Subject :NSO Class : Class 8
Fill in the blanks with the most appropriate option.
‘W’ is a very reactive metal, reacts vigorously with
oxygen and water therefore, stored in (1) . ‘X’ is
a non-metal, soft and dull and, forms (2) oxides
with oxygen. ‘Y’ is very reactive (3) , catches
fire if exposed to air, therefore, stored in water.
‘Z’ does not react with dilute hydrochloric acid even
on heating but it reacts with sulphuric acid. When it
is exposed to moist air for long, it acquires a dull
(4) coating.
A1-Water, 2-Basic, 3-Metal, 4-Reddish
brown
B1-Kerosene, 2-Acidic, 3-Metal, 4-Red
C1-Kerosene, 2-Acidic, 3-Non-metal, 4-Green
D1-Water, 2-Basic, 3-Non-metal, 4-Green
copper does not react with sulphuric acid