Chemical Reactions and Equations

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Chemical Reactions and Equations - 05

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Q1. The reaction in which two compounds exchange their ions to form two new compounds is - *

1 point

A displacement reaction

A decomposition reaction

An isomerization reaction

A double displacement reaction

Q2. CuO + H2 ->H2O + Cu, reaction is an example of - *

1 point

Redox reaction

Synthesis reaction

Neutralization

Analysis reaction

Q3. A substance which oxidizes itself and reduces other is known as - *

1 point

Oxidizing agent

Reducing agent

Both of these

None of these

Q4. A redox reaction is one in which - *

1 point

Both the substance are reduced

Both the substance are oxidized

An acid is neutralized by the base

One substance is oxidized while the other is reduced

Q5. In the following equation: Na2CO3 + xHCI = 2NaCI +CO2 + H2O, the value of x is - *

1 point

Q6. Fe2O3+ 2Al = 2AI2O3 + 2FeThe above reaction is an example of a - *

1 point

A combination reaction

A displacement reaction

A decomposition reaction

A double decomposition reaction

Q7. Which of the following does not easily corrode when exposed to the atmosphere - *

1 point

Iron

Copper

Gold

Silver

Q8. Take about 1.0g CaCO3 in a test tube. Heat it over a flame, when a colorless gas comes out. The reaction is called a - *

1 point

Decomposition reaction

Displacement reaction

Double decomposition reaction

Double displacement reaction

Q9. 2CuI-> Cu + CuI2, the reaction is - *

1 point

Redox

b)Neutralization

c)Oxidation

d)Reduction

Q10. Zn+2 (aq) +2e -> Zn(s). this is - *

1 point

Oxidation

Reduction

Redox reaction

None of these

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