Chemistry One-Liners for various competitive examinations- January 27th

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Chemistry One-Liners for various competitive examinations- January 27th

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 Here are some important Chemistry one-liners for students competing for various exams

 Watch some of the important Chemistry Bits below.


1- The mass number of a nucleus is-

1- Always more than the atomic weight.

2- Always less than its atomic number.

3- The sum of the number of neutrons and protons.

4- None of these.


2- From which among the following, Phosphorus is mainly extracted?

1- Fertiliser.

2- Bone Ash.

3- Sand.

4- Ash.


3- The main ingredient of cement among the following is?

1- Gypsum

2- Limestone.

3- Silica Clay

4- Ash.


4- This material among the following can be deformed permanently by heat and pressure-

1- Polymer.

2- Thermoplastic.

3- Chemical Compound.

4- Thermoset.


5-Nylon is prepared from which among the following?

1- Ethylene glycol and adipic acid phthalic acid.

2-Ethylene glycol and nitric acid diamine.

3- Hexamethylene diamine and phthalic acid.

4-Adipic acid and hexamethylene diamine.


6-Ascorbic acid is another name for this vitamin.

1- B

2- C.

3- A.

4- D


7- Ordinary Microscope can measure up to which among the following?

1- 500nm

2- 400nm.

3- 700nm

4- 200nm.


8- This is another name for electron pool theory-

1- Liquid theory.

2- Electron gas theory.

3- Pool theory

4- Solid theory.


9- In which Metallic theory was proposed?

1- 1987

2- 1978.

3- 1923.

4- 1900.


10- In 1748, the first-time word used in connection with electricity was-

1- Charge.

2- Battery.

3- Electrode.

4- All of them.


11- What happens when TEL (Tera Ethyl Lead) is added to petrol?

1- Decrease the anti-knocking rating.

2- Increase the anti-knocking rating.

3- Decrease the B.P of petrol.

4- It will increase the B.P of petrol.


12- Chlorine’s (Cl) relative atomic mass is 35.5. This half number is due to-

1- Half proton.

2- Isotopes.

3- Half Electron.

4- Half Neutron.


13- For deep sea diving oxygen is usually mixed with which among the following?

1- Nitrogen Gas.

2- Hydrogen.

3- Helium.

4- Argon Gas.


14- Dalton’s law of partial pressure has applications in-

1- Respiration.

2- Metabolism.

3- Circulation.

4- Excretion.


15- The hypothesis that equal volume of all gases possess the same number of molecules is called as-

1- Avogadro hypothesis.

2-Avogadro constant.

3- Alvarado’s theory

4- Avagadro’s equilibria.


ANSWERS-

1- The sum of the number of neutrons and protons.

2-Bone Ash.

3-Gypsum.

4-Thermoset

5-Adipic acid and hexamethylene diamine.

6- C

7- 500nm

8-Electron gas theory.

9-1923.

10-Battery.

11-Increase the anti-knocking rating.

12-Isotopes.

13-Helium.

14-Respiration.

15-Avogadro hypothesis.


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