Quiz 5 Transition Elements

In order to protect the expansive engine in modern cars, the engine is carried over a metal rod. That metal rod should be easily broken in case of the front hit, so the engine falls down in a special shield for its protection. The metal rode is made of

• Iron

• manganese

• titanium

• nickel

 الحريق في خط خام (شقير - مسطرد) فى طريق القاهرة - الاسماعيلية الصحراوى. تم السيطره  على النيران بواسطة سيارات إطفاء 
الحريق ، والحماية المدنية ، وتم تشكيل لجنة للتحقيق في الحدث
after the disaster, the workers investigate the performance and safety of the other underground pipes using.........

• vanadium pentaoxide change in colour

• copper sulphate solution

• cobalt 60 isotpe

• potassium permenganate solution 

the cathode ray experement is concedered as the firest step in side the atom and the discovarey of the electrons. if both anode and cathode are made of secondium, and the added gas is mercury vapour ...............is observed.

• red light

• green light

• normal light with increased intensity

Which of the following configurations indicate an ion of a transition element:

• (Kr)5s²4d⁸

• (Kr)5s¹ 4d⁹

• (Kr)5s⁰ 4d⁹

• (Kr)5s¹ 4d⁸

Which of the following oxidation state is not allowed for Ni

• +3

• +4

• +2

• +5

How many unpaired electrons are present in Mn⁷⁺ ?

• 4

• 7

• 0

• 3

Which of the following is true about the oxidation state of transition metals?

• The oxidation state increases with increase in atomic number

• The oxidation state increases with increase in atomic number & reaches a maximum in the middle and then decreases

• The oxidation state decreases with increase in atomic number

• The oxidation state decreases with increase in atomic number, reaches a minimum at the middle and then increases

Which of the following pairs have the same electronic configuration?

• Mn³⁺ ,Fe³⁺

• Mn²⁺ ,Fe³⁺

• Mn²⁺ ,Fe²⁺

• Mn²⁺ ,Fe⁴⁺

All of the following elements, their compounds could be paramagnetic or diamagnetic except

• Copper

• Vanadium

• Zinc

• scandium

if the atomic mass of manganese is 54.8 and its atomic radius is 135 pm. knowing that the volume of a sphere is calculated from the law (V=4/3πr³ ). while the atomic mass of iron is 55.9. which one of the two metals sink faster in the water

• iron sink faster

• manganese sink faster

• both sink the same

• both float on the water surface