NDA || Chemistry || Chemical Equation || Quiz 2020

Metal compound A reacts with dilute hydrochloric acid to produce effervescence. The gas evolved extinguishes the burning candle. The balanced chemical equation for the reaction if one of the products is calcium chloride:

In a balanced equation-

           H₂SO₄ + xHI → H₂S + yI₂ + zH₂O

The values of x, y, z are                

Choose the correct option for the given chemical equations.

[I] Cu + 2Ag⁺ → Cu²⁺⁺ +2Ag

[II] MnO₂ + 4HCl→ MnCl₂+ 2H₂O + Cl₂

Choose an incorrect option from the following statements.                    

           H₂S + Cl₂→ 2HCl + S

Consider the following reaction:

CH₄ + 2O₂→ CO₂ + 2H₂O

Which of the following about the reaction given above is/are correct?

1) Carbon is oxidized.

2) Hydrogen is oxidized.

3) Hydrogen is reduced.

4) Carbon is reduced.

Select the correct answer using the code given below:

Consider the following reaction

x Mg(OH)₂(aq) + y H₃ PO₄ (aq)  z H₂ O (l) + Mg₃ (PO₄)₂ (aq)

Find the value of coefficient of H₂O when equation is in balanced condition?

Choose the correct balanced chemical equations for the following reaction:

Ethane reacts with oxygen to produce carbon dioxide and water with the evolution of heat and light.

The balanced chemical equations for the following reactions is:

Ethane is burnt in the presence of oxygen to form carbon dioxide, water and releases heat and light.

Consider the following reaction:

xAa₂S₃ + yO₂→ zAs₂O₃ + wSO₂

What is y (the coefficient for O₂) when this equation is balanced using whole number coefficients?

Note the following balanced chemical equation:

Which one of the following statements is significant in relation to the above chemical equation?