Question # 1

Growth of microorganisms canbe controlled by

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Dehydration

Drying

Adding preservative

a,b,c all

The bulb of the thermometer is filled with.

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Oil

Alcohol

Water

Salt

An object produce a sound with a frequency of 50 Hz. Find its tiem period.

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0.01 sec

0.03 sec

0.02 sec

0.04 sec

The products of respiration are carbon dioxide and.

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Water

Oxygen

Mitochondria

Chloroplast

Which of the following is used to kill germs.

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Acetic acid

Brine

Sanitizrsr

Soda

A solution to which no more solute can be dissolved at a particular temperatureis called.

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Dilute solution

Concentrated solution

Saturated solution

Unsaturated solution

Aerobic respiation takes place in.

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Mitochondria

Chloroplast

Nucleus

Blood vessels

Bacteria move with the help of.

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DNA

Legs

Arm

Flagella

Trachea divides into two

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Bronchi

Veins

Villi

Ribs

The charge present on atom is

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Positive

Negative

Both a and b

Neutral

Which one of the following statements is correct.

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1 m = 1000 km

m/s is the unit of displacement.

N is the unit of force

1 h = 60 s

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