Chemistry - MOST IMPORTANT SSC CGL Previous Year Questions
Practice real questions from previous year exams of SSC CGL.
📘 Atomic Models📚 Dalton's Atomic Theory
Q1
Before 19th century who discovered that each chemical element is made from a unique type of atoms and those atom become different according their atomic mass.
🎯 SSC CGL (Tier-1) – 24/07/2023 (Shift-I)
📘 Atomic Models📚 Dalton's Atomic Theory
Q2
In 1808 which of the following proposed that the combination of two or more different elements form compounds?
🎯 SSC CGL (Tier-1) – 26/07/2023 (Shift-I)
📘 Mole Concept📚 Molecular Mass
Q3
What is the elemental percentage composition of H2SO3?
🎯 SSC CGL (Tier-1) – 19/07/2023 (Shift-III)
📘 Gas Laws📚 Ideal Gas Equation
Q4
One mole of an ideal gas occupies volume of .......... litre at 237 k temperature and 1 atm pressure.
🎯 SSC CGL (Tier-I) 19/04/2022 (Shift-III)
📘 Laws of Chemical Combinations📚 Avogadro's Law
Q5
Name the law in Physics which states that equal volume of all gases under the same conditions of temperature and pressure contain equal number of molecules.
🎯 SSC CGL (Tier-I)-2019 – 05/03/2020 (Shift-I)
📘 Mole Concept📚 Mole
Q6
One mole of an ideal gas occupies a volume of .......... litre at 273 K and 1 atm pressure.
🎯 SSC CGL 19/04/2022 (Shift-III)
📘 Pure Substance- Element-Classification of Matter on the basis of Chemical Properties- II📚 Metalloids
Q7
Which of the following are metalloids?
🎯 SSC CGL (Tier-1) – 18/07/2023 (Shift-II)
📘 Pure Substance- Element-Classification of Matter on the basis of Chemical Properties- II📚 Metalloids
Q8
Which of the following are metalloids?
🎯 SSC CGL (Tier-I) – 04/06/2019 (Shift-I)
📘 Pure Substance- Element-Classification of Matter on the basis of Chemical Properties- II📚 Metalloids
Q9
Which of the following elements is a metalloid?
🎯 SSC CGL(Tier-I)-04/06/2019 (Shift-I)
📘 Phase Changing Processes and Their Factors📚 Evaporation
Q10
The rate of vaporization increase by decreasing which of the following factor?
🎯 SSC CGL (Tier-I) 20/04/2022 (Shift-III)
📘 Phase Changing Processes and Their Factors📚 Boiling or Vaporization
Q11
The process of change from liquid to gas is called ?
🎯 SSC CGL(Tier-I)-13/06/2019 (Shift-I)
📘 Solution📚 Colloid and its types
Q12
An emulsion is a colloidal solution of
🎯 (SSC CGL (Tier-I) 06-09-2016, 4.15 pm)
📘 Solution📚 True Solution
Q13
are homogeneous mixtures of two or more components ?
🎯 SSC CGL(Tier-I)-05/03/2020 (Shift-II)
📘 Structure of Atom📚 Proton
Q14
How many protons are found in nucleus of Lithium?
🎯 SSC CGL (Tier-I) 18/04/2022 (Shift-III)
📘 Structure of Atom📚 Electron
Q15
Electron was discovered in the year 1897 by
🎯 SSC CGL(Tier-I)-07/06/2019 (Shift-II)
📘 Structure of Atom📚 Atomic Number
Q16
Atomic number of an atom gives the number of which of the following?
🎯 (SSC CGL 08-09-2016, 10 am)
📘 Structure of Atom📚 Electron
Q17
The antiparticle of an electron is ?
🎯 (SSC CGL (Tier-I) 07-09-2016, 1.15 pm)
📘 Structure of Atom📚 Proton
Q18
How many protons are there in a lithium nucleus?
🎯 SSC CGL 18/04/2022 (Shift-III)
📘 Quantum Number📚 Spin Quantum Number
Q19
What is the difference between two electrons in an orbit?
🎯 (SSC CGL (TIER-1) 27-10-2016, 10 am)
📘 Quantum Number📚 Spin Quantum Number
Q20
In any shell the difference between two electron to be done by ?
🎯 (SSC CGL (Tier-I) 27-10-2016, 10 am)