CBSE Class 10 Science Metals and Non Metals MCQs Set B

Answer : A

Question: Which of the following element is a metal ?
a) Aluminium
b) Boron
C) Carbon
d) Silicon

Answer : A

Question: Which of the following elements is not a metal ?
a) Calcium
b) Copper
c) Potassium
d) Sulphur

Answer : D

Question: Iron is a/an -
a) Alloy
b) Metal
c) Metalloid
d) Non-metal

Answer : B

Question: Which of the following non-metal is a good conductor of electricity ?
a) Diamond
b) Graphite
c) Phosphorus
d) Sulphur

Answer : B

Question: One of the constituents of amalgam is
a) Aluminium
b) Copper
c) Iron
d) Mercury

Answer : D

Question: Which of the following metal reacts with water causing fire ?
a) Aluminium
b) Calcium
c) Sodium
d) Zinc

Answer : C

Question: Which of the following metal is used in storage battery ?
a) Iron
b) Lead
c) Tin
d) Zinc

Answer : B

Question: The metal which exists as a liquid is
a) Aluminium
b) Sodium
c) Mercury
d) Potassium

Answer : C

Question: Which of the following non-metal exists in the liquid form ?
a) Chlorine
b) Bromine
c) Iodine
d) Fluorine

Answer : B

Question: Which of the following oxides is neither acidic nor basic?
a) CO₂
b) N₂O
c) SO₂
d) SO₃

Answer : B

Question: Which of the following displacement reaction is not possible?
a) Zn + CuSO4 → ZnSO4 + Cu
b) 2Ag + CuSO4 → Ag2SO4 + Cu
c) Mg + CuSO4 → MgSO4 + Cu
d) 2Na + CuSO4 → Na2SO4 + Cu

Answer : B

Question: Which of the following oxides may said to be neutral oxide ?
a) CO
b) CO₂
c) SO₂
d) SO₃

Answer : A

Question: Which of the following metal reacts with water/steam to produce oxide instead of hydroxide ?
a) Sodium
b) Potassium
c) Calcium
d) Magnesium

Answer : D

Question: Which of the following metal does not react with dilute hydrochloric acid producing hydrogen gas ?
a) Zinc
b) Tin
c) Lead
d) Copper

Answer : D

Question: Which of the following elements does not react with cold acid ?
a) Na
b) Mg
c) C
d) Zn

Answer : C

Question: The white phosphorus is stored
a) in air
b) in water
c) in kerosene
d) in CS2

Answer : B

Question: Which one of the following properties is not generally exhibited by ionic compounds ?
a) solubility in water
b) electrical conductivity in solid state
c) high melting and boiling points
d) electrical conductivity in molten state

Answer : B

Question: Reaction between X and Y, forms compound Z, X loses electron and Y gains electron. Which of the following properties is not show by Z ?
a) has high melting point
b) has low boiling point
c) conducts electricity in molten state
d) occurs as solid

Answer : D

Question: The electronic configurations of three elements X, Y and Z are X – 2, 8; Y – 2, 8, 7 Z – 2, 8, 2. Which of the following is correct ?
a) X is a metal
b) Y is a metal
c) Z is a non-metal
d) Y is a non-metals and Z is a metal

Answer : D

Question: Froth floatation process is used for the concentration of
a) Oxide ores
b) Sulphide ores
c) Chloride Ores
d) Amalgam

Answer : B

Question: The substance added in water in the froth floatation process is
a) Olive oil
b) Pine oil
c) Coconut oil
d) None of the above

Answer : B

Question: Iron ore is concentrated by
a) Froth floatation
b) Electrolysis
c) Roasting
d) Magnetic separation

Answer : D

Question: Bauxite ore is concentrated by
a) Froth floatation
b) Electromagnetic separation
c) Chemical treatment
d) Hydraulic separation

Answer : C

Question: Froth-floatation method is successful in separating impurities from ores because
a) The pure ore is denser than water containing additives like pine oil, cresylic acid etc
b) The pure ore is soluble in water containing additives like pine oil, cresylic acid etc
c) The impurities are soluble in water containing additives like pine oil, cresylic acid etc
d) The pure ore is not as easily wetted by water as by pine oil, cresylic acid etc

Answer : D

Question: Extraction of zinc from zinc blende is achieved by
a) Electrolytic reduction
b) Roasting followed by reduction with carbon
c) Roasting followed by reduction with another metal
d) Roasting followed by self-reduction

Answer : B

Question: Heating of pyrites in air for oxidation of sulphur is called
a) Roasting
b) Calcination
c) Smelting
d) Slagging

Answer : A

Question: A substance which reacts with gangue to form fusible material is called
a) Flux
b) Catalyst
c) Ore
d) Slag

Answer : D

Question: When lime stone is heated strongly, it gives off CO2. In metallurgy this process is known as
a) Calcination
b) Roasting
c) Smelting
d) Ore dressing

Answer : C

Question: The substance which is mixed with the ore for removal of impurities is termed as -
a) Slag
b) Gangue
c) Flux
d) Catalyst

Answer : A

Question: Ores mined from the earth are usually comtaminated with large amounts of impurities such as soil, sand, etc called_____________.
a) Gangue
b) Gravel
c) Sand
d) Granite

Answer : A

Question: Among the following select the metal found free in nature:
a) Au
b) Cu
c) Na
d) Mg

Answer : A

Question: What are the ions present in Na₂O?
a) Na+, O2-
b) Na2+, O2-
c) Na2+, O-
d) Na+, O

Answer : A

Question: Sodium is kept immersed in kerosene oil because:
a) All of the options
b) It reacts with moisture in the air
c) Immersing in kerosene cuts off the supply of air
d) The reaction of sodium with air is very violent.

Answer : A

Question: A list of metals arranged in the order of their decreasing activities is known as:
a) Reactivity series
b) Periodic table
c) Newlands law of octaves
d) All of these

Answer : A

Question: You are given two statements a and b, select the correct inference from this:
a) Metals conduct heat.
b) Diamond is the best conductor of heat.
a) Statement a is correct
b) Hence diamond is a metal
c) Statements a and b is correct
d) None of the options

Answer : A

Question: Gold is used in making ornaments because it is:
a) All of the options
b) Lusturous
c) Unreactive
d) Malleable

Answer : A

Question: An example of a metal which is a liquid at room temperature
a) Mercury
b) Zinc
c) Copper
d) Bromine

Answer : A

Following questions consists of two statements – Assertion (A) and Reason (R). Answer these questions selecting the appropriate option given below:
A. Both assertion and reason are true, and reason is the correct explanation of assertion.
B. Both assertion and reason are true, but reason is not the correct explanation of assertion.
C. Assertion is true but reason is false.
D. Assertion is false and reason is true.

Question: Assertion: Copper displaces silver from silver nitrate solution.
Reason: Copper is more reactive than silver.

Answer: A

Question: Assertion: Aluminium oxide and zinc oxide are acidic in nature.
Reason: Amphoteric nature means that substance have both acidic and basic character.

Answer: C

Question: Assertion: Different metals have different reactivities with water and dilute acids.
Reason: Reactivity of a metal depends on its position in the reactivity series.

Answer: B

Question: Assertion: Iron is the most widely used metal. But it is never used in its pure state.
Reason: Pure iron is very soft and stretches easily when hot.

Answer: A

Question: Assertion: Gold occurs in native state.
Reason: Gold is a reactive metal.

Answer: C