERCISE 3C>Q 3

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10th CBSE

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Although metals form basic oxides, which of the following metals form an amphoteric oxide?

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Important Questions on Metals And Non-Metals

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Core Science Chemistry>Chapter 3 - Metals And Non-Metals>EXERCISE 3C>Q 4

Which of the following metals are obtained by the electrolysis of their chlorides in the molten state?

(i)

Na

(ii)

Ca

(iii)

Fe

(iv)

Cu

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10th CBSE

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Core Science Chemistry>Chapter 3 - Metals And Non-Metals>EXERCISE 3C>Q 5

2 mL each of concentrated

HCI, {HNO}_{3}

and a mixture of concentrated

HCI

and concentrated

{HNO}_{3}

in the ratio of 3 : 1 were taken in test tubes labelled as A, B and C. A small piece of metal was put in each test tube. No change occurred in test tubes A and B but the metal got dissolved in test tube C respectively. The metal could be

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Core Science Chemistry>Chapter 3 - Metals And Non-Metals>EXERCISE 3C>Q 1

Why is aluminium called a self-protecting metal?

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Core Science Chemistry>Chapter 3 - Metals And Non-Metals>EXERCISE 3C>Q 2

In nature, metal A is found in the free state, while metal B is found in the form of its compounds. Which of these two metals will be near the top of the reactivity series?

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Core Science Chemistry>Chapter 3 - Metals And Non-Metals>EXERCISE 3C>Q 3

Which one of the metals in the following group are (a) most reactive (b) least reactive
Au, Na, Cu, Ca?

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Core Science Chemistry>Chapter 3 - Metals And Non-Metals>EXERCISE 3C>Q 4

When an iron knife is kept dipped in blue copper sulphate solution, the solution changes to light green. Why?

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