Home
Class 7
BIOLOGY
Perfumes are...

Perfumes are

A

airborne allergens

B

contact allergens

C

both airborne and contact allergens

D

none of these

Text Solution

AI Generated Solution

Promotional Banner

Topper's Solved these Questions

  • ALLERGY

    ICSE|Exercise EXERCISES (C.WRITE . TRUE. OR .FALSE.. IF FALSE, WRITE THE CORRECT STATEMENT.)|10 Videos

  • ALLERGY

    ICSE|Exercise EXERCISES (D.MATCH THE FOLLOWING)|1 Videos

  • ALLERGY

    ICSE|Exercise EXERCISE (F.EXPLAIN IN BRIEF.)|4 Videos

  • CLASSIFICATION OF THE LIVING WORLD

    ICSE|Exercise Exercises(Explain in brief.)|12 Videos

Similar Questions

Explore conceptually related problems

Fill in the blanks with suitable words : ............. are sweet smelling compounds used in perfumes and flavoured drinks.

A shopkeeper sells three varieties of perfumes and he has a large number of bottles of the same size of each variety in his stock. There are 5 places in a row in his showcase.The number of different ways of displaying the three varieties of perfumes in the show case is

Ambergris , a source of perfume , is intestinal excretion of

The smell of perfume spreads over the room due to the property called...............

Esters are sweet-smelling substances and are used in making perfumes. Suggest some activity and the reaction involved for the preparation of an ester with well labelled diagram.

The constant motion and high velocities of gas particles lead to some important practical consquences. One such consquences is that gases mix rapidly when they come in contact. Take the stopper off a bottle of perfume, for instance, and the odour will spread rapidly through the room as perfume molecules mix with the molecules in the air. This mixing of different gases by random molecular motion and with frequent collision is called diffusion. A similar process in which gas molecules escape without collision through a tiny hole into a vacuum is called effusion. Both the processes follow Graham's law which is mathematically put as r prop sqrt(1//d) . The average distance travelled by molecules between successive collisions is called mean free path. Answer the following questions on the basis of the above information: Select the correct statement(s).

The constant motion and high velocities of gas particles lead to some important practical consquences. One such consquences is that gases mix rapidly when they come in contact. Take the stopper off a bottle of perfume, for instance, and the odour will spread rapidly through the room as perfume molecules mix with the molecules in the air. This mixing of different gases by random molecular motion and with frequent collision is called diffusion. A similar process in which gas molecules escape without collision through a tiny hole into a vacuum is called effusion. Both the processes follow Graham's law which is mathematically put as r prop sqrt(1//d) . The average distance travelled by molecules between successive collisions is called mean free path. Answer the following questions on the basis of the above information: The stop cocks of the bulbs X (containing NH_(3) ) and Y (containing HCl ), both under indentical conditions, are opened simultaneously. White fumes of NH_(4)Cl , are formed at point B . If AB=36.5 cm , then BC is approximately

A perfume yielding member of family Poaceae is

Which of the following is not used as flavouring agent in perfumes ?

Why does our palm feel cold when we put some acetone or petrol or perfume on it?