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Question 4451

The chlorinated alkane often used industrially to remove grease is?

Options

A)
Tetrachloromethane
B)
Chloromethane
C)
Trichloromethane
D)
Dichloromethane
Comments (1)

Question 4452

What mass of water is produced when 8.0g of hydrogen reacts with excess oxygen?

Options

A)
8.0g
B)
16.0g
C)
36.0g
D)
72.0g
Comments (1)

Question 4453

Proteins in acid solution undergo?

Options

A)
Substitution
B)
Fermentation
C)
Hydrolysis
D)
Polymerisation
Comments (1)

Question 4454

The general formula for the Alkanals is?

Options

A)
R\(_2\)CO
B)
RCHO
C)
ROH
D)
RCOOR
Comments (1)

Question 4455

When cathode rays are deflected onto the electrode of an electrometer, the instrument becomes?

Options

A)
Bipolar
B)
Negatively charged
C)
Positively charged
D)
Neutral
Comments (1)

Question 4456

When a solid substance disappears completely as a gas on heating, the substance is said to have undergone?

Options

A)
Sublimation
B)
Crystallization
C)
Distillation
D)
Evaporation
Comments (1)

Question 4457

An electron can be added to a halogen atom to form a halide ion with?

Options

A)
8 valence electrons
B)
7 valence electrons
C)
2 valence electrons
D)
3 valence electrons
Comments (1)

Question 4458

Aluminum hydroxide is used in the dyeing industry as a?

Options

A)
Dye
B)
Dispersant
C)
Salt
D)
Mordant
Comments (1)

Question 4459

The most important element on the earth's crust is?

Options

A)
Nitrogen
B)
Hydrogen
C)
Oxygen
D)
Fluorine
Comments (1)

Question 4460

To obtain pure carbon(ii)oxide from its mixture with carbon(iv)oxide, the mixture should be?

Options

A)
Passed over heated copper(ii)oxide
B)
Bubbled through water
C)
Bubbled through conc H\(_2\)SO\(_4\)
D)
Bubbled through conc NAOH
Comments (1)