Entry Test MCQ :: Periodic Classification

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41.

Melting points of VII-A group elements down the group

A.	Increase	B.	Decrease
C.	Remain constant	D.	No regular trend

42.

Oxidation state of an atom represents

A.	Number of electrons gained	B.	Number of electrons lost
C.	Apparent charge in compound	D.	Its vacancies

43.

Which of the following possesses maximum hydration energy?

A.	Na+	B.	K+
C.	Mg+2	D.	Ca+2

44.

Halides in which halogen atoms act as a bridge between two atoms of the other element are called

A.	Covalent halides	B.	Electronegative halides
C.	Polymeric halides	D.	Polymeric hydrides

45.

Less electronegative elements such as Be Ga A? etc form

A.	Polymeric halide	B.	Covalent halide
C.	Ionic halide	D.	All

46.

Iodine is solid due to

A.	Strong covalent bond	B.	Large value of dipole moment
C.	High polarizability	D.	Strong hydrogen bonding

47.

True increasing order of acidity of the oxides of Mn is

A.	MnO < MnO2 < Mn2O7	B.	Mn2O7 > MnO2 > MnO
C.	MnO2 > MnO > Mn2O7	D.	MnO2 > Mn2O7 > MnO

48.

Keeping in view the size of atom which order is correct one?

A.	Mg > Sr	B.	Ba > Mg
C.	Lu > Ce	D.	C1 > I

49.

Which one of the following element has highest exidation state in its compounds?

A.	Cr	B.	Mn
C.	Sn	D.	O

50.

Which of the following cannot exist in solution

A.	O-2	B.	H+
C.	Cl-	D.	Na+