Chemistry NABTEB exam past questions and answers

Chemistry NABTEB exam past questions and answers

Here they are;

Question: What is the atomic number of carbon?

A) 6

B) 12

C) 14

D) 16

Answer: A) 6

Question: Which of the following elements is a noble gas?

A) Oxygen

B) Neon

C) Sodium

D) Chlorine

Answer: B) Neon

Question: What is the chemical symbol for gold?

A) Ag

B) Au

C) Fe

D) Pb

Answer: B) Au

Question: How many valence electrons does nitrogen have?

A) 2

B) 5

C) 7

D) 8

Answer: C) 7

Question: What is the pH of a neutral solution?

A) 0

B) 7

C) 14

D) 10

Answer: B) 7

Question: Which type of bond involves the sharing of electrons between atoms?

A) Ionic

B) Covalent

C) Metallic

D) Polar

Answer: B) Covalent

Question: What is the chemical formula for water?

A) H2O

B) CO2

C) CH4

D) O2

Answer: A) H2O

Question: In a chemical reaction, what does the arrow symbol (→) represent?

A) Addition

B) Subtraction

C) Equals

D) Yield

Answer: D) Yield

Question: Which gas is responsible for the greenhouse effect?

A) Oxygen

B) Carbon dioxide

C) Nitrogen

D) Hydrogen

Answer: B) Carbon dioxide

Question: What is the formula for methane?

A) CH4

B) CO2

C) H2O

D) N2

Answer: A) CH4

Question: How many protons are in the nucleus of an oxygen atom?

A) 6

B) 8

C) 16

D) 18

Answer: B) 8

Question: Which is the lightest noble gas?

A) Helium

B) Neon

C) Argon

D) Krypton

Answer: A) Helium

Question: What is the chemical symbol for sodium?

A) Na

B) S

C) Ni

D) Sn

Answer: A) Na

Question: What is the main component of natural gas?

A) Methane

B) Ethane

C) Butane

D) Propane

Answer: A) Methane

Question: Which element is essential for life and forms the basis of organic chemistry?

A) Nitrogen

B) Carbon

C) Oxygen

D) Hydrogen

Answer: B) Carbon

Question: What is the formula for sulfuric acid?

A) HCl

B) H2SO4

C) NaOH

D) KOH

Answer: B) H2SO4

Question: How many electrons are in the outermost shell of an atom in the ground state?

A) 1

B) 2

C) 8

D) 18

Answer: C) 8

Question: What is the common name for the reaction between an acid and a base?

A) Oxidation

B) Reduction

C) Neutralization

D) Hydrolysis

Answer: C) Neutralization

Question: Which gas is produced during photosynthesis?

A) Oxygen

B) Carbon dioxide

C) Nitrogen

D) Hydrogen

Answer: A) Oxygen

Question: What is the chemical formula for table salt?

A) NaCl

B) KCl

C) CaCl2

D) MgCl2

Answer: A) NaCl