CUET LEVEL - I NEET Mock test -3 (Chemistry)

The set representing the correct order of first ionization potential is

• K > Na > Li

• Be > Mg > Ca

• B< C<N

• Ge< Si< C

Tags

3.7.1 (c)

Which of the following is most electronegative?

• Carbon

• Silicon

• Lead

• Tin

Tags

1.3.1

According to the periodic law of elements the variation in properties of elements is related to their

• Nuclear neutron - proton number ratio

• Atomic masses

• Nuclear masses

• Atomic numbers

Tags

3.2

The ions O²⁺, F^–, Na⁺, Mg²⁺ and Al³⁺ are isoelectronic, their ionic radii show.

• A significant increase from O^2- to Al³⁺

• An increase from O^2- to F^– and then decrease from Na⁺ to Al³⁺

• A significant decrease from O^2- to Al³⁺

• A decrease from O^2- to F^– and then increase from Na⁺ to Al³⁺.

Tags

3.7 (b)

Which of the following groupings represents a collection of isoelectronic species? [At. Nos. Cs = 55, Br = 35]

• Ca²⁺, Cs^–, Br

• Na⁺, Ca²⁺, Mg²⁺

• N^3-, F^–, Na⁺

• Be, Al³⁺, Cl^–

Tags

3.7

Identify the least stable ion amongst the following.

• Li^–

• Be^–

• B^–

• Cr^–

Tags

3.6

The group of elements in which the differentiating electron enters the antepenultimate shell of the atoms are called

• f - block

• P - block

• S - block

• d - block

Tags

3.6.4

Eka - Aluminium and Eka-silicon are known as

• Gallium and germanium

• Aluminium and silicon

• Iron and sulphur

• Neutron and magnesium

Tags

3.2

Element with atomic number 56 belongs to which block?

• s - block

• p- block

• d -block

• f - block

Tags

3.6.1

Total number of elements present in the 3rd period is

• 6

• 32

• 18

• 8

Tags

3.6.1