NSTSE (National Science Talent Search Exam- Unified Council) Class 10: Questions 1397 - 1405 of 1484

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Question number: 1397

» Chemistry » Acids, Bases and Salts

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Question

………. defined the scale.

Choices

Choice (4) Response

a.

Somerfield

b.

Arrhenius

c.

Bohr

d.

Sorenson

Question number: 1398

» Chemistry » Acids, Bases and Salts

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Question

What would be the value of a solution, when it turns blue litmus to red litmus?

Choices

Choice (4) Response

a.

8

b.

10

c.

9

d.

6

Question number: 1399

» Chemistry » Acids, Bases and Salts

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Question

Which of the following acid dissociates when dissolved in water?

Choices

Choice (4) Response

a.

An oxalic acid

b.

A hydra acid

c.

A weak acid

d.

A strong acid

Question number: 1400

» Chemistry » Acids, Bases and Salts

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Question

Which of the following acid is present in apple majorly?

Choices

Choice (4) Response

a.

Tartaric acid

b.

Malic acid

c.

Citric acid

d.

Formic acid

Question number: 1401

» Chemistry » Chemical Reactions and Equations

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Question

When Copper metal reacts with nitric acid what will be the product formed?

Choices

Choice (4) Response

a.

b.

c.

d.

Question number: 1402

» Chemistry » Periodic Classification of Elements

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MCQ▾

Question

The maximum ionization enthalpy in a period is shown by?

Choices

Choice (4) Response

a.

Chalcogens

b.

Halogens

c.

Inert gases

d.

Alkali metal

Question number: 1403

» Chemistry » Periodic Classification of Elements

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Question

The electronegativity of are in the order of?

Choices

Choice (4) Response

a.

N > Si > C > P

b.

Si < P < C < N

c.

Si > P > C > N

d.

P > N > Si > C

Question number: 1404

» Chemistry » Periodic Classification of Elements

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MCQ▾

Question

An element of atomic number 29 belongs to?

Choices

Choice (4) Response

a.

p block

b.

d block

c.

f block

d.

s block

Question number: 1405

» Chemistry » Periodic Classification of Elements

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MCQ▾

Question

The order of screening effect of the electrons of s, p, d and f orbitals of given shell of an atom on its outer shell electron is?

Choices

Choice (4) Response

a.

b.

c.

d.

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