Chemistry Quiz For SSC CGL Exam 2019-20 : 9th November

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Q1. Which among the following is false about alpha particles?
(a) They have high ionizing power
(b) They have high penetrating power
(c) They have high kinetic energy
(d) They are positively charged helium nuclei

Q2. Which among the following is not a characteristic of oxidation reaction?
(a) It involves addition of hydrogen
(b) It involves addition of oxygen
(c) It involves loss of electrons
(d) It involves addition of electronegative element

Q3. Soda water was invented by –
(a) Tivadar Puskas
(b) Joseph Priestley
(c) Petrache Poenaru
(d) James Leonard Plimpton

Q4. The mass of proton and mass of ________ is same.
(a) Neutron
(b) Electron
(c) Isoprone
(d) Alpha particle

Q5. Using which of the following processes can one separate a solute from its solution?
(a) Sedimentation
(b) Evaporation
(c) Filtration
(d) Condensation

Q6. Which among the following is not a characteristic of transition metals?
(a) Tendency to gain electrons
(b) Low electronegativity
(c) Low ionization energy
(d) Malleability

Q7. Ethylene is a ______ molecule.
(a) polar
(b) ionic
(c) covalent
(d) nonpolar

Q8. _________ gets converted to phosgene, when exposed to sunlight.
(a) Chloroform
(b) Acetone
(c) Benzene
(d) Propylene

Q9. Who discovered benzene?
(a) Hal Anger
(b) Michael Faraday
(c) Bruce Ames
(d) Nicolas Appert

Q10. Which among the following is false about acids?
(a) They give H+ ions in aqueous solution
(b) Most acids contain hydrogen
(c) They turn blue litmus red
(d) They are bad conductor of electricity in aqueous solution

 

solutions:-

S1. Ans.(b)
Sol. Alpha particles made of 2 protons and 2 neutrons and they have low penetrating power.
S2. Ans.(a)
Sol. Oxidation is loss of eletrons and addition of oxygen. It also involve addition of electronegative element.
S3. Ans.(b)
Sol. Soda water was invented by Joseph Priestley.
S4. Ans.(a)
Sol.Protons and neutrons have nearly the same mass while electrons are much less massive.
S5. Ans.(b)
Sol.Evaporation can separate a solute from its solution.
S6. Ans.(a)
Sol. Transition metals doen’t have tendency to gain electrons.
S7. Ans.(d)
Sol.Ehthylene is a hydrocarbon which has the formula C2H4 since the double bond is between two carbon atoms so there is no difference in electronegativity. That’s why the shared pair of electron come lie in between those to carbon atoms, so ethylene is non polar.
S8. Ans.(a)
Sol.Phosgene can from chloroform, in presence of oxygen and UV light.
S9. Ans.(b)
Sol.Benzene was first discovered by the English scientist Michael Faraday in 1825
S10. Ans.(d)
Sol. Acids are not bad conductor of electricity in aqueous solution.

 

 

                                                 

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