Question

In a molecule of ethyne, how many electron pairs are involved in the bonding between carbon-carbon atoms?
1 point
A. 2
B. 3
C. 4
D. 6
Which of the following statements about the behaviour of gases is FALSE?
1 point
A. Gases are easily compressed.
B. Gases occupy all available space.
C. Gas particles possess orderly arrangement.
D. Gas particles possess very high kinetic energy.
A teacher asks a student to dissolve 2.5 g of sodium carbonate in 50 g of water. What will bethe concentration of the prepared solution?
1 point
A. 4.76%
B. 5.00%
C. 47.6%
D. 95.2%
A scientist prepares 0.125 M sodium chloride stock solution. What volume of the stock solutionis required to prepare a 100 mL dilute solution of 0.05 M?
1 point
A. 20 mL
B. 40 mL
C. 60 mL
D. 100 mL
Which of the following represents the formula mass of ammonium ion?
1 point
A. 15
B. 16
C. 17
D. 18
Which of the following types of bond is formed when a metal reacts with a non-metal?
1 point
A. Ionic
B. Metallic
C. Covalent
D. Coordinate covalent
Which of the following processes involves the increase of kinetic energy of molecules of a liquid by heating?
1 point
A. Condensation
B. Evaporation
C. Sublimation
D. Melting
Which of these action(s) will cause more sugar to dissolve in a saturated solution? I. Add more sugar while stirring. II. Heat the solution while adding more sugar. III. Grind the sugar to a powder; then add while stirring.
1 point
A. II only
B. I and II only
C. III only
D. II and III only
Which of the following products is obtained in the given word equation? Metal + Oxygen → ?
1 point
A. Metal ion
B. Metal oxide
C. Metal hydroxide
D. Metal oxide + Hydrogen
Which type of chemical reactionoccurs when zinc metal reacts withdilute sulphuric acid?
1 point
A. Addition reaction
B. Decomposition reaction
C. Displacement reaction
D. Double displacement
Option 1
Please solve it fast

Answer 1

Explanation:

point

A. Addition reaction

B. Decomposition reaction

C. Displacement reaction

D. Double displacement

Option 1

Please solve it fast

Answer 2

Answer:

1.3

Explanation:

because it's ask about electron pair not no of electron