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A teacher one day pointed out to his stu...

A teacher one day pointed out to his students the peculiar fact that water is a unique liquid which freezes exactly at `0^(@)C`.and boils exactly at `100^(@)C`. He asked the students to find the correct statement based on this fact.

A

Water dissolves anything however sparingly the dissolution may be

B

Water is a polar molecule

C

Boiling and freezing temperatures of water were used to define a temperature scale

D

Liquid water is denser than ice

Text Solution

Verified by Experts

The correct Answer is:
C
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Knowledge Check

  • Water frezes at 0^(@)C and boils at 100^(@)C . Write an inequality to show the range of temperature (t) for which water is a liquid.

    A
    `tlt0^(@)C`
    B
    `0^(@)Cle tle 100^(@)C`
    C
    `tgt100^(@)C`
    D
    `0^(@)Clt t lt100^(@)C`

  • Mathematics teacher of a school took her 10th standard students to show Red fort. It was a part of their Educational trip. The teacher had interest in history as well. She narrated the facts of Red fort to students. Then the teacher said in this monument one can find combination of solid figures. There are 2 pillars which are cylindrical in shape. Also 2 domes at the corners which are hemispherical.7 smaller domes at the centre. Flag hoisting ceremony on Independence Day takes place near these domes. Find the lateral surface area of two pillars if height of the pillar is 7m and radius of the base is 1.4m.

    A
    `112.3 cm^2`
    B
    `123.2 m^2`
    C
    `90 m^2`
    D
    `345.2 cm^2`

  • Mathematics teacher of a school took her 10th standard students to show Red fort. It was a part of their Educational trip. The teacher had interest in history as well. She narrated the facts of Red fort to students. Then the teacher said in this monument one can find combination of solid figures. There are 2 pillars which are cylindrical in shape. Also 2 domes at the corners which are hemispherical.7 smaller domes at the centre. Flag hoisting ceremony on Independence Day takes place near these domes. How much is the volume of a hemisphere if the radius of the base is 3.5m?

    A
    `85.9 m^3`
    B
    `80m^3`
    C
    `98 m^3`
    D
    `89.83 m^3`

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