Chemical Reaction And Equation 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
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