The colour of phenolphthalein indicator in dilute HNO is
colourless
orange
pink
purple
Correct answer is A
No explanation has been provided for this answer.
6C (s) + 6H 2(g) + 3O2(g) → C 6H12O6(s)
6CO2(g) + 6H2O (l) → C6H12O6(s) + 6O 2(g)
6C(g) + 6H 2(g) + 3O2(g) → C6H12O 6(s)
6C(g) + 6H 2(g) + 3O2(g) → C 6H 12O 6(aq)
Correct answer is B
No explanation has been provided for this answer.
Diamond does not conduct electricity because it?
has no free valence electrons
is a giant molecule
contains no bonded electrons
is a solid at room temperature
Correct answer is A
It does not conduct electricity. Every atom in a diamond is bonded to its neighbours by four strong covalent bonds, leaving no free electrons and no ions .
The collision theory proposes that
reactants collide more frequently to bring about reduction in the reaction rate
all collisions of reactants are effective
reactants must collide with a certain minimum amount of energy to from products
the fewer the collisions the faster the reaction rate
Correct answer is C
No explanation has been provided for this answer.
When concentrated H2
SO 4 is added to NaCI (s), the gas evolved
bleaches damp blue litmus paper
forms a white preciptate with AgNO3(aq)
forms a white precipitate with BaCI2(aq)
turns moist red litmus paper blue
Correct answer is A
No explanation has been provided for this answer.