NSO Level 1- Science Olympiad (SOF) Class 8: Questions 726 - 729 of 1178
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Question 726
Question MCQ▾
Diya was doing experiment. The steps of procedure are given here.
i) She took a test tube and put small pieces of copper wire in it.
ii) Added 4 to 5 drops of dilute sulphuric acid in test tube.
iii) Brought a lighted match stick near the mouth of the test tubes
She observed that the match stick burnt with a pop sound. What does the pop sound indicate?
Choices
Choice (4) | Response | |
---|---|---|
a. | A gas which extinguish the fire is produced due to the chemical reaction. | |
b. | A gas which helps in combustion is produced due to chemical reaction. | |
c. | A highly inflammable gas is produced due to the chemical reaction | |
d. | Question does not provide sufficient data or is vague |
Question 727
Question MCQ▾
Hydrogen is a highly inflammable gas. The product formed when hydrogen burns in air is
Choices
Choice (4) | Response | |
---|---|---|
a. | Hydrogen peroxide | |
b. | Hydroxide | |
c. | Water | |
d. | All of the above |
Question 728
Question MCQ▾
Which of the following is not an example of an oviparous animal?
Choices
Choice (4) | Response | |
---|---|---|
a. | Frog | |
b. | Crocodile | |
c. | Duck | |
d. | Blue whale |
Question 729
Question MCQ▾
Frictional force is applied in the direction of
Choices
Choice (4) | Response | |
---|---|---|
a. | Opposite to the object | |
b. | The object | |
c. | Downwards | |
d. | None of the above |