EASY
9th ICSE
IMPORTANT
Earn 100

Give the laboratory preparation of hydrogen gas.

Important Questions on Study of First Element-Hydrogen

EASY
9th ICSE
IMPORTANT
Write the use of oxy-hydrogen torch.
MEDIUM
9th ICSE
IMPORTANT
Hydrogen literally means _____ producer. (water/ oxygen/ carbon dioxide)
MEDIUM
9th ICSE
IMPORTANT
Heavy water is made up of _____ isotope of hydrogen. (protium / deuterium)
MEDIUM
9th ICSE
IMPORTANT
_____ is the least reactive metal.
EASY
9th ICSE
IMPORTANT
Zinc metal form oxides having both acidic and _____ nature.
MEDIUM
9th ICSE
IMPORTANT

CuCl+CO+2H2O_____

(A) CuCl.CO.2H2O                    (B) CuCl2                     (C) CuO

Enter your correct answer as A, B or C.

MEDIUM
9th ICSE
IMPORTANT
Carbon dioxide present as impurities in hydrogen gas is removed using _____ solution.(NaOH/NaCl)
MEDIUM
9th ICSE
IMPORTANT
Hydrogen along with _____ is used in flame for welding metals. (oxygen/ nitrogen/ carbon dioxide)