The constituents of baking powder that makes the dough to rise is
NaHCO3
NaOH
Na2CO3
NaCl
Correct answer is A
No explanation has been provided for this answer.
Bronze is preferred to copper in the making of medals because it
is stronger
can withstand low temperature
is lighter
has low tensile strength
Correct answer is A
No explanation has been provided for this answer.
The property of concentrated H2SO4 that makes it suitable for preparing HNO3 is its
boiling point
density
oxidizing properties
dehydrating properties
Correct answer is A
\(H_2SO_4\) acid has a high boiling point of 388°C. Due to its high boiling point, it is considered a non-volatile acid, so when sulphuric acid is reacted with salts of nitric acid eg \(NaNO_3\), \(HNO_3\) is displaced from its salt
In the laboratory preparation of oxygen, dried oxygen is usually collected over
hydrochloric acid
mercury
calcium chloride
tetraoxosulphate (VI) acid
Correct answer is B
No explanation has been provided for this answer.
The bleaching action of chlorine gas is effective due to the presence of
hydrogen chloride
water
air
oxygen
Correct answer is B
No explanation has been provided for this answer.