Chemistry Interview Questions, Answers for Freshers and Experienced asked in various Company Job Interviews

General Chemistry (478)
Chemistry AllOther (190)

Chemistry Interview Questions

Questions Answers Views Company eMail

Why d-block elements are called outer while f-block elements are called inner transition elements?????????

3 16197

What is the difference between cracking, pyrolysis, destructive distillation, hydroforming, carbonization and dry distillation?

9856

Why don't electrons repel each other during the formation of bond?????????

1 7023

What is the difference between an ion and a radical?????

3 15238

Define:minerals and ores

2632

When a glass rod is heated gradually and suddenly dipped in cold water, it cracks. What is the reason????????? When a cool glass rod is suudenly heatd, it cracks. Why?????????

3 8030

Explain Thiele's structure for benzene. What is the difference between thiele's structure and modern structure (resonance hybrid) of benzene?

5314

In describing structure of benzene, by molecular orbital treatment, either MOT or VBT explains its structure?

2 5817

What is conjugated system?

3 6385

What is the mechanism for sulphonation of benzene by oleum?

1 7495

What is the structure of CO2 and CO?

Aptuit Laurus, Eisai,

4 8885

What is the effect of halogen on reactivity of benzene ring and what is the reason for decreasing reactivity?

3 8006

What are the least number of pi electrons possible in an aromatic compound.

3 6478

What is difference between anti-aromatic and non-aromatic compounds?

5 22008

Which organic compound is used as a fuel in jet air crafts? a. 100 octane b. 90 octane c. Kerosine oil d. Diesel oil

4 8020

Un-Answered Questions { Chemistry }

Basic principle of ESI?

2214

Why is acetic acid added?

1247

What modification is required for the atomic theory in order to explain the existence of isotopes, and modern view of atomic nuclei and electrons?

2303

Define hydra?

1116

on saturation solubility study data how we can find out the bcs class of drug?

961

Explain acid gas?

1103

What are the constituents of cements?

1108

Why to use propyl paraben in HPLC gradient calibration

7601

what are the checklist need to maintain in API manufacturing area as per USP requirements.......?

2929

seminal on pyrimidine

2248

Acid value definition is number milligrams of koh required to nuetralise the acid present in one gram oil & fats but why not use naoh for nuetralisation?

1206

How does Actinium interact with other elements, and what are some notable chemical reactions or compounds involving Actinium?

677

What is viscosity-coefficient of a liquid?

1488

why we need to synthesize impurities of midazolam

2318

what kind of question can be asked in interview for polarimeter related ?

5248

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