Question

multiple choice questions type questions with answer on chapter chemical equations and reactions for class 10. minimum 10 questions please​

Answer 1

Answer:

Explanation:

Question 1. Which of the following reactions involves the combination of two elements :-

a)CaO + CO2 -> CaCO3

b)4Na + O2 -> 2Na2O

c)SO2 +(1/2)O2 -> SO3

d)NH3 + HCI -> NH4CI

Question 2.When hydrogen sulphide gas is passed through a blue solution of copper sulphate, a black precipitate of copper sulphate is obtained and the sulphuric acid so formed remains in the solution. The reaction is an example of :-

a)A combination reaction

b)A displacement reaction

c)A decomposition reaction

d)A double decomposition reaction

Question 3.What happens when copper rod is dipped in iron sulphate solution :-

a)Copper displaces iron

b)Blue color of copper sulphate solution is obtained

c)No reaction takes place

d)Reaction is exothermic

Question 4.A student added dilute HCI to a test tube containing zinc granules and made following observations :-

a)The zinc surface became dull and black

b)A gas evolved which burnt with a pop sound

c)The solution remained colorless

d)The solution becomes green in color.

Question 5.A dilute solution of sodium carbonate was added to two test tubes one containing dilute HCI (a) and the other containing dilute NaOH (b). the correct observation was :-

a)A brown colored gas liberated in test tube A

b)A brown colored gas liberated in test tube B

c)A colorless gas liberated in test tube A

d)A colorless gas liberated in test tube B

Question 6.A balanced chemical equation is in accordance with

a)Avogadro’s law

b)Law of multiple proportion

c)Law of conservation of mass

d)Law of gaseous volumes

Question 7.The equation

Cu + xHNO3 -> Cu(NO3)2 + yNO2 + 2H2O

The values of x and y are

a)3 and 5

b)8 and 6

c)4 and 2

d)7 and 1

Question 8.Zn + H2SO4(dil) ->ZnSO4 + H2

Above reaction is

a)Decomposition reaction

b)Single displacement reaction

c)Combination reaction

d)Synthesis reaction

Question 9.The reaction in which two compounds exchange their ions to form two new compounds is

a)A displacement reaction

b)A decomposition reaction

c)An isomerization reaction

d)A double displacement reaction

Question 10.When the gases sulphur dioxide and hydrogen sulphide mix in the presence of water, the reaction is

SO2 + 2H2S -> 2H2O + 3S. here hydrogen sulphide is acting as

a)An oxidizing agent

b)A reducing agent

c)A dehydrating agent

d)A catalyst

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Answer 2

Answer:

A

Explanation: