NSO Level 1- Science Olympiad (SOF) Class 10: Questions 338 - 343 of 986

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Question number: 338

» Periodic Classification of Elements

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MCQ▾

Question

Read the given statements and mark the correct option.

Statement 1: According to Doberiner’s Law of Triads, in certain triads (grout of three elements) the atomic number of the central element was the Addition of the other two elements.

Statement 2: Mendeleev corrected the atomic masses of certain elements with the help of their expected positions and properties.

Choices

Choice (4) Response

a.

Only statement 2 is correct

b.

Only statement 1 is correct

c.

Statements 1 and 2 are correct

d.

Statements 1 and 2 are incorrect

Question number: 339

» Life Processes

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MCQ▾

Question

Growth in response to the direction of light, which called

Choices

Choice (4) Response

a.

Positive tropism

b.

Geotropism

c.

Phototropism

d.

Negative tropism

Question number: 340

» Carbon and Its Componds

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MCQ▾

Question

Which is not correct for covalent compounds?

Choices

Choice (4) Response

a.

Don’t Dissolve in water

b.

High Melting points

c.

Electrons are shared

d.

Don’t Conduct electricity

Question number: 341

» Heredity and Evolution

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MCQ▾

Question

Which of the following is/are not varieties of wild cabbage?

Choices

Choice (4) Response

a.

Broccoli

b.

Cauliflower

c.

Red cabbage

d.

None of the above

Passage

Direction: Read the following passage and answer the question.

Table of the common name and IUPAC name

Table of the common name and IUPAC name

Common name

IUPAC Name

Formula

Methane

Methane

Ethane

Ethane

?

?

Acetylene

Ethyne

Formaldehyde

?

Acetaldehyde

Ethanal

?

Methanoic Acid

Acetic acid

Ethanoic acid

Question number: 342 (1 of 3 Based on Passage) Show Passage

» Carbon and Its Componds

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MCQ▾

Question

What is Formula and IUPAC Name Of Formaldehyde

Choices

Choice (4) Response

a.

Methanal

b.

Ethanoic acid

c.

Ethyne

d.

Ethen

Question number: 343 (2 of 3 Based on Passage) Show Passage

» Carbon and Its Componds

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MCQ▾

Question

What is common name and IUPAC name of

Choices

Choice (4) Response

a.

Acetylene and Ethyne

b.

Ethyne and Ethyne

c.

Methane and Methane

d.

Formic acid and Methanoic Acid

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