Chemistry - MOST IMPORTANT SSC CGL Previous Year Questions
Practice real questions from previous year exams of SSC CGL.
π Atomic Modelsπ 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.
π― SSC CGL (Tier-1) β 24/07/2023 (Shift-I)
π Atomic Modelsπ Dalton's Atomic Theory
Q2
In 1808 which of the following proposed that the combination of two or more different elements form compounds?
π― SSC CGL (Tier-1) β 26/07/2023 (Shift-I)
π Mole Conceptπ Molecular Mass
Q3
What is the elemental percentage composition of H2SO3?
π― SSC CGL (Tier-1) β 19/07/2023 (Shift-III)
π Gas Lawsπ Ideal Gas Equation
Q4
One mole of an ideal gas occupies volume of .......... litre at 237 k temperature and 1 atm pressure.
π― SSC CGL (Tier-I) 19/04/2022 (Shift-III)
π Laws of Chemical Combinationsπ 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.
π― SSC CGL (Tier-I)-2019 β 05/03/2020 (Shift-I)
π Mole Conceptπ Mole
Q6
One mole of an ideal gas occupies a volume of .......... litre at 273 K and 1 atm pressure.
π― SSC CGL 19/04/2022 (Shift-III)
π Pure Substance- Element-Classification of Matter on the basis of Chemical Properties- IIπ Metalloids
Q7
Which of the following are metalloids?
π― SSC CGL (Tier-1) β 18/07/2023 (Shift-II)
π Pure Substance- Element-Classification of Matter on the basis of Chemical Properties- IIπ Metalloids
Q8
Which of the following are metalloids?
π― SSC CGL (Tier-I) β 04/06/2019 (Shift-I)
π Pure Substance- Element-Classification of Matter on the basis of Chemical Properties- IIπ Metalloids
Q9
Which of the following elements is a metalloid?
π― SSC CGL(Tier-I)-04/06/2019 (Shift-I)
π Phase Changing Processes and Their Factorsπ Evaporation
Q10
The rate of vaporization increase by decreasing which of the following factor?
π― SSC CGL (Tier-I) 20/04/2022 (Shift-III)
π Phase Changing Processes and Their Factorsπ Boiling or Vaporization
Q11
The process of change from liquid to gas is called ?
π― SSC CGL(Tier-I)-13/06/2019 (Shift-I)
π Solutionπ Colloid and its types
Q12
An emulsion is a colloidal solution of
π― (SSC CGL (Tier-I) 06-09-2016, 4.15 pm)
π Solutionπ True Solution
Q13
are homogeneous mixtures of two or more components ?
π― SSC CGL(Tier-I)-05/03/2020 (Shift-II)
π Structure of Atomπ Proton
Q14
How many protons are found in nucleus of Lithium?
π― SSC CGL (Tier-I) 18/04/2022 (Shift-III)
π Structure of Atomπ Electron
Q15
Electron was discovered in the year 1897 by
π― SSC CGL(Tier-I)-07/06/2019 (Shift-II)
π Structure of Atomπ Atomic Number
Q16
Atomic number of an atom gives the number of which of the following?
π― (SSC CGL 08-09-2016, 10 am)
π Structure of Atomπ Electron
Q17
The antiparticle of an electron is ?
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π Structure of Atomπ Proton
Q18
How many protons are there in a lithium nucleus?
π― SSC CGL 18/04/2022 (Shift-III)
π Quantum Numberπ Spin Quantum Number
Q19
What is the difference between two electrons in an orbit?
π― (SSC CGL (TIER-1) 27-10-2016, 10 am)
π Quantum Numberπ Spin Quantum Number
Q20
In any shell the difference between two electron to be done by ?
π― (SSC CGL (Tier-I) 27-10-2016, 10 am)