Properties of natural resources - class-IX
Description: properties of natural resources | |
Number of Questions: 60 | |
Created by: Ratna Goswami | |
Tags: properties of natural resources chemistry hydrogen and its compounds hydrogen water environmental science |
The density of pure water is:
Specific heat of water is:
The density of water is:
Pure water has a pleasant taste.
Water has the maximum density at $ 0^{\circ}C$.
The boiling point of water is inversely proportional to the atmospheric pressure.
The density of water at $0^{\circ} C $ is less than the density of water at $ 4^{\circ}C $.
Ice floats over water as its density is less than that of water.
The water pipes burst in cold countries in winter due to anomalous expansion of water.
Distilled water is a good conductor of electricity.
Which property of water make it easy to contaminate and difficult to purify?
Why water is called an universal solvent?
Pure water has the maximum density at $ 4^{\circ} C.$
Which one of the following is not a physical property of water?
Which of the following types of water is not in its free state?
What is the molecular weight of water?
When water is cooled it contracts until it reaches ________ and then it starts expanding.
Which one of the following property is high in the case of water?
At 4$^{\circ}$C, water starts expanding and continues to do so till 0$^{\circ}$C.
The physical state of water is liquid at which of the following temperatures?
At what temperature ,water have maximum density?
Water acts as a powerful ionizing solvent due to its dielectric constant.
Water is cooled from $4^{\circ}C$ to $0^{\circ}C$. It will:
Water can be boiled in a paper cup.
Water is a mixture.
Pure water is a ________ conductor of electricity.
Water in its pure form is a:
Which of the following is soluble in water ?
When we heat water, we can find bubbles coming from it. This shows that:
Pure water is a ________ conductor of electricity.
Pure water is:
The water pipes burst in winter because pipes contract at low temperature.
Water exists in which of the following state?
Which of the following is a universal solvent?
Water is ______ in nature?
Ice at $0 \ ^0C$ has a lower density than water $4^{\circ}C$ and hence floats on water.
Pure water is a poor conductor of heat and electricity.
Ratio of hydrogen to oxygen in water is:
When water gets converted into ice, its volume:
By this process, water can be purified in a simple way:
Which of the following is NOT soluble in water?
Which property of water is used while washing clothes?
Statement 1: Water boils below ${100}^{o}C$ at high altitudes.
Statement 2: Atmospheric pressure varies inversely with altitude.
Temporary hardness is caused due to the presence of:
Permanent hardness is caused due to:
Water has maximum density at
Molecular mass of water ______.
During hydrate formation from aqueous solution water can be associated in different forms. Indicate the wrong combination.
Coordinated water -$[Cr(H _{2}O) _{6}]^{3+}3Cl^{-}$
Interstitial water - $BaCl _{2}.2H _{2}O$
Hydrogen bonded water --$[Cu(H _{2}O) _{4}]^{2+}SO _{4}^{2-}.H _{2}O$
A teacher one day pointed out to his students the peculiar fact that water is a unique liquid that freezes exactly at $0^oC$ and boils exactly at $100^oC$. He asked the students to find the correct statement based on this fact.
________is known as the universal solvent.
The density of water is not same at all temperatures because of its anomalous expansion. The density is maximum at:
The freezing point of water is:
Water exists in ........... state(s).
Evaporation of water is:
Ice is lighter than water as
Ice has density less that $1\ g \ cm^{-3}$.
Statement 1: Ice is less dense than liquid water.
Statement 2: Water molecules are nonpolar.
$I$. Melting is an exothermic process.
$II$. Heat energy will cause covalent bonds in water to break as water converts from the solid state to the liquid state.
Which one of the following statements about water is false?