Units and Dimensions

Q. (4) Density of agas at 300 K and 210 torr is 0.434 g/lWhat is its molar mass?

Q. In which case is number of molecules of water maximum? (1) 18 mL of water (2) 0.18 g of water (3) 10.1 mol of water (4) 0.00224 L of water vapours at 1 atm and 273k

Q. 20. What is absolute density and relative density?

Q. 46. two students X and Y report tha masses of the same substance as 7.0g and 7.00g respectively.which of the following is correct? a.both are equally correct . b.X is more accurate. c.Y is more accurate. d.both are inaccurate scientifically

Q. K, for A(g)+ B(g) 3C(g) is 30 at 298 K. If a twolitre vessel contains 1, 2 and 5 moles of A, B and Crespectively, the reaction at 298 K shall

Q.

What is the value of 4 days in seconds?

1. 345600 s

2. None

3. 364500 s

4. 354600 s

Q.

67 kg is equal to how many pounds?

Q.

The radii of $F,F^{-},O$ and $O^{-2}$ are in the order of

1. F^->O^2->F>O

2. O^2->F^->O>F

3. O^2->F^->F>O

4. O^2->O>F^->F

Q.

Fill in the blanks.

$10c{m}^2=\_\_\_\_\_\_\_\_\_\_m^2.$

Q. 21. What is a CGS Unit of Volume ?

Q. the ratio between rms speed of hydrogen at 50 Kelvin and that of oxygen at 800 kelvin is

Q. In which year law of conservation of mass proposed and implemented?

Q. 15.If specific heat of a metal is 0.16 calorie per gram its approximate atomic weight would be

Q. Calculate the number of molecules present in a gas having mass(in g) equal to vapour density.

Q. $1\text{amu}$ is equal to:

1. $\frac{1}{{14}^{\text{th}}}$ the mass of one $O-16$ atom
2. $\frac{1}{{12}^{\text{th}}}$ the mass of one $C-12$ atom
3. $1\text{g}$ of $H_2$
4. $1.66\times {10}^{-23}\text{kg}$

Q. What is meant by average atomic mass?

Q. What is law of conservation of mass?

Q.

What is the value of 8.0 km in inches?

(1 m = 1.094 yards & 1 yrd = 36 inches)

1. 3.15 $\times$ ${10}^5$

2. 3.2 $\times$ ${10}^5$

3. 3.1 $\times$ ${10}^5$

4. 3.3 $\times$ ${10}^5$

Q.

What is the value of 200 lb in kilograms?

1. 90 kg

2. 90.1 kg

3. 90.7 kg

4. 90.6 kg

Q. What is the atmospheric pressure at the sea level ?

Q.

What is 5 litres of a solution in $m^3$ ?

1. 5

2. 5

3. 5

4. 5

Q. How to calculate atomic mass

Q.

Find the sum or difference.

$(7.8\times {10}^{-5})–(4.5\times {10}^{-5})$

Q.

Convert the following

$236\text{cm to m}$

Q. 54. Density of an object is 3 gram/cm.cm.cm express it in kg/m.m.m

Q. In which year law of conservation of mass proposed and implemented?