Match the following columns. Column I Column II (i) An isotope of hydrogen (a) Aluminium (ii) Less reactive metal than hydrogen (b) Potassium (iii) Form amphoteric oxides (c) Tritium (iv) Form alkali (d) Platinum

(i)- (c) Hydrogen has three isotopes Tritium is one of the isotopes of hydrogen which is radioactive in nature. (ii)- (d) Platinum is a less reactive metal than hydrogen as it lies below hydrogen in the reactivity series. Hydrogen can easily react with air and water. On the other hand, platinum never reacts with air or water. (iii)- (a) Aluminium is a weak metal so its oxide is amphoteric. Amphoteric oxides are those oxides which reacts with acids as well as bases to form respective salt and hydrogen gas or water respectively. (iv)- (b) Potassium is one of the strongest metal and it is highly reactive. So, metal oxide is basic strongly and its aqueus solution is also a strong base.

E M B I B E

All In One ICSE Chemistry>Chapter 6 - Study of First Element-Hydrogen>EXAM PRACTICE>Q 18

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Solubility of hydrogen in water is

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Important Questions on Study of First Element-Hydrogen

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All In One ICSE Chemistry>Chapter 6 - Study of First Element-Hydrogen>EXAM PRACTICE>Q 19

Which of the statement about the reaction below is incorrect?

$2 PbO (s) + C (s) \to 2 Pb (s) + {CO}_{2} (g)$

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All In One ICSE Chemistry>Chapter 6 - Study of First Element-Hydrogen>EXAM PRACTICE>Q 20

Match the following columns.

Column I	Column II
(i) An isotope of hydrogen	(a) Aluminium
(ii) Less reactive metal than hydrogen	(b) Potassium
(iii) Form amphoteric oxides	(c) Tritium
(iv) Form alkali	(d) Platinum