Consider the situation shown in the figure. Both the pulleys and t

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Class 11 Chemistry Gases & Solutions States of Matter

Consider the situation shown in the figure. Both the pulleys and the string are light and all the surfaces are smooth.
(a) Find the acceleration of 1kg block.
(b) Find the tension in the string.

Solution:

Given,

Two blocks of mass

1 k g, 2 k g

So,

m a - 2 T = 0

m a = 2 T

T = \frac{m a}{2}

Since

T + m a - m g = 0

\frac{m a}{2} + m a - m g = 0

3 m a = 2 m g

a = \frac{2}{3} g

Thus the accelerationn of

1 k g

box is

\frac{2}{3} g

Now,

B) The tension in the string is:

\frac{m a}{2} = \frac{2 \times 2}{3} g

= \frac{4}{3} g

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The ionic radii of

A^{+}

and

B^{-}

ions are

0.98 \times 10^{- 10} m

and

1.81 \times 10^{- 10} m

.The coordination number of each ion in

A B

is :

Under which of the following sets of conditions is a real gas expected to deviate from ideal behavior?
(I) High pressure, small volume.
(II) High temperature, low pressure.
(III) Low temperature, high pressure

A large ship can float but a steel needle sinks because of

Assertion :The lowest hypothetical or imaginary temperature at which gases are supposed to occupy zero volume is called absolute zero.
Reason :Volume of the gas at

- 273.1 5^{\circ} C

becomes zero i.e. gas does not exist at this temperature.

If we plot volume of a certain mass of a gas against temperature at constant pressure, we get a straight line intersecting on the negative side at

- 27 3^{\circ} C

which explains about absolute zero. This graph is known as:

The gas which always shows positive deviation from ideal behavior at room temperature is

Which of the following statements regarding defects in crystalline solids is correct?

Assertion :Smaller the droplets of water, spherical they are.
Reason :Force of surface tension is equal, and opposite to force of gravity.

The ionic radii of

A^{+}

and

B^{-}

ions are

0.98 \times 10^{- 10} m

and

1.81 \times 10^{- 10} m

.The coordination number of each ion in

A B

is :

A large ship can float but a steel needle sinks because of

Assertion :The lowest hypothetical or imaginary temperature at which gases are supposed to occupy zero volume is called absolute zero.
Reason :Volume of the gas at

- 273.1 5^{\circ} C

becomes zero i.e. gas does not exist at this temperature.

If we plot volume of a certain mass of a gas against temperature at constant pressure, we get a straight line intersecting on the negative side at

- 27 3^{\circ} C

which explains about absolute zero. This graph is known as:

The gas which always shows positive deviation from ideal behavior at room temperature is

Which of the following statements regarding defects in crystalline solids is correct?

Assertion :Smaller the droplets of water, spherical they are.
Reason :Force of surface tension is equal, and opposite to force of gravity.

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