ALTS-Science-Chemical Reactions & Equations-MCQ

Some crystals of copper sulphate were dissolved in water. The color of the solution obtained would be

• green
• red
• blue
• brown.

Tags

NGSS.MS-PS1-2

What happens when dilute hydrochloric acid is added to iron filling? Tick the correct answer

• (a) Hydrogen gas and iron chloride are produced.
• (b) Chlorine gas and iron hydroxide are produced
• (c) No reaction takes place
• (d) Iron salt and water are produced

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

. When dilute HCl is added to zinc pieces taken in a test tube

• No change takes place
• the color of the solution becomes yellow.
• A pungent smelling gas gets liberated.
• small bubbles of H2 gas appear on the surface of zinc pieces

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

. PbS reacts with ozone (O3) and forms pbso4. As per the balanced equation, molecules of ozone required for every onr molecule of PbS/ are

• 4
• 3
• 2
• 1

Tags

NGSS.MS-PS1-5

The reaction between lead nitrate and potassium iodide present in aqueous solutions is an example of

• a) Decomposition Reaction
• (b) Displacement Reaction
• (c) Double Displacement Reaction
• (d) Neutralization Reaction

Tags

NGSS.MS-PS1-2

Chemically rust is

• Hydrated ferrous oxide
• hydrated ferric oxide
• only ferric oxide
• none of these

Tags

NGSS.MS-PS1-1

Which of the following reactions is not correct

• Zn+CuSO4 ZnSO4+Cu
• 2Ag+Cu(NO3) 2 2AgNO3+Cu
• Fe+CuSO4 FeSO4+Cu
• Mg+2HCl MgCl2+H2

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Heat is evolved diving

• (a) Endothermic Reaction
• (b) Displacement Reaction
• (c) Combustion Reaction
• (d) Combination Reaction

Tags

NGSS.HS-PS1-4

Copper displaces which of the following metals from its salt solution:

• ZnSO4
• FeSO4
• AgNO3
• NiSO4

Tags

NGSS.MS-PS1-2

In an electrolytic cell where electrolysis is carried, anode has:

• Positive change
• Negative charge
• Connected to negative terminal of the battery
• None of these is correct.