MEDIUM
9th CBSE
IMPORTANT
Earn 100

To test the presence of hydrogen gas evolved in a chemical reaction, which is the safest method out of these shown below?

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Important Questions on Multiple Choice Questions

MEDIUM
9th CBSE
IMPORTANT
LIVING SCIENCE CHEMISTRY 9>Chapter 5 - Multiple Choice Questions>Multiple choice questions>Q 20
Which of the following is not observed, when a magnesium ribbon is burnt in the flame of a Bunsen burner?
EASY
9th CBSE
IMPORTANT
LIVING SCIENCE CHEMISTRY 9>Chapter 5 - Multiple Choice Questions>Multiple choice questions>Q 21
When you heat a magnesium ribbon on a burner, it burns with a blinding white light and some residue is left after burning. The residue appears to be like:
MEDIUM
9th CBSE
IMPORTANT
LIVING SCIENCE CHEMISTRY 9>Chapter 5 - Multiple Choice Questions>Multiple choice questions>Q 22
When a solution of barium chloride in water is added to an aqueous solution of sodium sulphate, the following happens.
MEDIUM
9th CBSE
IMPORTANT
LIVING SCIENCE CHEMISTRY 9>Chapter 5 - Multiple Choice Questions>Multiple choice questions>Q 23
When copper sulphate pentahydrate is heated to 250°C, the nature of the condensed vapour is:
MEDIUM
9th CBSE
IMPORTANT
LIVING SCIENCE CHEMISTRY 9>Chapter 5 - Multiple Choice Questions>Multiple choice questions>Q 24

Students were asked to study the reaction between barium chloride and sodium sulphate. Four different reports of the experiment are given below. Choose the correct one.

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MEDIUM
9th CBSE
IMPORTANT
LIVING SCIENCE CHEMISTRY 9>Chapter 5 - Multiple Choice Questions>Multiple choice questions>Q 25

Which of the following experimental arrangements is correct to determine the melting point of ice? 

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MEDIUM
9th CBSE
IMPORTANT
LIVING SCIENCE CHEMISTRY 9>Chapter 5 - Multiple Choice Questions>Multiple choice questions>Q 26
While determining the boiling point of water, the teacher suggested to add some pumice stone pieces to the hard glass test tube containing water. This was done to:
EASY
9th CBSE
IMPORTANT
LIVING SCIENCE CHEMISTRY 9>Chapter 5 - Multiple Choice Questions>Multiple choice questions>Q 27
The following precautions were listed for the experiment to determine the melting point of ice. The incorrect precaution is: