2nd Year Chemistry S-Block Elements
MCQs Chapter No. 2
Question No. 2 Fill in the Blanks.
(i) Alkali metals are ____________ reactive than alkaline-earth metals.
Answer:
More
(ii) Alkali metals decompose water vigorously producing ______ and hydrogen.
Answer:
Hydroxide
(iii) When heated in a current of dry hydrogen, alkaline earth metals form white crystalline _________ of the type MH2.
Answer:
Hydrides
(iv) The beryllium hydroxide, like the hydroxide of aluminum is amphoteric, while the hydroxides of the other members of the group IIA are_________.
Answer:
Basic
(v) The elements of the group IA are termed as alkali metals, because their are alkaline____________.
Answer:
Hydroxides , Oxides
(vi) Spodumene is an ore of______________metal.
Answer:
Lithium
(vii) Alkali metal nitrates on heating give the corresponding____________and oxygen (except Li).
Answer:
Nitrite
(viii) Na2CO3, H2O is the chemical formula of a mineral of sodium which is known as __________.
Answer:
Natron
(ix) Metallic bicarbonates are decomposed on heating into their carbonates, alongwith ____________and ______________.
Answer:
CO2,H2O
(x) Metal nitrates other than the alkali metals on heating decompose into the corresponding metal ___________ alongwith the evolution of nitrogen peroxide and oxygen.
Answer:
Oxides
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