Chemistry-Physical and Chemical Changes (NTSE Stage-1 (State-Level) Scholastic-Aptitude & Language Comprehension): Questions 32 - 37 of 42

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Question number: 32

» Chemistry » Physical and Chemical Changes

MCQ▾

Question

In the presence of concentrated sulphuric acid H2SO4 , acetic acid reacts with ethyl alcohol to produce

Choices

Choice (4) Response

a.

Aldehyde

b.

Ester

c.

alcohol

d.

carboxylic acid

Question number: 33

» Chemistry » Physical and Chemical Changes

MCQ▾

Question

Arrange the following elements in order of their increasing ionization energies O, S, Se, Te, Po

Choices

Choice (4) Response

a.

O, S, Se, Te, Po

b.

Po, Te, Se, S, O

c.

Se, Te, S, Po, O

d.

Te, O, S, Po, Se

Question number: 34

» Chemistry » Physical and Chemical Changes

MCQ▾

Question

A cell is kept in a solution for sometimes, when it bursts. The solution should be

Choices

Choice (4) Response

a.

Hypotonic

b.

Hypertonic

c.

Monotonic

d.

Isotonic

Question number: 35

» Chemistry » Physical and Chemical Changes

MCQ▾

Question

The gas you use in kitchen is called Liquefied Petroleum Gas (LPG). In the cylinder, it exists as a liquid. When it comes out of the cylinder, it becomes a gas (process A), then it burns (process B).

Choose the correct statement.

Choices

Choice (4) Response

a.

processes A and B are chemical changes

b.

Process A is chemical change

c.

Process B is a chemical change

d.

All of the above

Question number: 36

» Chemistry » Physical and Chemical Changes

MCQ▾

Question

The best method to separate the dyes from ink is

Choices

Choice (4) Response

a.

Filtration

b.

Sublimation

c.

Distillation

d.

Chromatography

Question number: 37

» Chemistry » Physical and Chemical Changes

MCQ▾

Question

Electron-dot structure of F2 molecule is

Choices

Choice (4) Response

a.

Electron dot structure of F2 – Choice A

Electron Dot Structure of F2 – Choice A

Explaining the electron dot structure of Fluorine

b.

Electron dot structure of F2 – Choice B

Electron Dot Structure of F2 – Choice B

Explaining the electron dot structure of Fluorine

c.

Electron dot structure of F2 – Choice C

Electron Dot Structure of F2 – Choice C

Explaining the electron dot structure of Fluorine

d.

Electron dot structure of F2 – Choice D

Electron Dot Structure of F2 – Choice D

Explaining the electron dot structure of Fluorine

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