CBSE Class 10 Science Metals and Non Metals MCQs Set 06

Question. Magnesium reacts with ___________ water
(a) Cold
(b) Hot
(c) Steam
(d) none

Answer: B

Question. Which among the following statements is incorrect for magnesium metal?
(a) It burns in oxygen with a dazzling white flame.
(b) It reacts with cold water to form magnesium oxide and evolves hydrogen gas.
(c) It reacts with hot water to form magnesium hydroxide and evolves hydrogen gas.
(d) It reacts with steam to form magnesium hydroxide and evolves hydrogen gas.

Answer: B

Question. A substance is said to be sonorous if it _________.
(a) conducts heat
(b) conducts electricity
(c) conducts water through metal pipes
(d) produces a ringing sound when beaten

Answer: D

Question. What is the property that makes metals shine called?
(a) Malleability
(b) Ductility
(c) Sonorous
(d) Lustre

Answer: D

Question. What happens when a pellet of sodium is dropped in water?
(a) It catches fire and forms oxide.
(b) It absorbs heat and forms hydroxide.
(c) It catches fire and forms hydroxide.
(d) It absorbs heat and forms oxide.

Answer: C

Question. The chemical reaction between a piece of copper and nitric acid is given by the chemical equations,
Cu + HNO₃ → Cu(NO₃)₂ + H₂
H₂ + HNO₃ → H₂O + NO₂
What can be inferred from the chemical equation?
(a) Nitrate reacts with hydrogen to form NO₂ and H₂O.
(b) Hydrogen gas gets oxidized by HNO₃ to form water.
(c) Gas reacts with oxygen in the air to form water.
(d) Copper causes the oxidation of HNO₃ to form NO₂.

Answer: B

Question. 10ml of freshly prepared ferrous sulphate solution was taken in each of the test tubes. Strips of copper iron, zinc and aluminium were introduced, each metal zinc but not on the copper in a different test tube. A black residue was obtained in two of them. The right pair of metals would be
(a) copper and zinc
(b) aluminium and copper
(c) iron and aluminium
(d) zinc and aluminium

Answer: D

Question. Two beakers A and B contain iron sulphate solution. In the beaker A is placed a small piece of copper and in the beaker B is placed a small piece of zinc. It is found that a grey deposit forms on the zinc but not on the copper. It is concluded that
(a) zinc is most active metal followed by iron and copper
(b) zinc is most active metal followed by copper and then iron
(c) iron is most active metal followed by zinc and copper
(d) iron is most active metal followed by copper and then zinc

Answer: A

Question. Reaction between X and Y, forms compound Z. X loses electron and Y gains electron. Which of the following properties is not shown by Z?
(a) Has high melting point
(b) Has low melting point
(c) Conducts electricity in molten state
(d) Occurs as solid

Answer: B

Question. Identify the non-metal which exists in a liquid state in room temperature 25°C.
(a) Aluminium
(b) Mercury
(c) Iodine
(d) Bromine

Answer: D

Question. Which of the following is not a property of non-metals?
(a) They are neither malleable nor ductile
(b) They are brittle
(c) They are sonorous
(d) They are poor conductor of heat and electricity (except graphite)

Answer: C

Question. A reactive metal (M) is treated with H₂SO₄ (dil). The gas is evolved and is collected over the water as shown in the figure.
The correct conclusion drawn is/are
(a) the gas is hydrogen
(b) the gas is lighter than air
(c) the gas is SO₂ and is lighter than air
(d) Both (a) and (b)

Answer: D

Question. On adding zinc granules to freshly prepared ferrous sulphate solution, a student observes that
(a) a dull brown coating
(b) a black coating
(c) a greyish coating
(d) no coating

Answer: A

Question. 4 Strips labeled as A, B, C and D have colours reddish brown, dark grey, blackish grey and silvery white respectively. Which of this could be aluminium?
(a) A
(b) B
(c) C
(d) D

Answer: D

Question. Which of the following pairs of compounds undergo displacement reaction when they react with each other?
(a) Cu and AgNO₃ solution
(b) Ag and FeSO₄ solution
(c) Cu and NaCl solution
(d) Mg and NaCl solution

Answer: A

Question. Which of the following non-metals is a liquid?
(a) Carbon
(b) Bromine
(c) Phosphorus
(d) Sulphur

Answer: B

Question. A student adds some metallic ash in water taken in a test tube. The ash gets completely dissolved in water and the solution changes colour. What should the student do next to test the chemical properties of the product formed?
(a) Test the acidity using a blue litmus paper.
(b) Test the basicity using a red litmus paper.
(c) Measure the temperature change using a thermometer.
(d) Evaporate the solution to get crystals.

