Dinesh Chemistry Class 9

Dinesh Chemistry Class 9. We covered all the Dinesh Chemistry Class 9 in this post for free so that you can practice well for the exam.

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Dinesh Chemistry Class 9 Objective for Students

A steady current of 5 A is passed through an aqueous solution of zinc sulfate for 40 minutes. What Mass of zinc will be deposited at the cathode?

a) 0.4065 g

b) 65.05 g

c) 40.65 g

d) 4.065 g

Show Answer

During the extraction of aluminium from bauxite by the Hall process, carbon anodes react to form carbon dioxide. What Mass of carbon anode is consumed in producing 270 kg of aluminium?

a) 180 kg

b) 270 kg

c) 540 kg

d) 9.0 kg

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Which device converts the chemical energy released during the combustion of fuels such as hydrogen or methane directly into electrical energy?

a) Dynamo

b) Nickel–cadmium cell

c) Fuel cell

d) Electrolytic cell

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A certain electric current liberates 0.504 g of hydrogen in 2 hours. How much copper will be deposited by the same current in the same time from a copper sulfate solution?

a) 31.8 g

b) 16.0 g

c) 12.7 g

d) 63.5 g

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What quantity of electric charge is required to deposit 63.5 g of copper from a copper sulfate solution using copper electrodes?

a) 9650 C

b) 193000 C

c) 96500 C

d) 19300 C

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At STP, 1.12 L of hydrogen gas is liberated when a current flows for 965 seconds through a solution. What is the value of the current?

a) 10 A

b) 1.5 A

c) 1.0 A

d) 2 A

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A certain quantity of Electricity produces 5600 mL of oxygen gas at STP. What Mass of silver (atomic Mass = 108) will be deposited by the same quantity of Electricity?

a) 5.4 g

b) 10.8 g

c) 54.0 g

d) 108.0 g

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A solution of cobalt(II) chloride is electrolyzed using a current of 10 A for 109 minutes. How much cobalt metal will be deposited? (1 Faraday = 96,500 C, atomic Mass of Co = 59 u)

a) 4.0 g

b) 20.0 g

c) 40.0 g

d) 0.66 g

Show Answer

We covered all the Dinesh Chemistry Class 9 above in this post for free so that you can practice well for the exam.

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Also, check out:

• Chemistry Sample Paper Class 9 ICSE
• Chemistry NEET Prep
• Chemistry Important Questions Class 12 State Board