Railway/SSC JE 2019 Chemistry quiz for Phase I and other railways exams 14/02/2019

Railway/SSC JE 2019 Chemistry  quiz for Phase I

Railway/SSC JE Chemistry quiz for  (Phase I), RRB NTPC, SSC various exams and other competitive exams.

Q1. What is the largest component of lower atmosphere, by total volume?

(a) Oxygen

(b) Nitrogen

(c) Helium

(d) Water Vapour

Q2. Acetic Acid is another name for which of the following?

(a) Vinegar                                                                         

(b)Baking Soda

(c) Copper Sulphate                                                       

(d) Magnesium Oxide

Q3. The reaction of Copper Sulphate and Iron produces Iron Sulphate and __________.

(a) Vinegar                                                                         

(b)Ash

(c) Baking Soda                                                                

(d) Copper

Q4. A __________ thread is actually stronger than a steel wire.

(a) Wool                                                                                              

(b) Cotton

(c) Jute                                                                                

(d) Nylon

Q5. The process of depositing a layer of any desired metal on another material by means of electricity is called ___________.

(a) Electroplating                                                             

(b)Galvanisation

(c) Rusting                                                                          

(d) Crystallisation

Q6. Heat is transmitted from higher temperature to lower temperature through the actual motion of the molecules in –

(a) Conduction

(b) Convection

(c) Radiation

(d) Both conduction and convection

Q7. Silver gets corroded due to ________________ in air.

(a) Oxygen

(b) Hydrogen Sulphide

(c) Carbon dioxide

(d) Nitrogen

Q8. Which of the following is a radioactive element?

(a) Cobalt

(b) Uranium

(c)  Argon

(d) Chromium

Q9. The ‘solid waste’ is also known as

(a) Sedge

(b) Toxic waste

(c) Sludge

(d) Scrubber

Q10. The antiparticle of an electron is –

(a) Positron

(b) Proton

(c) Alpha particles

(d) Beta particles

Solution

Ans.1.(b)

Exp.By volume, Nitrogen is the largest component of the lower atmosphere.

Ans.2.(a)

Exp. Acetic acid is also known as vinegar.

Ans.3.(d)

Exp. The reaction of Copper Sulphate and Iron produces Iron Sulphate and Copper. It is a single displacement reaction.

Ans.4.(d)

Exp. Nylon is an artificial fibre. It has high tensile strength, stiffness, excellent heat deflection temperature, and superior abrasion and wear resistance. Nylon thread is actually stronger than a steel wire.

Ans.5.(a)

Exp.Electroplating is the process of plating(depositing) one metal onto another by means of electricity, most commonly for decorative purposes or to prevent corrosion of a metal.

Ans.6.(b)

Exp. In the convection process, heat is transferred in the liquid and gases from a region of higher temperature to a region of lower temperature. Convection heat transfer occurs partly due to the actual movement of molecules or due to the mass transfer.

Ans.7.(b)

Exp.Silver react with Hydrogen Sulphide in air to form Silver Sulphide. This is corrosion of silver.

Ans.8.(b)

Exp. Uranium is a radioactive element. Uranium is a chemical element with symbol U and atomic number 92.

Ans.9.(c)

Exp. Sewage sludge refers to the residual, semi-solid material that is produced as a by-product during sewage treatment of industrial or municipal wastewater.

Ans.10.(a)

Exp. Every type of particle has a corresponding antiparticle, for example; the positron is the antiparticle of the electron. the antiproton is the antiparticle of the proton. the antineutron is the antiparticle of the neutron. the antineutrino is the antiparticle of the neutrino.

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