Journey with Science

How many chromosomes are the there in the human somatic cells?

• 23

• 25

• 30

• 46

• 50

When a leaf is warmed for some times inside a boiling tube containing some alcohol, it becomes .

• red in colour

• black in colour

• softened

• dark green in colour

• yellowish in colour

When A is added to iodine solution the mixture turns blue in colour. A is a solution of .

• mineral salts

• sugar

• protein

• fats

• starch

Which of the following organ is not involved in digestion?

• stomach

• duodenum

• liver

• kidney

• pancreas

A container contains 20 cm³ of air. What is the volume of air in the container?

• 4 cm³

• 5 cm³

• 8 cm³

• 16 cm³

• 20 cm³

Generally, what kind of gas used in neon lights?

• nitrogen

• neon

• krypton

• nickel

• chlorine

The unit of surface:

If 1 m² = 1 cm² , so the 1 cm²= .

• 1m²

• 0.01m²

• 0.001m²

• 0.0001m²

• 0.00001m²

The density of copper is 8.9 x 10kg m^-3 , It means that .

• The density of steel per m³ is 8.9 x 10³ kg

• The mass of copper per m³ is 8.9 x 10³ kg

• The mass of steel per m³ is 8.9 x 10³ kg m^-3

• The weight of copper per m³ is 8.9 x 10³ kg

• The density of copper per m³ is 8.9 x 100³ kg