Chemistry Question Bank

Assertion: Most of the synthetic polymers are not biodegradable. Reason: Polymerisation process induces toxic character in organic molecules.

Assertion: Teflon has high thermal stability and chemical inertness. Reason: Teflon is a thermosetting polymer.

Assertion: Polytetrafluoroethene is used in making non-stick cookwares Reason: Fluorine has highest electronegativity.

Assertion: Olefinic monomers undergo addition polymerisation. Reason: Polymerisation of vinyl chloride is initiated by peroxides/persulphates.

Assertion: 1, 3-Butadiene is the monomer for natural rubber. Reason: Natural rubber is formed through anionic addition polymerisation.

Assertion: Polybutadiene is an example of chain growth polymer. Reason: Copolymerization of butadiene and styrene gives Buna-S.

Assertion: Network polymers are thermosetting. Reason: Network polymers have high molecular mass.

Bakelite is obtained from phenol by reacting with

Which one of the following is not a chalcogen?

Which one of the following pair of elements has similar properties?

Manganese is related to which block of the Periodic Table?

Molybdenum metal is related to which block?

Identify the electronic configuration of transition element.

The elements with atomic numbers 9, 17, 35, 53, 85 are all

Which pair has both members from the same period of Periodic Table?

In 1913, Henry Moseley observed regularity in the characteries…A…of the elements. Here, ‘A’ refers to

Physical and chemical properties of elements are determined by

The basis of modern periodic table is

Which of the following is incorrect explanation about Mendeleev’s periodic law ?

Mendeleev left the gap under aluminum and a gap under silicon and called these elements Eka-Aluminium and……A……Here, A refers to

According to Mendeleev, elements are arranged in order of their increasing ……A….Here, A refers to

Lothar Meyer drew a graph showing the relation between

Lothar Meyer plotted the physical properties such as atomic volume, melting point and ….A…..against atomic weight. Here, A refers to

John Alexander Newlands relationship referred to as the …….A…… Here, A refers to

According to Alexander Newlands, elements are arranged in…..A….order of their atomic weights. Here A refers to