Chemical Reactions and Equations

Select the appropriate state symbols of the products given as X and Y in the following chemical equation by choosing the correct option from table given below:
Zn(s) + H₂SO₄(l) → ZnSO₄(X) + H₂(Y)

• a. X is (s) and Y is (l)

• b. X is (aq) and Y is (g)

• 
  c. X is (aq) and Y is (s)

• 
  d. X is (g) and Y is (aq)

Consider the following chemical equation I and II
I. Mg + 2HCl → MgCl₂ + H₂
II. NaOH + HCl → NaCl + H₂O
The correct statement about these equations is :

• a. ‘I’ is a displacement reaction and ‘II’ is a decomposition reaction.

• b. ‘I’ is a displacement reaction and ‘II’ is double displacement reaction.

• 
  c. Both ‘I’ and ‘II’ are dispalcement reactions.

• d. Both ‘I’ and ‘II’ are double displacement.

To balance the following chemical equation to the values of x and y should respectively be :
2NaOH + xAl₂O₃ → yNaAlO₂ + H₂O

• a. 1, 4

• b. 1, 2

• c. 2, 4

• d. 2, 3

Identify the product which represents the soild state in the above reaction:

• Barium Chloride

• Barium Sulphate

• Sodium Chloride

• Sodium Sulphate

Strong heating of ferrous sulphate leads to the formation of a brown solid and two gases. This reaction can be categorised as:-

• a. displacement and redox

• b. decomposition and redox

• c. displacement and endothermic

• d. decomposition and exothermic

Assertion (A): Silver bromide decomposition is used in black and white photography.

Reason (R): Light provides energy for this exothermic reaction.

• Both A and R are true and R is the correct explanation of A

• Both A and R are true and R is not correct explanation of A

• A is true but R is false

• A is false but R is ture

Assertion (A): Burning of natural gases is an endothermic process

Reason (R): Methane gas combines with oxygen to produce carbon dioxide and water

• Both A and R are true and R is correct explanation of A

• Both A and R are true and R is not correct explanation of A

• A is true but R is false

• A is false and R is true

Study the following chemical reaction :
2Na(s)+2H2O(l)→2NaOH(aq)+H2(g)↑ The reducing agent in this reaction is:

• Na

• H2O

• NaOH

• H2

• a

• b

• c

• d

Which of the following is a displacement reaction?

• a

• b

• c

• d