Chemistry Quiz- 6

1. Which one among the following would expand the most on being heated ?

Correct! Wrong!

Ans. : - (d)

2. Which one among the following substances evolves heat when dissolved in water ?

Correct! Wrong!

Ans. : - (d)

3. Which element forms the highest number of compounds in the periodic table ?

Correct! Wrong!

Ans. : - (a)

4. Which one among the following is responsible for the expansion of water in the ocean ?

Correct! Wrong!

Ans. : - (a)

5. What is the role of positive catalyst in a chemical reaction ?

Correct! Wrong!

Ans. : - (c)

6. Why hard water does not give lather with soap ?

Please select 2 correct answers

Correct! Wrong!

Ans. : - (a)

7. The law enforcement agencies use a chemical test to approximate a person's blood alcohol level. The person undergoing the test blows into the mouthpiece of a bag containing sodium dichromate solution in acidic medium. A chemical reaction with ethanol changes the colour of the solution from -

Correct! Wrong!

Ans. : - (a)

8. Which one of the following chemicals is commonly used by farmers to destroy weeds ?

Correct! Wrong!

Ans. : - (d)

9. If a limestone piece is dipped in water, a bubble evolves. The bubbling is due to -

Correct! Wrong!

Ans. : - (d)

10. A woman desires to clean the surface of her gold ornaments by a chemical approach. For this she requires to use -

Correct! Wrong!

Ans. : - (a)

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