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Questions and Answers
What law does a balanced chemical equation always obey?
What law does a balanced chemical equation always obey?
- Law of conservation of Mass (correct)
- Law of thermal equilibrium
- Law of conservation of energy
- All of the above
In a chemical reaction, what type of reaction is observed when there is a displacement of elements?
In a chemical reaction, what type of reaction is observed when there is a displacement of elements?
- Combination reaction
- Decomposition reaction
- Double displacement reaction
- Displacement reaction (correct)
When potassium iodide (KI) is added to lead nitrate (Pb(NO3)2), what is the expected observation?
When potassium iodide (KI) is added to lead nitrate (Pb(NO3)2), what is the expected observation?
- Yellow precipitate of lead iodide is formed
- Lead iodide is soluble in water
- No reaction takes place
- White precipitate of lead iodide is formed (correct)
What happens when the reactants undergo oxidation and reduction in a chemical reaction?
What happens when the reactants undergo oxidation and reduction in a chemical reaction?
Which property would best describe the element 'X' mentioned in the text?
Which property would best describe the element 'X' mentioned in the text?
If a metal can be easily cut with a knife and is a liquid at room temperature, what element could it be?
If a metal can be easily cut with a knife and is a liquid at room temperature, what element could it be?
Among the options, which metal is the best conductor of heat?
Among the options, which metal is the best conductor of heat?
Which metal is most likely to react violently with water?
Which metal is most likely to react violently with water?
If a metal can melt by taking heat from your palm, what could it be?
If a metal can melt by taking heat from your palm, what could it be?
Which metal would be displaced from the solution of its salts by the other three metals listed?
Which metal would be displaced from the solution of its salts by the other three metals listed?
Which of the following metals can displace zinc from its salt solution?
Which of the following metals can displace zinc from its salt solution?
On prolonged reaction of iron with steam, which oxide of iron would be obtained?
On prolonged reaction of iron with steam, which oxide of iron would be obtained?
Which acid does not give hydrogen gas on reacting with metals (except Mn and Mg)?
Which acid does not give hydrogen gas on reacting with metals (except Mn and Mg)?
When zinc is added to a solution of iron(II) sulphate, what is observed?
When zinc is added to a solution of iron(II) sulphate, what is observed?
What happens to zinc during electrolytic refining?
What happens to zinc during electrolytic refining?
Which type of compounds can be formed by carbon?
Which type of compounds can be formed by carbon?
What is the ability of an element to form bonds with atoms of the same element to give large molecules known as?
What is the ability of an element to form bonds with atoms of the same element to give large molecules known as?
Which allotrope of carbon is known for being the hardest substance?
Which allotrope of carbon is known for being the hardest substance?
What characteristic property is associated with graphite as an allotrope of carbon?
What characteristic property is associated with graphite as an allotrope of carbon?
What is the general formula for alkenes?
What is the general formula for alkenes?
What type of chemical reaction occurs when magnesium wire is burnt in air?
What type of chemical reaction occurs when magnesium wire is burnt in air?
During which process does the reaction 2NaCl(aq) + 2H2O(l) → 2NaOH(aq) + Cl2(g) + H2(g) occur?
During which process does the reaction 2NaCl(aq) + 2H2O(l) → 2NaOH(aq) + Cl2(g) + H2(g) occur?
In the reaction between Ammonia and Hydrogen Chloride gases, what type of chemical reaction takes place?
In the reaction between Ammonia and Hydrogen Chloride gases, what type of chemical reaction takes place?
What is the nature of the toothpaste commonly used to protect our teeth from decay?
What is the nature of the toothpaste commonly used to protect our teeth from decay?
During the chlor-alkali process, which of the following substances is not produced?
During the chlor-alkali process, which of the following substances is not produced?
What happens when electric current is passed through water?
What happens when electric current is passed through water?
