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Home → Chemistry → SSC CHSL → Chemistry Questions for SSC CHSL

Chemistry Questions for SSC CHSL

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Chemistry, SSC CHSL
Q1. Distillation at reduced pressure is used for liquids which
(a) Have high boiling points
(b) Have low boiling points
(c) Have high volatility
(d) Decompose before their boiling points

Q2. For a solution of volatile liquids, the partial vapour pressure of each component in solution is directly proportional to its
(a) Molarity
(b) Mole fraction
(c) Molality
(d) Normality

Q3. The solubility of the alkali metal carbonates
(a) Decreases as we go down the group
(b) Increases as we go down the group
(c) Increases at first and then decreases
(d) Does not show regular variation

Q4. When two gases are mixed, the entropy
(a) Remains constant
(b) Decreases
(c) Increases
(d) Becomes zero

Q5. Which of the following has the highest solubility in ionic solvent?
(a) Silver iodide
(b) Silver bromide
(c) Silver chloride
(d) Silver fluoride

Q6. A fractionating column is a glass apparatus used to
(a) Separate magnetic solids from non-magnetic solids
(b) Separate a mixture in water
(c) Separate two or more liquids
(d) Extract oils from vegetable matter

Q7. Water gas is a mixture of
(a) CO and H2
(b) CO and N2
(c) CH4 and H2
(d) CO2 and H2

Q8. The number of moles of solute present in 1 kg of a solvent is called its
(a) Molality
(b) Molarity
(c) Normality
(d) Formality

Q9. Which of the following statements is correct?
I. German silver is an alloy of silver, copper and zinc
II. There is no zinc in brass
III. Bronze is an alloy of copper and tin
(a) I, II and III
(b) Only III
(c) I and III
(d) I and II

Q10. Isotopes of an element
(a) Are physically identical to each other
(b) Are chemically identical to each other
(c) Are not identical to each other
(d) Have the same mass numbers

Q11. Of all the gases present in the air, which one of the following is the highest in percentage?
(a) Carbon dioxide
(b) Hydrogen
(c) Nitrogen
(d) Oxygen

Q12. Of the following particles, the particle having the least mass is
(a) Meson
(b) Neutron
(c) Electron
(d) Proton










Solutions

1.D
2.B
3.B
4.C
5.D
6.C
7.A
8.A
9.B
10.B
11.C
12.C







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