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Chemistry MCQs

216 Questions Subject Test
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Atomic StructureChemical BondingReactionsOrganic Chemistry
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What is saponification in chemistry?

  • A Making soap by reacting fats with a strong alkali
  • B Conversion of oils to alcohol
  • C Adding hydrogen to unsaturated fats
  • D Making esters from acids and alcohols
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What is the term for a solution that resists changes in pH?

  • A Saturated solution
  • B Buffer solution
  • C Colloid
  • D Suspension
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Which type of bonding is present in a diamond?

  • A Ionic
  • B Covalent
  • C Metallic
  • D Van der Waals
184
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What is the chemical name of the compound with formula Na2SO4?

  • A Sodium sulfite
  • B Sodium sulfate
  • C Sodium sulfide
  • D Sodium bisulfate
185
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Which type of chemical formula shows the actual number of atoms in a molecule?

  • A Molecular formula
  • B Structural formula
  • C General formula
  • D Empirical formula
186
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Transition metals are characterized by partially filled which subshell?

  • A s subshell
  • B p subshell
  • C f subshell
  • D d subshell
187
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What is the chemical formula for ethanol the type of alcohol found in beverages?

  • A C2H5OH
  • B CH3OH
  • C C3H7OH
  • D C4H9OH
188
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Which of the following is the strongest acid?

  • A Acetic acid
  • B Hydrochloric acid
  • C Carbonic acid
  • D Citric acid
189
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What is the conjugate base of HCl?

  • A OH-
  • B Cl-
  • C H3O+
  • D H+
190
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What is the chemical formula for ethanoic acid commonly found in vinegar?

  • A CH3COOH
  • B HCOOH
  • C CH3CH2COOH
  • D C3H7COOH
191
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What is the chemical formula for washing soda used in cleaning?

  • A NaHCO3
  • B NaCl
  • C Na2CO3
  • D NaOH
192
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Which element is known as the 'King of Chemicals'?

  • A Hydrochloric acid
  • B Acetic acid
  • C Nitric acid
  • D Sulfuric acid
193
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Which type of isomerism involves the same molecular formula but different structural arrangements?

  • A Optical isomerism
  • B Conformational isomerism
  • C Structural isomerism
  • D Geometric isomerism
194
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What is the valency of carbon that makes it the basis of organic chemistry?

  • A 2
  • B 3
  • C 4
  • D 6
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What type of oxide typically forms when a non-metal reacts with oxygen?

  • A Acidic oxide
  • B Neutral oxide
  • C Amphoteric oxide
  • D Basic oxide
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Which type of bond involves the sharing of electron pairs?

  • A Ionic bond
  • B Covalent bond
  • C Metallic bond
  • D Hydrogen bond
197
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What is the general formula of alkanes where n is the number of carbon atoms?

  • A CnH2n
  • B CnH2n+2
  • C CnHn
  • D CnH2n-2
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What does the term 'activation energy' refer to?

  • A Energy of products only
  • B Minimum energy needed to start a reaction
  • C Energy of reactants only
  • D Total energy released in reaction
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Which element is liquid at room temperature and is the only non-metal element in this state?

  • A Mercury
  • B Bromine
  • C Gallium
  • D Caesium
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What is an isotope?

  • A Atoms of different elements with the same mass
  • B Atoms of the same element with different numbers of protons
  • C Atoms of the same element with the same number of protons but different neutrons
  • D Atoms of different elements with the same electrons
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