Home » General Science » General Science MCQ » Chemistry

1250 Important Chemistry MCQ Question and Answer PDF

4000 Important General Science MCQ Question & Answer in PDF Download

1.Which of the following phenomenon is considered responsible for Global Warming?

  • AGreenhouse effect
  • BFire in coal mines
  • CMonsoon
  • DDry farming
Answer / Hint Save Question
Correct Answer : (A)

Greenhouse effect
Explanation:

2.The most suitable vessel for storing concentrated sulphuric acid is

  • ACopper vessel
  • BAluminium vessel
  • CGlass vessel
  • DEarthen vessel
Answer / Hint Save Question Comment On Question
Correct Answer : (C)

Glass vessel
Explanation:

3.Which of the following gases will effuse out of football bladder most quickly?

  • AHe
  • BH2
  • CN2
  • DO2
Answer / Hint Save Question Comment On Question
Correct Answer : (B)

H2
Explanation:

4.Which of the following alkali metals has highest specific heat?

  • ACaesium
  • BRubidium
  • CPotassium
  • DLithium
Answer / Hint Save Question
Correct Answer : (D)

Lithium
Explanation:

5.The heat required to raise the temperature of body by 1 K is called

  • Aspecific heat
  • Bthermal capacity
  • Cwater equivalent
  • DNone of the above
Answer / Hint Save Question Comment On Question
Correct Answer : (B)

thermal capacity
Explanation:

6.The most electronegative element among the following is

  • ASodium
  • BBromine
  • CFluorine
  • DOxygen
Answer / Hint Save Question
Correct Answer : (C)

Fluorine
Explanation:

7.The most electropositive elements among the following is

  • ANa
  • BCa
  • CK
  • DCs
Answer / Hint Save Question
Correct Answer : (D)

Cs
Explanation:

8.In which of the following substances all carbon atoms are quaternary in nature?

  • AGraphite
  • BDiamond
  • CTeflon
  • DNaphthalene
Answer / Hint Save Question
Correct Answer : (B)

Diamond
Explanation:

9.The most extensive, commercially useful source of thorium as monazite sand occurs in India at

  • AOdisha coast
  • BTravancore coast
  • CWest Bengal coast
  • DGujarat coast
Answer / Hint Save Question
Correct Answer : (B)

Travancore coast
Explanation:

10.The ratio of pure gold in 18 carat gold is :

  • A60%
  • B75%
  • C80%
  • D90%
Answer / Hint Save Question
Correct Answer : (B)

75%
Explanation:

11.Diamond is harder than graphite because of

  • ADifference in layers of atoms
  • BTetrahedral structure of diamond
  • CDifference of crystalline structures
  • DNone of these
Answer / Hint Save Question Comment On Question
Correct Answer : (A)

Difference in layers of atoms
Explanation:

12.What is the element required for solar energy conversion?

  • ABeryllium
  • BTantalum
  • CSilicon
  • DUltra pure carbon
Answer / Hint Save Question
Correct Answer : (C)

Silicon
Explanation:

13.Which of the following type of coal has the lowest proportion of volatile matter?

  • ALignite
  • BPeat
  • CBituminous
  • DAnthracite
Answer / Hint Save Question
Correct Answer : (D)

Anthracite
Explanation:

14.Which of the following is used as filler in tyre of rubber?

  • ACarbon black
  • BCoal
  • CCoke
  • DGraphite
Answer / Hint Save Question
Correct Answer : (A)

Carbon black
Explanation:

15.Which of the following alloy is used in making magnet?

  • ADuralumin
  • BStainless steel
  • CAlnico
  • DMagnalium
Answer / Hint Save Question
Correct Answer : (C)

Alnico
Explanation:

16.Cloud is a colloidal dispersion of 

  • AAir in a dispersion medium of water
  • BFog in a dispersion medium of water
  • CMist in a dispersion medium of air
  • DWater drops in a dispersion medium of air
Answer / Hint Save Question Comment On Question
Correct Answer : (D)

Water drops in a dispersion medium of air
Explanation:

17.The nuclear particles which are assumed to hold the nucleons together are

  • AElectrons
  • BPositrons
  • CNeutrons
  • DMesons
Answer / Hint Save Question Comment On Question
Correct Answer : (D)

Mesons
Explanation:

18.Which of the purest form of iron?

  • ASteel 
  • BCast iron
  • CPig iron
  • DWrought iron
Answer / Hint Save Question
Correct Answer : (D)

Wrought iron
Explanation:

19.Which of the following metals from an amalgam with other metals?

  • ALead
  • BTin
  • CZinc
  • DMercury
Answer / Hint Save Question
Correct Answer : (D)

Mercury
Explanation:

20.Which of the following is used in making smoke bombs?

  • ASulphur
  • BPhosphorus
  • CHydrogen
  • DCarbon
Answer / Hint Save Question
Correct Answer : (D)

Carbon
Explanation:
4000 Important General Science MCQ Question & Answer in PDF Download

Morning Exam

Morningexam.com provides Electrical MCQs, Notes, Exam Materials and Online Test series for your Competitive exams. You can also get Current Affairs, GK, Aptitude, Verbal Ability, and Reasoning questions. Best for ITI and Diploma Students.

Quick Links

Contact us

Have questions, comments or just want to say hello:

Follow Us

Copyright 2026 All rights reserved. Developed by Sucharita Banerjee