Choose the correct alternative and rewrite statement. Chapter No. 3: Chemical Reactions and Equations.

Choose the correct alternative and rewrite statement.
Chapter No. 3: Chemical Reactions and Equations.

Which of the following gases turns lime water milky?

A. H2
B. CO2
C. NO2
D. SO2

Which of the following is CORRECT for double displacement reaction?

A. Ions are exchanged
B. Ions are not produced
C. One substance is formed from two or more substances.
D. Two or more substances are produced from one substance.

Which among the following is double displacement reaction?

A. AgNO3 + NaCl ----->  AgCl + NaNO3
B. Pb + CuCl2  -----> PbCl2 + Cu
C. 2Mg + O2  -------> 2MgO
D. CH4 + 2O2 ------> CO2 + 2H2O

Which gas is liberated when aluminium metal reacts with dilute hydrochloric acid?

A. H2O2
B. H2
C. Cl2
D. O2

Which of the following is formed when ethyl alcohol is treated with acidic potassium dichromate?

A. Methyl alcohol
B. Acetic acid
C. Methane
D. Ethene

When aqueous NaOH is added to copper sulphate solution, the products formed are ______
A. copper hydroxide and sodium
B. copper hydroxide and sodium sulphate
C. copper hydroxide, sodium and water
D. copper, sodium sulphate and water


Answers:

Chapter No. 3: Chemical Reactions and Equations.

Which of the following gases turns lime water milky?

A. H2
B. CO2
C. NO2
D. SO2

Which of the following is CORRECT for double displacement reaction?

A. Ions are exchanged
B. Ions are not produced
C. One substance is formed from two or more substances.
D. Two or more substances are produced from one substance.

Which among the following is double displacement reaction?

A. AgNO3 + NaCl ----->  AgCl + NaNO3
B. Pb + CuCl2  -----> PbCl2 + Cu
C. 2Mg + O2  -------> 2MgO
D. CH4 + 2O2 ------> CO2 + 2H2O

Which gas is liberated when aluminium metal reacts with dilute hydrochloric acid?

A. H2O2
B. H2
C. Cl2
D. O2

Which of the following is formed when ethyl alcohol is treated with acidic potassium dichromate?

A. Methyl alcohol
B. Acetic acid
C. Methane
D. Ethene

When aqueous NaOH is added to copper sulphate solution, the products formed are ______
A. copper hydroxide and sodium
B. copper hydroxide and sodium sulphate
C. copper hydroxide, sodium and water
D. copper, sodium sulphate and water