Properties of Water

Q.

Calculate the molar mass of oxalic acid (C = 12u, O = 16u, H = 1u)

Q. ntpolonium adopts cubic structure with edge length of cube being o.336nm.the distance between the polonium atoms which lie at the corners along the body diagonal?n

Q.

QUESTION 2.25(i)

Among the following compounds, identify which are insoluble, partially soluble and highly soluble in water?

(i) Phenol

(ii) Toluene

(iii) Formic acid

(iv) Ethylene glycol

(v) Chloroform

(vi) Pentanol

Q.

Eqimolar solutions of these are prepared separetely which one of these will record highest value of ph and WHY( with proper scientifical explanations)?

1)BaCl₂

2)AlCl₃

₃₎LiCl

₄₎BeCl₂

Q.

What do you call a liquid turning into a solid?

Q.

State five qualities of potable water.

Q.

Most soluble in water is (A) camphor (B) sulfur (C) common salt (D) sugar

1. Camphor

2. Sulphur

3. Common salt

4. Sugar

Q. 20. The solution having minimum boiling point is 1) 0.1M C6H12O6 2) 0.1M NaCl 3) 0.1M CaCl2 4) 0.5M AlCl3

Q.

In which of the following, the identity of the initial substance remains unchanged?

1. Curdling of milk

2. Formation of crystals by process of crystallization

3. Fermentation of grapes

4. Digestion of food

Q.

What is meant by ‘demineralised’ water and how can it be obtained?

Q. What is the physical state of water at ${100}^{\circ }C$?

Q. What is the physical state of water at $0^{\circ }C$?

Q.

In three-dimensional solid $Si{O}_2$, hybridization of Si is:

1. 

2. 

3. 

4. 

Q.

What type of oxides are formed when non-metals react with oxygen? Explain with an example.

Q.

Pure water does not conduct electricity because it is_____?

1. Neutral

2. Almost Unionized

3. Completely Unionized

4. Readily Decomposed.

Q.

Write chemical reactions to show the atmospheric nature of water.

Q.

How is Potassium Used in Everyday Life?

Q. ${10}^{-6}$ M NaOH is diluted 100 times. The pH of the diluted base is

1. Between 5 and 6
2. Between 7 and 8
3. Between 6 and 7
4. Between 10 and 11

Q. High boiling point of water is due to

1. Its high specific heat
2. Hydrogen bonding
3. High dielectric constant
4. Low dissociation constant

Q.

Write two examples of deliquescent substance

Q.

Give reason why aquatic animals are able to survive in severe winter?

Q. An ionic compound is dissolved simultaneously in heavy water and simple water. Its solubility is:

1. Large in heavy water
2. Smaller in simple water
3. Same in both
4. Smaller in heavy water

Q.

The bubbles produced when water boils contain

1. air

2. water

3. vacuum

4. steam

Q.

Which is the gas used for making vegetables and vanaspati from vegetable oils?

Q. High boiling point of water is due to

1. Its high specific heat
2. Hydrogen bonding
3. High dielectric constant
4. Low dissociation constant

Q.

Pure distilled water is a good conductor of electricity - True or False?

1. True

2. False

Q.

Quartz is:

1. Covalent solid

2. Metallic solid

3. Molecular solid

4. Ionic solid

Q. The density of ice at 0 degree centigrade is 0.915g/cc and that of liquid water at 0 degree centigrade is 0.99987 g/cc. The work done for melting 1 mole of ice at 1.00 bar ( assuming work is done only due to expansion) is approximately
a) 0.17 J
b) 1.7 × 1000 J
C)0.000017 J

Q.

Choose the hydrate which exhibit Hydrogen bonding.

1. CuSO₄.5H₂O

2. BaCl₂.2H₂O

3. CrCl₂.6H₂O

4. All of the above

Q.

What kind of matter is sand?