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 Chemistry Questions

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Q:

Which of the following is not soluble in water?

A) sodium chloride B) potassium sulfate
C) copper(II) hydroxide D) silver nitrate
 
Answer & Explanation Answer: B) potassium sulfate

Explanation:

We know that,

All nitrates are soluble in water.

All chlorides are soluble in water with the exception of those formed with silver , lead , mercury ions as all halides are soluble.

Sulphates are soluble in water.

Hydroxides are not soluble in water.

 

Hence, copper(II) hydroxide is not soluble in water.

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2 1972
Q:

Is boiling water a chemical change?

Answer

No. Boiling water is not a chemical change. Because in this process it doesn't loss its properties. It just changes its state i.e, from liquid state to gaseous.


 


Hence, Boiling water is a Physiacl change and not a chemical change.

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Subject: Chemistry Exam Prep: AIEEE , Bank Exams , CAT , GATE
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0 1969
Q:

Which statement is true of all atoms that are anions?

A) The atom has more electrons than protons B) The atom has more protons than electrons
C) The atom has equal number of protons and electrons D) All of the above
 
Answer & Explanation Answer: A) The atom has more electrons than protons

Explanation:
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0 1960
Q:

Chlorine gas is used in the manufacture of:

A) Baking powder B) Bleaching powder
C) Baking soda D) Washing soda
 
Answer & Explanation Answer: B) Bleaching powder

Explanation:
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1 1959
Q:

A yellow element that stinks when burned

A) Bromine B) Sulphur
C) Chlorine D) Fluorine
 
Answer & Explanation Answer: B) Sulphur

Explanation:

A yellow element that stinks when burned is Sulphur.

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1 1957
Q:

Butter is colloid formed when

A) Proteins are dispersed in water B) Water is dispersed in fat
C) Fat globules are dispersed in water D) Carbohydrates are dissolved in water
 
Answer & Explanation Answer: C) Fat globules are dispersed in water

Explanation:
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1 1957
Q:

What temperature is considered freezing?

Answer

We have all been taught that water freezes at 32 degrees Fahrenheit, 0 degrees Celsius, 273.15 Kelvin. That's not always the case, though. Scientists have found liquid water as cold as -40 degrees F in clouds and even cooled water down to -42 degrees F in the lab.

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2 1955
Q:

The chemical name of common salt is

A) Sodium Chloride B) Potassium Nitrate
C) Sodium Nitrate D) Potassium Chloride
 
Answer & Explanation Answer: A) Sodium Chloride

Explanation:

The chemical name of common salt is Sodium Chloride with a chemical formula NaCl.

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2 1948