Chemical Reaction And Equation Quiz!

30 Questions | By Qcc95075 | Last updated: Mar 22, 2022 | Total Attempts: 1283

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Chemical Reaction And Equation Quiz! - Quiz

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1.

Chemically rust is:
- A.
  
  Hydrated ferrous oxide
- B.
  
  Only ferric oxide
- C.
  
  Hydrated ferric oxide
- D.
  
  None of these
2.

Both CO₂ and H₂ gases are:
- A.
  
  Heavier than air
- B.
  
  Colourless
- C.
  
  Acidic in nature
- D.
  
  Soluble in water
3.

Fatty food becomes rancid due to the process of:
- A.
  
  Oxidation
- B.
  
  Corresion
- C.
  
  Reduction
- D.
  
  Hydrogenetion
4.

We store silver chloride in a dark-colored bottle because it is:
- A.
  
  A white solid
- B.
  
  Undergoes redox reaction
- C.
  
  To avoid action of sunlight
- D.
  
  None of these
5.

When a magnesium ribbon is burnt in the air, the ash formed is:
- A.
  
  Black
- B.
  
  White
- C.
  
  Yellow
- D.
  
  Pink
6.

In which of the following heat energy will be evolved?
- A.
  
  Electrolysis of water
- B.
  
  Dissolution of NH₄Cl in water
- C.
  
  Burning of L.P.G.
- D.
  
  Decomposition of AgBr in presence of sunlight
7.

Rancidity can be prevented by:
- A.
  
  Adding antioxidants
- B.
  
  Storing food away from the light
- C.
  
  Keeping food in refrigeretor
- D.
  
  All of these
8.

The reaction of H₂ gas with oxygen gas to form water is an example of:
- A.
  
  Combination reaction
- B.
  
  Redox reaction
- C.
  
  Exothermic reaction
- D.
  
  All of these reaction
9.

The reaction in which two compound exchange their ions to form two new compounds is called:
- A.
  
  Displacement reaction
- B.
  
  Combination reaction
- C.
  
  Double displacement reaction
- D.
  
  Redox reaction
10.

An element X on exposure to moist air turns reddish-brown and a new compound Y is formed. The substance X and Y are
- A.
  
  X=Fe, Y=Fe₂O₂
- B.
  
  X=Ag, Y=Ag₂s
- C.
  
  X=Cu, Y=CuO
- D.
  
  X=Al, Y=Al₂O₃
11.

Before burning in air, the magnesium ribbon is cleaned by rubbing with a sandpaper to:
- A.
  
  Make the ribbon surface shinier
- B.
  
  Remove the layer of magnesium oxide from the ribbon surface
- C.
  
  Remove the layer of magnesium carbonate from the ribbon surface
- D.
  
  Remove the moisture from the ribbon surface
12.

In a chemical reaction between sulphuric acid and barium chloride solution the white precipitates formed are of:
- A.
  
  Hydrochloric acid
- B.
  
  Barium sulphate
- C.
  
  Chlorine
- D.
  
  Sulphur
13.

The respiration process during which glucose undergoes slow combustion by combining with oxygen in the cells of our body to produce energy is a kind of:
- A.
  
  Exothermic process
- B.
  
  Endothermic process
- C.
  
  Reversible
- D.
  
  Physical process
14.

A chemical reaction does not involve:
- A.
  
  Formation of new substances having entirely different properties than that of the reactants
- B.
  
  Breaking of old chemical bonds and formation of new chemical bonds
- C.
  
  Rearrangement of the atoms of reactants to form new products
- D.
  
  Changing of the atoms of on element into those of another element to form new products
15.

One of the following processes does not involve a chemical reaction. That is:
- A.
  
  Melting of candle wax when heated
- B.
  
  Burning of candle wax when heated
- C.
  
  Digestion of food in our stomach
- D.
  
  Ripening of banana
16.

It is necessary to balance a chemical equation in order to satisfy the law of:
- A.
  
  Conservation of motion
- B.
  
  Conservation of momentum
- C.
  
  Conservation of energy
- D.
  
  Conservation of mass
17.

You are given the following chemical reaction, this reaction represent:
- A.
  
  Combination reaction as well as double displacement reaction
- B.
  
  Redox reaction as well as displacement reaction
- C.
  
  Double displacement reaction as well as redox reaction
- D.
  
  Decomposition reaction as well as displacement reaction
18.

When ferrous sulfate is heated strongly it undergoes decomposition to form ferric oxide as a main product accompanied by a change in colour from:
- A.
  
  Blue to green
- B.
  
  Green to Blue
- C.
  
  Green to Broun
- D.
  
  Broun to Green
19.

Which of the following gases is used in the storage of fat and oil-containing foods for a long time?
- A.
  
  Carbondioxide gas
- B.
  
  Nitrogen
- C.
  
  Oxygen
- D.
  
  Neon
20.

Following is given a diagram showing an experimental set-up, The given set-up is used to carry out:
- A.
  
  Distillation of water
- B.
  
  Purification of water
- C.
  
  Electrolysis of water
- D.
  
  Hydrolysis
21.

The displacement reaction between iron (III) oxide and a metal X is used for welding the rail tracks. Here X is:
- A.
  
  Copper granules
- B.
  
  Magnesium ribbon
- C.
  
  Sodium pellets
- D.
  
  Aluminium dust
22.

The neutralization reaction between an acid and a base is a type of:
- A.
  
  Double displacement reaction
- B.
  
  Displacement reaction
- C.
  
  Addition reaction
- D.
  
  Decomposition reaction
23.

The chemical reaction between Hydrogen sulfide and iodine to give Hydrogen iodide and sulfur is given below, The reducing and oxidizing agents involved in this redox reaction are:
- A.
  
  Iodine and sulphur respectively
- B.
  
  Iodine and hydrogen sulphide respectively
- C.
  
  Sulphur and iodine respectively
- D.
  
  Hydrogen sulphide and sulphur
24.

Pb + CuCl₂ → PbCl₂ + Cu The above reaction is an example of:
- A.
  
  Combination
- B.
  
  Double displacement
- C.
  
  Decomposition
- D.
  
  Displacement
25.

Most reactive metal is:
- A.
  
  Mg
- B.
  
  Na
- C.
  
  K
- D.
  
  Al