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Question (11)

QN005012

A student has a mixture of 20 iron pins and sand. What should be removed first for the quickest separation?

(A) Sand by filtration
(B) Sand by sieving
(C) Iron pins using a magnet
(D) Sand by evaporation

Correct Answer: C

Explanation:

A magnet can quickly remove the iron pins.

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Question (12)

QN005013

Which mixture can be separated using magnetic separation?

(A) Salt and water
(B) Sugar and water
(C) Iron filings and sand
(D) Oil and water

Correct Answer: C

Explanation:

Iron filings are magnetic whereas sand is not.

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Question (13)

QN005014

A magnet is moved through a heap containing iron nails and sawdust. Which component will stick to the magnet?

(A) Sawdust only
(B) Iron nails only
(C) Both components
(D) Neither component

Correct Answer: B

Explanation:

Iron nails are attracted by the magnet.

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Question (14)

QN005015

Why is magnetic separation considered a convenient method?

(A) It dissolves substances quickly
(B) It separates components without heating
(C) It changes the properties of substances
(D) It converts solids into liquids

Correct Answer: B

Explanation:

No heating or chemical change is required.

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Question (15)

QN005016

A waste pile contains 45 iron pieces and plastic scraps. Which material can be collected using a magnet?

(A) Plastic scraps
(B) Iron pieces
(C) Both materials
(D) Neither material

Correct Answer: B

Explanation:

Iron is magnetic whereas plastic is not.

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Question (16)

QN005017

Which chapter studied earlier helps in understanding magnetic separation?

(A) Materials Around Us
(B) Exploring Magnets
(C) Journey Through States of Water
(D) Measurement of Length

Correct Answer: B

Explanation:

Knowledge of magnets helps explain magnetic separation.

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Question (17)

QN005018

If 80 iron nails are mixed with wood shavings and a magnet removes 72 nails, how many nails remain in the mixture?

(A) 6
(B) 8
(C) 10
(D) 12

Correct Answer: B

Explanation:

80 − 72 = 8 nails.

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Question (18)

QN005019

Which of the following industries commonly uses magnetic separation?

(A) Waste recycling industry
(B) Bakery industry
(C) Textile dyeing industry
(D) Pottery industry only

Correct Answer: A

Explanation:

Recycling centres use magnets to recover iron scrap.

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Question (19)

QN005020

What happens when a magnet is brought near iron filings?

(A) Iron filings dissolve
(B) Iron filings are attracted
(C) Iron filings evaporate
(D) Iron filings float

Correct Answer: B

Explanation:

Iron filings move towards the magnet.

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Question (20)

QN005021

Which of the following is the best example of magnetic separation in daily life?

(A) Removing tea leaves from tea
(B) Separating rice from stones
(C) Separating iron nails from sawdust
(D) Separating bran from flour

Correct Answer: C

Explanation:

Iron nails can be separated from sawdust using a magnet.

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Question (11)

A student has a mixture of 20 iron pins and sand. What should be removed first for the quickest separation?

Explanation:

Link:

Question (12)

Which mixture can be separated using magnetic separation?

Explanation:

Link:

Question (13)

A magnet is moved through a heap containing iron nails and sawdust. Which component will stick to the magnet?

Explanation:

Link:

Question (14)

Why is magnetic separation considered a convenient method?

Explanation:

Link:

Question (15)

A waste pile contains 45 iron pieces and plastic scraps. Which material can be collected using a magnet?

Explanation:

Link:

Question (16)

Which chapter studied earlier helps in understanding magnetic separation?

Explanation:

Link:

Question (17)

If 80 iron nails are mixed with wood shavings and a magnet removes 72 nails, how many nails remain in the mixture?

Explanation:

Link:

Question (18)

Which of the following industries commonly uses magnetic separation?

Explanation:

Link:

Question (19)

What happens when a magnet is brought near iron filings?

Explanation:

Link:

Question (20)

Which of the following is the best example of magnetic separation in daily life?

Explanation:

Link:

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