Consider the following reaction equation: Br2+2KI→2KBr+I2. Bromine is acting as
an oxidizing agent
a reducing agent
an acid
a base
Correct answer is A
No explanation has been provided for this answer.
C2H4
C3H4
C3H6
C4H8
Correct answer is C
Given the molecular formula, CH2.
The empirical formula will be (CH2)n= 42
(12+(2×1))n=42
⇒ 14n=42
n = 3, hence the empirical formula is C3H6
In which of the following compounds does hydrogen form ionic compounds?
CH4
HCl
NH3
NaH
Correct answer is D
The bonding between a non-metal and a metal is an ionic bonding. In metal hydrides, Hydrogen takes on the ionic charge of -1, hence forming an ionic bond with the metals.
A reaction is endothermic if the
reaction vessel feels cool during the reaction
enthalpy change is negative
bond forming energy exceeds bond breaking energy
heat of formation of reactants exceeds heat of formation of products
Correct answer is A
Endothermic reactions absorb heat from their surroundings during the reaction process. This means that in the course of the reaction the vessel being used in the reaction will be cool in the process.
double anions in its aqueous solution
a single cation in its aqueous solution
hydrogen ions in its aqueous solution
hydrogen atoms in its aqueous solution
Correct answer is C
Acid salts are salts whose aqueous solutions are acidic in character, implying that their aqueous solutions possess hydrogen ions.