Which of the following is used as a cooling medium for the Large Hadron Collider (LHC) and the superconducting magnets in MRI scanners and NMR spectrometers?

What will be the atomic number of an element X which is placed in period 2 and group 17?

_______ is the process of complete or incomplete oxidation or hydrolysis of fats and oils when exposed to air, light, moisture, or bacterial action that spoils food.

From which Latin word is the s block element calcium derived?

Trichloromethane is better known as:

Which German chemist and physicist proposed that an aromatic compound must have an odd number of pairs of electrons, which can mathematically be written as 4n+2 (n = 0,1,2,3, etc.) in 1931?

Which element of Group 17 has two isotopes of masses 35 and 37 amu with average abundance of 75.77% and 24.23%, respectively?

The chemical formula of propene is:

Which of the following chemicals is used as a preservative to slow browning and discolouration in foods and beverages during preparation, storage and distribution?

What is the product formed when CH3CH20H reacts with 02?

_____is a naturally occurring organic compound with the formula (C6H5)2Co.

Identify the element one that does NOT belong to Group 1 of the Modern Periodic Table.

Which sodium compound is the most popular additive to various items such as sauces, salad dressings and beverages for its preservative action?

What happens to the atomic size as you go down the group?

Which of the following is the correct Lewis structure of 03?

The approximate amount of silica present in cement is:

Which of the following are metalloids?

Which of the following is a highly electropositive element that readily gives up an electron in order to obtain a stable electronic configuration?

Which element was arbitrarily assigned a value of 4.0 in the ‘Halogens’ section in 1922 by Linus Pauling, an American scientist?

Who discovered that diborane reacts with aldehydes and ketones to produce dialkoxyboranes, which are hydrolysed by water to produce alcohols?

1, 3-Dimethylbenzene also known as:

What is the percentage composition of the element of H2S03?

Which of the following pair of compound — boiling point is correct?

I. Chloroform — 334K
Il. Methane -111K

Pepperonil, ethyl acetate, butyraldehyde and nitrate are some common adulterants used in:

Which of the following has the highest boiling point?