EmSAT Chemistry

Question 1

What is the atomic number of carbon?

Accepted Answer

6

Answer

12

Answer

8

Answer

14

Question 2

What type of bond is formed when electrons are shared between two nonmetal atoms?

Accepted Answer

Covalent bond

Answer

Ionic bond

Answer

Metallic bond

Answer

Hydrogen bond

Question 3

What is the pH of a neutral solution at 25°C?

Accepted Answer

7

Answer

0

Answer

14

Answer

1

Question 4

How many moles of water are produced when 2 moles of hydrogen gas react with 1 mole of oxygen gas?

Accepted Answer

2 moles

Answer

1 mole

Answer

3 moles

Answer

4 moles

Question 5

Which of the following is an example of a physical change?

Accepted Answer

Melting ice

Answer

Burning wood

Answer

Rusting iron

Answer

Cooking an egg

Question 6

What is the electron configuration of sodium (Na, atomic number 11)?

Accepted Answer

1s² 2s² 2p⁶ 3s¹

Answer

1s² 2s² 2p⁷

Answer

1s² 2s² 2p⁶ 3s²

Answer

1s² 2s² 2p⁶ 3p¹