NSTSE (National Science Talent Search Exam- Unified Council) Class 6: Questions 1812 - 1819 of 2029

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Question 1812

Question

MCQ▾

What will be the color of water when calcium is gently dropped on cold water?

Choices

Choice (4)Response

a.

Turns it lime yellow

b.

Turns it red

c.

Turns it blue

d.

Turns it milky

Question 1813

Question

MCQ▾

Mercury causes disease

Choices

Choice (4)Response

a.

Minamata

b.

Brain damage

c.

Mental problem

d.

All a., b. and c. are correct

Question 1814

Question

MCQ▾

Alcohol is in water

Choices

Choice (4)Response

a.

Miscible

b.

Filtered

c.

Immiscible

d.

All of the above

Question 1815

Question

MCQ▾

Who discovered mephitic air?

Choices

Choice (4)Response

a.

Antoine Lavoisier

b.

Daniel Rutherford

c.

Joseph Priestly

d.

Question does not provide sufficient data or is vague

Question 1816

Question

MCQ▾

Why potassium kept in kerosene oil?

Choices

Choice (4)Response

a.

It turns its color

b.

It is poison

c.

It forms oxygen

d.

It catches fire

Question 1817

Question

MCQ▾

Name the gas used to fill the weather observation balloons.

Choices

Choice (4)Response

a.

Helium

b.

Hydrogen

c.

Inert Gas

d.

Nitrogen

Question 1818

Question

MCQ▾

Which of the following is an immiscible liquid?

Choices

Choice (4)Response

a.

Pure water

b.

Milk

c.

Salt water

d.

Oil

Question 1819

Question

MCQ▾

What result red hot iron react with steam?

Choices

Choice (4)Response

a.

Forms ferrous hydroxide

b.

Liberate oxygen

c.

Liberate hydrogen

d.

Forms ferric hydroxide

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