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Translate the following statement into a chemical equation and then balance it.
Hydrogen sulphide gas burns in the air to give water and sulphur dioxide.
Concept: Chemical Equations
Translate the following statement into a chemical equation and then balance it.
Barium chloride reacts with aluminium sulphate to give aluminium chloride and a precipitate of barium sulphate.
Concept: Chemical Equations
Write the balanced chemical equation for the following reaction.
\[\ce{Aluminium + Copper chloride -> Aluminium chloride + Copper}\]
Concept: Chemical Equations
Write the balanced chemical equation for the following reaction.
\[\ce{Calcium hydroxide + Carbon dioxide → Calcium carbonate + Water}\]
Concept: Chemical Equations
Write the balanced chemical equation for the following and identify the type of reaction.
\[\ce{Potassium bromide (aq) + Barium iodide (aq) -> Potassium iodide (aq) + Barium bromide (s)}\]
Concept: Types of Chemical Reactions > Double Displacement Reaction
What do you mean by a precipitation reaction? Explain giving an example.
Concept: Types of Chemical Reactions > Double Displacement Reaction
Give reasons:
Platinum, gold and silver are used to make jewellery.
Concept: Corrosion of Metals
On what basis is a chemical equation balanced?
Concept: Chemical Equations
Write any two observations in an activity which may suggest that a chemical reaction has taken place. Give an example in support of your answer.
Concept: Chemical Equations
What is meant by a decomposition reaction?
Concept: Types of Chemical Reactions > Decomposition Reaction
Complete the following equation:
CH4 + O2 —>
Concept: Chemical Equations
Complete the following equation:
CH2 + H5OH `("Hot Conc." H_2SO_4)/`>
Concept: Chemical Equations
Complete the following equation:
CH3COOH + NaOH →
Concept: Chemical Equations
A student weighed some raisins and recorded the weight as ‘x’. She then soaked the raisins in distilled water. After about 2 hours she removed the raisins, wiped them dry and weighed them again, and recorded that as ‘y’. The percentage of water absorbed by raisins may be determined using the relationship.
Concept: Chemical Equations
In the experiment for determining the percentage of water absorbed by raisins, we do the final weighing of the raisins after keeping them dipped in water for about one hour. For the accuracy of the result, the extra water from the surface of the soaked raisins is removed by
Concept: Chemical Equations
The aqueous solutions of copper sulphate and zinc sulphate appear
(A) blue and green respectively
(B) green and colourless respectively
(C) blue and brown respectively
(D) blue and colourless respectively.
Concept: Types of Chemical Reactions > Double Displacement Reaction
Solutions of copper sulphate, iron sulphate and zinc sulphate are prepared and marked I, II and III respectively. Few pieces of aluminium are added to each solutions. After some time a change will be observe in
(A) I and II
(B) II and III
(C) III and I
(D) All the three
Concept: Types of Chemical Reactions > Double Displacement Reaction
To determine the percentage of water absorbed by raisins, raisins are soaked in water for:
Concept: Chemical Equations
Raisins are wiped off gently before final weighing with the help of
Concept: Chemical Equations
The step(s) necessary for determining the percentage of water absorbed by raisins is/are:
Concept: Chemical Equations
