Introduction to Water

Q. An organic compound on analysis gave the following data : C=57.82%, H=3.6% and 38.58% is oxygen Find the empirical formula.

Q.

Is sugar an element, compound or mixture?

Q.

In water, the mass ratio of hydrogen to oxygen is always 1:8.

1. True

2. False

Q. A gas is found to contain 2.34g of nitrogen and 5.34g of oxygen. What is the simplest formula of the compound?

Q. What are the three forms that water can exist in?

1. Solid
2. Liquid
3. Gas
4. Plasma

Q.

Why is water called the universal solvent?

Q.

The following table gives the difference between elements and compounds. Which of the given difference is incorrect?

1. 2

2. 3

3. 4

4. 1

Q. An organic compound contains 13% h2 52.2% carbon. If vd is 23 derive molecular formula of compound

Q.

Why water's ratio is 1:8??

Q.

Water is called the universal solvent.

1. True

2. False

Q.

Why is water very precious for all living beings ?

Q.

Which of the following is a universal solvent?

1. Water
2. Benzene
3. Toluene
4. Carbon disulphide

Q.

Why is water called universal solvent?

Q.

"Water is a universal solvent."
Which of the following statements does not support the above quotation?

1. It has a very low dielectric constant

2. It has a high liquid range

3. None of these

4. It can dissolve maximum number of compounds

Q.

Name the two gases from which water is formed. What is the chemical composition of these two gases in water ? Give the molecular formula of water.

Q.

How many moles of Helium weigh equal to the mass of 1 mole of Oxygen molecule?

1. 16
2. 2
3. 4
4. 8

Q.

The molecular mass of oxygen is 32. What does this indicate?

1. The molecule of oxygen is 32 times lighter than that of C-12 atom.

2. The molecule of oxygen is 32 times heavier than C-12 atom.

3. The molecule of oxygen is 32 times lighter thanof a C-12 atom.

4. The molecule of oxygen is 32 times heavier thanof a C-12 atom.

Q.

The human body contains water up to ___ .

1. 90%

2. 40%

3. 60%

4. 80%

Q.

Why is water known as the universal solvent?

Q.

What is the percentage of water on an average that a living organism have?

Q. Which among the following is known as "The Universal Solvent"?

1. Sodium Chloride
2. Water
3. Zinch Chloride
4. Hydrogen Chloride

Q.

What is the name of compound-

Hg₂I₂

Q.

Next to air ___________ is the most important substance.

Q. What is aliphatic compound

Q.

15. Write the name of the liquid which is called as universal solvent. Write reason also.

Q.

Why is water called a universal solvent?

Q.

Give reason:

Water is called a universal solvent.

Q. What is empirical formula of a compound containing 50.1% sulphur and 49.9% oxygen by Mass?

Q.

2. Can a compound be made up of one atom?

Q.

Why is water known as universal solvent?