Entry Test MCQ :: Basic Concept

@ : Home > Chemistry > Basic Concept

31.

Which of the following is not a macromolecule?

A.	sand	B.	haemoglobin
C.	diamond	D.	maltose

32.

Which of the following methods is used to estimate hydrogen in an organic compound?

A.	Combustion method	B.	Dumas method
C.	Kjeldahls method	D.	All of the above methods are for different purposes

33.

Isotopes of the same elements has

A.	different number of protons	B.	same number of neutrons
C.	different number of neutrons	D.	same mass number (nucleon number)

34.

The nucleus of an atom of every element will always contain

A.	neutrons	B.	protons and electrons
C.	protons	D.	protons and neutrons

35.

When cationic molecular ions are allowed to pass through strong magnetic field in mass spectrometer which of the following ions is fallen

A.	lighter	B.	intermediate
C.	heavier	D.	are collected at same time

36.

When 0.5 mole of phosphoric acid is dissolved in aqueous solution how many moles of -ve and +ve ions are collected altogether?

A.	0.5	B.	1
C.	1.5	D.	2

37.

For which of the following compounds the term empirical formula cannot be applied?

A.	NaCl	B.	H2O
C.	CCI4	D.	It can be applied to all mentioned above

38.

Dempsters mass spectrometer has number of zones / parts

A.	5	B.	4
C.	3	D.	2

39.

The properties of an element mosly corresponds to that isotope which has greater

A.	Mass number	B.	Atomic mass
C.	Relative abundance	D.	all of the above

40.

1 a.m.u =

A.	1.6 x 10-27 kg	B.	1.6 x 10-24 kg
C.	1.6 x 10-26 kg	D.	1.6 x 10-28 kg