Question # 1

Density of water at 4°C is:

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0.976 gem-3

1 gem-3

0.956 gem-3

1.1 gem-3

Which process is responsible for ascending of water in plants from roots to leaf?

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Condensatin

Transpiration

Capillary action

Evaporation

Specific Heat capacity of water is about.

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4.0 Jg^-1 K^-1

4.1 Jg^-1K^-1

4.2 Jg^-1K^-1

4.3 Jg^-1K^-1

Temporary hardness is removed by adding.

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Quick lime

Slaked lime

Lime stone

Lime water.

Which of the following in soluble in water.

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Organic acids

Glucose

Alcohal

All of them

Temporary hardness of water is removed by adding.

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Ca(OH)₂

NaOH

KOH

CaSO₄

Which ion cause water hardness?

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Al²

Mg²

Fe²

Na²

Calcium carbonate is in water.

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Insoluble

Sparingly

None of them

Soluble

Which one of the following salts makes the water permanently hard?

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NaCO₃

NaHCO₃

CA(HCO₃)₂

CaSO₄

The surface tension of water is:

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very low

moderate

high

zero

Salt makes the water permanently hard.

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CaSO₄

Ca(HCO₃)₂

NaHCO₃

NaCO₃

Which process is responsible for ascending of water in roots:

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evaporation

transpiration

condensation

capillary action

Ionic compounds are soluble in water due to:

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Hydrogen bonding

ion-dipole forces

Dipole-dipole forces

Dipole -induced dipole forces

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