SS3/GRADE12 - CHEMISTRY

Straight and branched chain organic compounds are

• aromatic

• aliphatic

• alicyclic

• heterocyclic

The atoms ⁴⁰₂₀A and ⁴¹_x^{B are isotopes of the same element. The value of x in atom B is}

• 41

• 40

• 21

• 20

Which of the following statements is correct when a mixture of sodium chloride and ammonium chloride is heated?

• Ammonium chloride sublimes

• Both compounds melt

• Sodium chloride fuses

• Sodium chloride melts

Which of the following conditions would lead to increase in the rate of reaction?

• increase in temperature and decrease in the surface area of reactants

• increase in both temperature and concentration of reactants

• decrease in temperature and increase in concentration of reactants

• decrease in temperature and increase in the surface area of reactants

The element with electron configuration 1s²2s²2p⁶3s² is

• a metal

• a non - metal

• a halogen

• an inert gas

Which of the following alkanols would produce only one type of alkene on dehydration?

• CH₃CH₂CH(OH)CH₃

• CH₃C(CH₃)(OH)CH₃

• CH₃CH(OH) CH₃

• CH₃CH₂CH₂OH

Which of the following compounds in aqueous solution is neutral to litmus?

• KHCO₃

• Na₂CO₃

• FeCl₃

• NaCl

The IUPAC name for CH₃C(CH₃)CH₂ is

• 2- methylbutene

• 2 - methylprop-2 - ene

• 2 - methylpropene

• but - 1 - ene

Manganese(IV)oxide is known to hasten the decomposition of hydrogen peroxide. Its main action is to

• lower the activation energy of the reaction

• increase the surface area of the reactants

• lower the heat of reaction

• increase the concentration of the reactants

How many moles of AgNO₃ are there in 550cm³ of 0.01mol/dm³ AgNO₃ solution?

• 5.5000

• 0.5500

• 0.0550

• 0.0055