Chem Bond Chemicals. We covered all the Chem Bond Chemicals in this post for free so that you can practice well for the exam.
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MCQ on Chem Bond Chemicals for Students
Consider the reaction Fe₂O3 +2Al -> Al₂O3 + 2Fe The above reaction is an example of
(a) a combination reaction
(b) a double displacement reaction
(c) a decomposition reaction
(d) a simple displacement reaction
What happens when dilute hydrochloric acid is added to iron fillings? Tick the correct answer.
(a) Hydrogen gas and iron chloride are formed.
(b) Chlorine gas and iron chloride are formed.
(c) No reaction takes place.
(d) Iron salts and water are produced.
What happens when a copper rod is dipped in an iron sulphate solution?
(a) Copper displaces iron
(b) Blue colour of copper sulphate solution is obtained
(c) No reaction takes place
(d) Reaction is exothermic
AgNO3(aq) + NaCl(aq) -> AgCl(s) + NaNO3(aq) Above reaction is
(a) a precipitation reaction
(b) double displacement reaction
(c) a combination reaction
(d) (a) and (b) Both
The reaction in which two compounds exchange their ions to form two new compounds is
(a) a displacement reaction
(b) a decomposition reaction
(c) an isomerization reaction
(d) a double displacement reaction
When the gases sulphur dioxide and hydrogen sulphide mix in the presence of water, the reaction is SO₂ + 2H₂S -> 2H₂O +35. Here hydrogen sulphide is acting as
(a) an oxidising agent
(b) a reducing agent
(c) a dehydrating agent
(d) a catalyst
A substance which oxidises itself and reduces others is known as
(a) oxidising agent
(b) reducing agent
(c) Both of these
(d) None of these
In the reaction PbO+C -> Pb+CO
(a) PbO is the reducing agent
(b) C acts as an oxidising agent
(c) C acts as a reducing agent
(d) This reaction does not represent a redox reaction
CuO+H₂ -> H₂O+Cu reaction is an example of
(a) redox reaction
(b) synthesis reaction
(c) neutralisation
(d) analysis reaction
The electrolysis of water is a decomposition reaction. The mole ratio of hydrogen and oxygen gases liberated during the electrolysis of water is :
(a) 1: 1
(b) 2: 1
(c) 4: 1
(d) 1: 2
When SO₂ gas is passed through a saturated solution of H₂S, which of the following reaction occurs?
(a) SO₂ + 2H₂S → 2H₂0 +3S
(b) SO₂ + 2H₂S → H₂0+3S
(c) SO₂ + H₂S →H₂O+S
(d) SO₂ + H₂O → SO3 + H₂
Name the products formed when iron filings are heated with dilute hydrochloric acid
(a) Fe (III) chloride and water
(b) Fe (II) chloride and water
(c) Fe (II) chloride and hydrogen gas
(d) Fe (III) chloride and hydrogen gas
Pb+ CuCl₂ →PbCl₂ + Cu The above reaction is an example of :
(a) combination
(b) double displacement
(c) decomposition
(d) displacement
Which of the following gases can be used for storage
(a) Carbon dioxide or Oxygen
(b) Nitrogen or Oxygen
(c) Carbon dioxide or Helium
(d) Helium or Nitrogen
A dilute ferrous sulphate solution was gradually added to the beaker containing acidified permanganate solution. The light purple colour of the solution fades and finally disappears. Which of the following is the correct explanation for the observation?
(a) KMnO4 is an oxidising agent, it oxidises FeSO4.
(b) FeSO4 acts as an oxidising agent and oxidises KMNO4
(c) The colour disappears due to dilution; no reaction is involved.
(d) KMnO4 is an unstable compound and de-composes in presence of FeSO4. to a colourless compound.
In which of the following chemical equations, do the abbreviations represent the correct states of the reactants and products involved at reaction temperature?
(a) 2H₂ (l) + O₂ (l) > 2H₂O(g)
(b) 2H₂(g) + O₂ (l) > 2H₂O (l)
(c) 2H₂ (g) + O₂ (g) > 2H₂O (l)
(d) 2H₂ (g) +O₂ (g) > 2H₂O(g)
A balanced chemical equation is in accordance with
(a) the Law of multiple proportions
(b) the Law of conservation of mass
(c) Both (a) and (b)
(d) Neither (a) nor (b)
A change is said to be a chemical change when
(a) Energy change occurs
(b) New substances are formed
(c) The change cannot be easily reversed
(d) All statements are correct
Which of the following statements is true?
(a) The total mass of the substance remains the same in chemical change
(b) Chemical change is permanent and irreversible
(c) Physical change is temporary and reversible
(d) All of these
Which of the following statements is not correct?
(a) A chemical equation tells us about the substances involved in a reaction.
(b) A chemical equation informs us about the symbols and formulas of substances involved in a reaction
(c) A chemical equation tells us about the atom or molecules of the reactants and products involved in a reaction
(d) All are correct
Which one is not a balanced equation?
(a) Fe+ Cl₂ →FeCl3
(b) Mg+CuSO4 → MgSO4 + Cu
(c) Zn+S →ZnS
(d) 2NaOH+H₂SO4 →Na₂SO4 + 2H₂O
A substance added to food containing fats and oils is called :
(a) Oxidant
(b) Rancid
(c) Coolant
(d) Antioxidant
The condition produced by aerial oxidation of fats and oils in foods marked by unpleasant smell and taste is called :
(a) antioxidation
(b) reduction
(c) rancidity
(d) corrosion
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