Answer: B

Question. The colour of coating developed on a zinc rod on dipping it in a aqueous copper sulphate solution will be
(a) Blue
(b) Brown
(c) White
(d) Green

Answer: B

Question. ___________ is an amphoteric oxide.
(a) calcium oxide
(b) Zinc oxide
(c) sodium oxide
(d) potassium oxide

Answer: B

Question. Sodium chloride is an ___________ compound.
(a) Ionic
(b) Covalent
(c) coordinate
(d) none

Answer: A

Question. Metal M reacts with oxygen to form metallic oxide MO. This oxide reacts with moisture and carbon dioxide of the atmosphere to form a basic carbonate metal M. The metal ‘M’ is
(a) Cu
(b) Fe
(c) Zn
(d) Cr

Answer: A

Question. On the basis of the sequence of the given reactions identify the most and least reactive elements respectively:
X + YA → XA + Y ...(1)
X + YB → XB + Y ...(2)
Z + XA → ZA + X ...(3)
(a) X and Z
(b) Y and Z
(c) Z and X
(d) Z and Y

Answer: D

Question. Name a non-metal which is a liquid.
(a) Bromine
(b) Iodine
(c) Chlorine
(d) Sulphur

Answer: A

Question. ___________ reacts with nitric acid and forms hydrogen gas.
(a) Manganese
(b) Iron
(c) Sodium
(d) Calcium

Answer: A

Question. Which is the most reactive metal in the reactivity series?
(a) Sodium
(b) Potassium
(c) Iron
(d) Calcium

Answer: B

Question. Which of the following statement is correct?
(a) Copper is more reactive than zinc
(b) zinc is more reactive than copper
(c) copper and zinc are equally reactive
(d) zinc is less reactive than copper

Answer: B

Question. When an aluminium strip is kept immersed in freshly prepared ferrous sulphate solution taken in a test tube, the change which is observed is
(a) the green solution slowly turns brown
(b) the lower end of the test tube becomes slightly warm.
(c) A colourless gas with a smell of burning sulphur is observed.
(d) light green solution changes to blue

Answer: B

Question. Non-metals which are lustrous and good conductor of electricity respectively are ______ and _______
(a) iodine, graphite
(b) iron, sulphur
(c) sulphur, graphite
(d) iodine, phosphorous

Answer: A

In the following questions a statement of assertion followed by a statement of reason is given. Choose the correct answer out of the following choices.
(a) Assertion and reason both are correct statements but reason is not correct explanation for assertion.
(b) Assertion is correct statement but reason is wrong statement.
(c) Assertion is wrong statement but reason is correct statement.
(d) Assertion and reason both are correct statements but reason is not correct explanation for assertion.

Question. A: Food cans are coated with tin and not with zinc.
R: Zinc is costlier than tin.

Answer: B

Question. A: Copper is used to make hot water tanks but not steel.
R: Copper is a good conductor of heat than steel and it is fairly resistant to corrosion

Answer: B

Question. A: Silver ornaments lose their shine when exposed to air.
R: Silver forms a green coating on its surface due to CO2

Answer: B

Question. A: Sulphide ores are calcinated.
R: Sulphide ores are heated strongly in excess of air.

Answer: B

Question. A: Gold cannot be alloyed.
R: Pure gold has a high melting point and is very soft. Thus the ornaments made from it do not keep their shape.

Answer: C

Question. A: Zinc is used in the galvanization of iron.
R: Iron is more reactive than zinc and so oxidation take place.

Answer: B

Question. A: We apply paint on iron articles.
R: Iron articles get rusted when exposed to air.

Answer: A

Question. A: Zinc oxide is an amphoteric oxide.
R: It reacts with both acid and base to form salt and water

Answer: A