NSO Level 1- Science Olympiad (SOF) Class 10: Questions 1074 - 1078 of 1497
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Passage
Direction: Read the following passage and answer the question.
A silvery metal that resists corrosion even at high temperatures.
Metal is used in batteries, metal is resists corrosion and is used to plate other metals to protect them. Metal has a long history of being used in coins.
Other hand non-metal is colorless, odorless gas that is totally unreactive.
Non-metal is used as a cooling medium. Moreover, because of its low density non-metal is often used to fill decorative balloons, weather balloons and airships.
Question 1074 (3 of 3 Based on Passage)
Question MCQ▾
Among the following choices, which is not correct?
Choices
Choice (4) | Response | |
---|---|---|
a. | Non-metal has low melting and boiling points | |
b. | Metal react with oxygen to form basic oxides | |
c. | Non-metal Dull sound when hit with hammer | |
d. | Metal React with oxygen to form acidic oxides |
Question 1075
Question MCQ▾
If the absolute refractive indices of water, glass and diamond are 1.33,1.50 and 2.42, respectively, then which medium is optically densest?
Choices
Choice (4) | Response | |
---|---|---|
a. | Water | |
b. | Diamond | |
c. | Glass | |
d. | None of the above |
Question 1076
Question Match List-Ⅰ List-Ⅱ▾
Match column I and column II and select the correct option from the codes given below.
List-Ⅰ (Column I) | List-Ⅱ (Column II) |
---|---|
(A) Non convention source of energy | (i) Coal |
(B) Hydro power plant | (ii) Water |
(C) Convention source of energy | (iii) Uranium |
(D) Nuclear power plant | (iv) Nuclear energy |
Choices
Choice (4) | Response | |
---|---|---|
| ||
a. |
| |
b. |
| |
c. |
| |
d. |
|
Question 1077
Question MCQ▾
In a food chain, the third trophic level is always occupied by
Choices
Choice (4) | Response | |
---|---|---|
a. | Decomposers | |
b. | Herbivores | |
c. | Producers | |
d. | Carnivores |
Question 1078
Question MCQ▾
Read the given statement and mark the correct option.
Statement 1: Convex mirror in object and image is perpendicular to the mirror
Statement 2: Convex mirror has used in security mirror and side view mirrors in cars
Choices
Choice (4) | Response | |
---|---|---|
a. | Only statement 2 is correct | |
b. | Statements 1 and 2 are incorrect | |
c. | Statements 1 and 2 are correct | |
d. | Only statement 1 is correct |