| Questions | Answer | Explanations |
| 21 exactly how is a chemistry reaction impacted by the enhancement of a catalyst?(1) The activation energy decreases.(2) The warm of reaction increases.(3) The variety of collisions between particles decreases.(4) The potential power of the reactants increases. | 1 | Catalyst-lowers act. Energy |
| 22 equipment in nature tend to undergo transforms toward(1) reduced energy and less disorder(2) lower power and much more disorder(3) greater energy and less disorder(4) greater energy and much more disorder | 2 | exothermic and increase in entropy |
| 23 What have the right to be concluded if one ion the an element is smaller than one atom that the very same element?(1) The ion is negative charged due to the fact that it has actually fewer electrons 보다 the atom.(2) The ion is negatively charged due to the fact that it has an ext electrons than the atom.(3) The ion is positive charged because it has actually fewer electrons 보다 the atom.(4) The ion is positive charged because it has more electrons than the atom. | 3 | ions room smaller when they have lost an electron |
| 24 Which course of essential compounds has molecules the contain nitrogen atoms?(1) alcohol (3) ether(2) amine (4) ketone | 2 | TABLE R |
| 25 Which 2 compounds have actually the same molecular formula however different chemical and also physical properties?(1) CH3CH2Cl and also CH3CH2Br(2) CH3CHCH2 and CH3CH2CH3(3) CH3CHO and also CH3COCH3(4) CH3CH2OH and also CH3OCH3 | 4 | count atoms they have to have the very same number |
| 28 Which form of reaction occurs as soon as a high power particle collides v the cell core of an atom, converting that atom to an atom that a different element?(1) addition (3) substitution(2) neutralization (4) transmutation | 4 | definition of transmutation |
| 29 Which bit is emitted as soon as an atom of 85Kr spontaneously decays?(1) one alpha bit (3) a neutron(2) a beta particle (4) a proton | 2 | Use decay Mode indigenous Table N |
| 30 What is a difficulty commonly connected with nuclear power facilities?(1) A little quantity of power is produced.(2) Reaction assets contribute to mountain rain.(3) it is impossible to regulate nuclear fission.(4) it is complicated to dispose of wastes | 4 | Use your brian |