Question # 1

Boiling point of water is:

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0^oC

25^oC

80^oC

100^oC

A disease is caused by excess of bile pigments in the blood is.

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Typhoid

Jaundice

Cholera

Dysentery

How many times the heat capacity of water is greater than that of rocks.

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Two

Three

Four

Six

The bond angle between H-O-H in water is:

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104.5^o

104.6^o

104.7^o

104.8^o

The boiling point of water is.

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100^oC

4^oC

0^oC

25^oC

Specific heat capacity of water is.

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4.2 KJg^-1 K^-1

4.2 Jg^-1K^-1

2.4 KJg^-1K^-1

2.4 Jg^-1K^-1

Ionic compounds are soluble in water due to:

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Hydrogen bonding

ion-dipole forces

Dipole-dipole forces

Dipole -induced dipole forces

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 salt cause permanent hardness in water is:

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Ca(HCO₃)₂

Mg(HCO₃)₂

CaCl₂

KCl

Sodium zeolite is naturally occurring reason of .

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NaAl (SiO₃)₂

Na₂CO₃

CaCO₃

Na₂SIO₃

Which one of the following disease causes severe diarrhea and can be fatal:

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Jaundic

Dysentery

Cholera

Typhoid

Which gas is used to destroy harmful bacteria in water?

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Iodine

Chlorine

Flourine

Bromine

Mg²⁺ and Ca²⁺ ions react with soap to form calcium and magnesium salts of fatty acids called.

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Gelatin

Scum

Paste

None of them

Hook warm larvae enter the body through.

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Food

Water

Skin

All of them

Freezing point of water is:

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-4°C

0°C

-36°C

-58°C

Hook worm infects.

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Liver

Small intestine

Large intestine

Stomach

Which is not a heavy metal.

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Cadmium

Lead

Zinc

Murcury

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