Density

Q. Number of water molecules in 1 litre of water

1)18 . 2)181000 3)N⁴ . 4)55.55 NA

Q.

The ratio of Boyle's temperature and critical temperature for a gas is:

1. 8/27

2. 27/8

3. 1/2

4. 2/1

Q. What is the difference between mass, volume and weight?

Q. The transition metals exhibit a ___ density than the alkali and alkaline earth metals.

Q.

Alkaline earth metals are denser than the corresponding alkali metals. Comment on the statement.

Q.

What is the mass of $22.4{\text{dm}}^3$ of the following gas at STP?

(c) chlorine

Q. _____ is the measurement of the amount of matter in a substance.

1. Volume
2. Space
3. Air
4. Mass

Q. Assertion (A) : Density of ice is less than water. Reason (R) : Density of ice is maximum at 4 C. Now, choose the correct option. (1) Both (A) and (R) are true and (R) is the correct explanation of (A) (2) Both (A) and (R) are true but (R) is not the correct explanation of (A) (3) (A) is true but (R) is false 4) (A) is false and (R) is true

Q.

Vapour density of a gas is 22. What is its inter molecular space ?

Q. The transition metals exhibit a ___ density than the alkali and alkaline earth metals.

Q. Density of water is $1000kg/m^3$.

1. False
2. True

Q. A plant virus is found to consist of uniform cylindrical particles of $150$ angstrom in diameter and $5000$ angstom long. The specific volume of virus is $0.75{cm}^3{g}^{-1}$. If the virus is considered to be a single particle, its molecular weight is :
(Given that volume of cylinder is ${\pi r}^{2}l$)

1. $7.092\times {10}^7$
2. $7.092\times {10}^6$
3. $7.092\times {10}^5$
4. $7.092\times {10}^9$

Q.

Name one metal and nonmetal that are liquid at room temperature.

Q.

At constant pressure, the volume of the fixed mass of an ideal gas is directly proportional to

1. Degree fahrenheit

2. Degree centigrade

3. Critical temperature

4. Absolute temperature

Q.

Is it possible to calculate the density of gas at standard temperature and pressure?

1. Agree

2. Disagree

3. Not enough data

4. Not sure

Q. _____ is the measurement of the amount of matter in a substance.

1. Space
2. Air
3. Volume
4. Mass

Q. $\text{CuCl}$ has a zinc blende structure. Its density is $3.4$ g cm${}^{-3}$. The length of its unit cell edge (in pm) is:

Q. The numerical value of $N/n$ (where $N$ is number of molecules in a given sample of gas and $n$ is the number of moles of the gas) is:

1. $8.314$
2. $6.02\times {10}^{23}$
3. $0.0821$
4. $1.62\times {10}^{-24}$

Q.

What is relative density? How is it different from density?

Q. Two substances with same mass, one have volume of 100ml and other having volume of 110ml . Which of the two substances is more dense?

Q. _____ is the measurement of the amount of matter in a substance.

1. Air
2. Mass
3. Space
4. Volume