chemical reaction and equation

What do you call the substances on the left side of a chemical equation?

• yield

• product

• reactant

• compound

What happens in a chemical reaction?

• Bonds between atoms break and/or are formed

• New atoms are created and/or removed

• Protons move from one atom to another

• Electrons change into protons

Tags

NGSS.MS-PS1-1

NGSS.MS-PS1-2

NGSS.MS-PS1-5

When Lead Nitrate reacts with potassium iodide, Yellow precipitate of ............. is formed

• PbI₂

• KNO₃

• Pb(NO₃)₂

• PbIO₃

Which of the following is not a thermal decomposition reaction

• 2FeSO₄ →Fe₂O₃ +SO₂ + SO₃

• 2H₂O→2H₂ + O₂

• ZnCO₃→ZnO + CO₂

• 2KClO₃→2KCl + 3 O₂

Which of the formula of rust is

• Fe₂O₃

• Fe₃O₄

• Fe₂O₃.nH₂O

• Fe₃O₄.nH₂O

Copper on exposure to air reacts with moisture and carbon dioxide to develop a green layer which is chemically

• Basic Copper carbonate

• Copper sulphate

• Copper Nitrate

• Copper Oxide

Which of the following is an example of displacement reaction?

• 2 KClO₃→KCl + O₂

• 2H₂ + O₂ →2 H₂O

• Zn + 2 HCl → ZnCl₂ + H₂

• N₂ + 3 H₂ → 2 NH₃

What will happen when we add iron nail into copper sulphate solution

• Blue color of the solution fades

• Reddish color appears on iron nail

• Color of the solution turns green after some time

• All of these

Burning of magnesium ribbon is a

• Chemical reaction

• Exothermic reaction

• A white color powder forms

• All of these

Q1. The following reaction is an example of -

4NH3 + 5O2 — 4NO + 6H2O

• Decomposition reaction

• Precipitation reaction

• Redox reaction

• Neutralization reaction