NSO Level 1- Science Olympiad (SOF) Class 10: Questions 794 - 798 of 986

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Question number: 794

» Chemical Reactions and Equation

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MCQ▾

Question

Which of the following is not a chemical reaction?

Choices

Choice (4) Response

a.

Ice melting

b.

Petrol burning in a car

c.

Steam forming on cold windows

d.

None of the above

Question number: 795

» Magnetic Effects of Electric Current

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MCQ▾

Question

To find the direction of Magnetic field which rule is used?

Choices

Choice (4) Response

a.

Right hand thumb Rule

b.

Left hand Rule

c.

Right hand Rule

d.

All of the above

Question number: 796

» Metals and Non - Metals

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MCQ▾

Question

In addition to lead, Solder also contains

Choices

Choice (4) Response

a.

Zinc

b.

Aluminum

c.

Tin

d.

Lead

Question number: 797

» Acids, Bases and Salts

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MCQ▾

Question

A teacher gave two test tube, one containing water and the other containing , to the student and asked them to identify the test tube containing solution. Which of the following can be used for the identification?

Choices

Choice (4) Response

a.

Blue litmus

b.

Red litmus

c.

None of the above

d.

Question does not provide sufficient data or is vague

Question number: 798

» Chemical Reactions and Equation

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MCQ▾

Question

Two students noted the initial colour of the solutions kept in breakers, after inserting rods in each solution and leaving it undisturbed for two hours, the colour of each solution was again noted.

The observation for the chemical reaction

The Observation for the Chemical Reaction

The observation for the chemical reaction

They recorded their observations in the form of table given below:

Table of the metal observation

Table of the metal observation

Student

Colour of the solution

A

Initial

Final

Colorless

Colorless

Colorless

Colorless

Colorless

Colorless

Colorless

Colorless

B

Initial

Final

Colorless

Colorless

Light Green

Colorless

Colorless

Colorless

Blue

Reddish brown

Which student noted the color change in all the two beakers correctly?

Choices

Choice (4) Response

a.

B student

b.

A student

c.

None of the above

d.

All of the above