Grade 9 Science Quiz Bee (Easy Round)

This is the passageway for air between the pharynx above and the trachea below and most known as voice box.

(a)  

What is the shape of the covalent compound Arsenic pentabromide (AsBr5) (V.E. of As= 5; V.E. of Br= 7)

• Tetrahedral

• Trigonal Planar

• Trigonal bipyramidal

• Octahedral

What is the steric number of Xenon tetrafluoride (XeF4)? (Type the number form of the answer)

(a)  

It serves as the opening to the respiratory tract.

(a)  

What is the chemical name of the product of Haber-Bosch process?

(a)  

A segment of the DNA that serves as a unit of heredity.

(a)  

An experimenter needs to prepare 0.5 moles of Ammonia (NH3). How many grams of Ammonia does the experimenter need? (MM of NH3= 17 g/mol )

(Reminder: Round off your answer to the nearest hundredths and supply it with proper unit.)

(a)  

The main organ for respiration.

(a)  

Which of the following numbers of pi electrons does not follow Huckel’s rule?

• 14 pi electrons

• 22 pi electrons

• 24 pi electrons

• 26 pi electrons

This structure acts like a trap door to keep food and other particles from entering the larynx.

(a)