Units and Dimensions

Q.

• What is absolute temperature?

Q. The mass of 112 $c{m}^3$ of $C{H}_4$ at STP is

1. 0.16 g
2. 0.8 g
3. 0.08 g
4. 1.6 g

Q.

Explain the working principle of a thermometer.

Q.

How many joules are there in one-kilowatt hour?

Q.

One newton is equivalent to​ ______

Q.

If effective nuclear charge of F(Z=9) is X and effective nuclear charge of Li (Z=3) is Y then find the value of |X-Y|

Q.

How $432$ seconds is equal to $7$ minutes $12$ seconds ?

Q.

Define limiting molar conductivity. Why conductivity of an electrolyte solution decreases with the decrease in concentration?

Q.

Calculate the mass of a silver atom.(Atomic weight of Ag=108)

Q.

Mention the S.I unit for molar conductivity.

Q.

Describe picometer

Q.

How many centimeters make a kilometer?

Q.

Why negative value cant be in case of kelvin scale?

Q.

$1$ millennium is equal to how many years?

Q.

What is the density of wet air with 75% relative humidity at 1 atm and 300 K? Given :vapour pressure of $H_{2}O$ is 30 torr and average molar mass of air is 29 g $mo{l}^{-1}$.

1. 2.614 g/L

2. 0.96 g/L

3. 1.06 g/L

4. 1.164 g/L

Q.

If the mass of an object is 2 kg, its weight on Earth will be ________

Q.

Which of the following is not an extensive property?

1. Molarity

2. Heat capacity

3. Mass

Q.

The normal temperature of human on Kelvin scale is:

1. 280

2. 290

3. 300

4. 310

Q. The following solutions were prepared by dissolving 10g of glucose $\left(C_6{H}_{12}{O}_6\right)$ in 250ml of water $\left(P_1\right)$ 10g of urea $\left(C{H}_4{N}_{2}O\right)$ in 250ml of water $\left(P_2\right)$ and 10g of sucrose $\left(C_{12}{H}_{12}{O}_{11}\right)$ in 250ml of water $\left(P_3\right)$. The right option for the decreasing order of osmotic pressure of these solutions is:

1. $P_3>P_1>P_2$
2. $P_2>P_3>P_1$
3. $P_1>P_2>P_3$
4. $P_2>P_1>P_3$

Q.

What is Mole Percent?

Q.

What is the unit for molecular weight?

Q.

The density of mercury is $13.6\mathrm{gm}/\mathrm{cc}$convert into SI units.

Q.

At what temperature the reading on Kelvin scale is three times that on Celsius scale

Q.

Two students performed the same experiment separately and each one of them recorded two readings of mass which are given below. Correct reading of mass is 3.0 g. On the basis of given data, mark the correct option out of the following statements

$\begin{array}{ccc}Students& & Reading\\ & \left(i\right)& \left(ii\right)\\ A& 3.01& 2.99\\ B& 3.05& 2.95\end{array}$

(a) Results of both the students are neither accurate, nor precise

(b) Results of students A are both precise and accurate

(c) Results of student B are neither nor accurate

(d) Results of student B are both precise and accurate

Q.

An electron volt is larger than a joule.

1. True
2. False

Q. How density can be an intensive property?

Q. Calculate relative rate of effusion of $O_2$ to $C{H}_4$ through a container containing $O_2$ and $C{H}_4$ in $3:2$ mass ratio.

1. $\frac{3\sqrt{2}}{4}$
2. $\frac{3}{4\sqrt{2}}$
3. $\frac{3}{2\sqrt{2}}$
4. None of these

Q. At ${100}^{\circ }$C and 1 atm, if the density of liquid water is 1.0 g/$c{m}^3$ and that of water vapour is 0.0006 g/$m^3$ , then the volume occupied by water molecules in 1 litre of steam at that temperature is

1. 6cm³
2. 60cm³
3. 0.6cm³
4. 0.06cm³

Q.

What is the physical quantity that an electron volt measures?

Q.

How to convert 0.0230554 Kelvin in to joules