Chemistry [NSTSE (National Science Talent Search Exam- Unified Council) Class 9]: Questions 138 - 146 of 208

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Question number: 138

» Chemistry » Structure of the Atom

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MCQ▾

Question

The mass of photon having wavelength in?

Choices

Choice (4)Response

a.

b.

c.

d.

Question number: 139

» Chemistry » Atoms & Molecules

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MCQ▾

Question

Which of the following in known to be Avogadro number?

Choices

Choice (4)Response

a.

b.

c.

d.

Question number: 140

» Chemistry » Atoms & Molecules

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Question

Calculate the weight of moles of magnesium nitrate?

Choices

Choice (4)Response

a.

b.

c.

d.

Question number: 141

» Chemistry » Matter

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Question

What observation will be found when a solid melts?

Choices

Choice (4)Response

a.

The movement of its molecules decreases

b.

The temperature decreases although heat is supplied

c.

Molecular move closer

d.

Its molecules move further apart

Question number: 142

» Chemistry » Atoms & Molecules

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Question

What is the molecular weight of and oxidation number of aluminum ?

Choices

Choice (4)Response

a.

b.

c.

d.

Question number: 143

» Chemistry » Atoms & Molecules

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Question

Which of the following in exact molar mass of sodium Hydroxide

Choices

Choice (4)Response

a.

b.

c.

d.

Question number: 144

» Chemistry » Atoms & Molecules

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MCQ▾

Question

Which of the following complex ions is not a divalent ion?

Choices

Choice (4)Response

a.

Sulphate

b.

Nitrate

c.

Carbonate

d.

Sulphite

Question number: 145

» Chemistry » Atoms & Molecules

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MCQ▾

Question

Calculate the mass of molecule of sulphuric acid

Choices

Choice (4)Response

a.

b.

c.

d.

Question number: 146

» Chemistry » The Nature of Matter

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MCQ▾

Question

Which type of molecules from micelles?

Choices

Choice (4)Response

a.

Any of these

b.

Surfactant molecules

c.

Polar molecules

d.

Non-polar molecules

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