Chemistry Assignment: Reactivity of Element X and Displacement Reaction with Metals

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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?

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?

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?

They lose electrons and gain electrons Signup and view all the answers

Which property would best describe the element 'X' mentioned in the text?

Soft and reacts vigorously with water Signup and view all the answers

If a metal can be easily cut with a knife and is a liquid at room temperature, what element could it be?

Hg Signup and view all the answers

Among the options, which metal is the best conductor of heat?

Cu Signup and view all the answers

Which metal is most likely to react violently with water?

Mg Signup and view all the answers

If a metal can melt by taking heat from your palm, what could it be?

Al Signup and view all the answers

Which metal would be displaced from the solution of its salts by the other three metals listed?

Ag Signup and view all the answers

Which of the following metals can displace zinc from its salt solution?

Copper Signup and view all the answers

On prolonged reaction of iron with steam, which oxide of iron would be obtained?

Fe2O3 Signup and view all the answers

Which acid does not give hydrogen gas on reacting with metals (except Mn and Mg)?

HNO3 Signup and view all the answers

When zinc is added to a solution of iron(II) sulphate, what is observed?

Effervescence of a gas Signup and view all the answers

What happens to zinc during electrolytic refining?

Gets deposited on cathode Signup and view all the answers

Which type of compounds can be formed by carbon?

All of these Signup and view all the answers

What is the ability of an element to form bonds with atoms of the same element to give large molecules known as?

Catenation Signup and view all the answers

Which allotrope of carbon is known for being the hardest substance?

Diamond Signup and view all the answers

What characteristic property is associated with graphite as an allotrope of carbon?

Soft and slippery Signup and view all the answers

What is the general formula for alkenes?

$C_nH_{2n}$ Signup and view all the answers

What type of chemical reaction occurs when magnesium wire is burnt in air?

Combustion reaction Signup and view all the answers

During which process does the reaction 2NaCl(aq) + 2H2O(l) → 2NaOH(aq) + Cl2(g) + H2(g) occur?

Electrolysis of NaCl Signup and view all the answers

In the reaction between Ammonia and Hydrogen Chloride gases, what type of chemical reaction takes place?

Acid-base reaction Signup and view all the answers

What is the nature of the toothpaste commonly used to protect our teeth from decay?

Basic Signup and view all the answers

During the chlor-alkali process, which of the following substances is not produced?

Oxygen gas Signup and view all the answers

What happens when electric current is passed through water?

Water decomposes to form hydrogen and oxygen gases Signup and view all the answers