RRB NTPC Chemistry quiz for Stage I : 28/03/2019

28/03/2019

Railway/SSC JE 2019 Chemistry quiz for Phase I

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

Q1. Which among the following is white phosphorus?

(a) P1

(b) P6

(d) P5

Q2. Which among the following is present inside the nucleus of an atom?

(a) Protons and Neutrons

(b) Electrons and Protons

(d) Neutrons, Protons, Electrons

Q3. What is baking soda?

(a) Aluminum bicarbonate

(b) Sodium isolate

(d) Aluminum sulphate

Q4. Which among the following elements is a liquid at room temperature?

(a) Phosphorus

(b) Mercury

(d) Aluminum

Q5. Which among the following is an endothermic reaction?

(a) Respiration

(b) Combustion

(d) Burning of natural gas

Q6. Who discovered benzene?

(a) Hal Anger

(b) Michael Faraday

(d) Nicolas Appert

Q7. Which among the following is false about acids?

(a) They give H+ ions in aqueous solution

(b) Most acids contain hydrogen

(d) They are bad conductor of electricity in aqueous solution

Q8. The Chemical formula of Cadmium nitrate is _____.

(a) Cd(NO3)2

(b) CdNO3

(d) Cd2NO3

Q9. Which glass is used to make sunglasses?

(a) Crook’s glass

(b) Potash glass

(d) Soda glass

Q10. Beryllium loses ____ electrons to achieve noble gas electron configuration.

(a) 1

(b) 2

Answer Key

Ans.1.(c)

Exp. The most important form of elemental phosphorus from the perspective of applications and chemical literature is white phosphorus. It consists of tetrahedral P4 molecules, in which each atom is bound to the other three atoms by a single bond.

Ans.2.(a)

Exp. There are two types of particle in the nucleus of an atom the proton and the neutron.

Ans.3.(c)

Exp. Baking soda is also known as Sodium bicarbonate. It is a chemical compound with the formula NaHCO₃. It is a salt composed of sodium ions and bicarbonate ions. Sodium bicarbonate is a white solid that is crystalline but often appears as a fine powder.

Ans.4.(b)

Exp. There are two elements that are liquid in room temperature which are Bromine (Br) and Mercury (Hg).

Ans.5.(c)

Exp. Endothermic process describes a process or reaction in which the system absorbs energy from its surroundings. Sweating is a endothermic reaction.

Ans.6.(b)

Exp. Benzene was first discovered by the English scientist Michael Faraday in 1825

Ans.7.(d)

Exp. Acids are not bad conductor of electricity in aqueous solution.

Ans.8.(a)

Exp. The Chemical formula of Cadmium Nitrate is Cd(NO3)2.

Ans.9.(a)

Exp. Crook Glass is a type of glass that contains cerium and other rare earths and has a high absorption of ultraviolet radiation; used in sunglasses.

Ans.10.(b)

Exp. Beryllium has atomic number 4. Beryllium loses 2 electrons to achieve noble gas electron configuration.