Chemistry Ch. 13 S And P Block Elements

15 Questions | By Nuzhatibrahim1 | Last updated: Jul 13, 2020 | Total Attempts: 51

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1.

On of the following alkali metals is most reactive. which is that?
- A.
  
  Ca
- B.
  
  Cs
- C.
  
  Na
- D.
  
  Mg
2.

Elements of Group I - A give colours in flame. it is due to their;
- A.
  
  Low melting point
- B.
  
  Softness
- C.
  
  Single electron in the outer most orbit
- D.
  
  Low ionization energy
3.

One of the following statements regarding alkali metals is not correct. indicate that.
- A.
  
  The hydroxides are alkaline in nature
- B.
  
  They belong to s-block of periodic table
- C.
  
  Alkali metals are very reactive
- D.
  
  They form carbonates which decompose on heating
4.

Measure of the tendency of an atom to attract a bonding pair of electron is called
- A.
  
  Ionization energy
- B.
  
  Electron affinity
- C.
  
  Electronegativity
- D.
  
  Atomic radius
5.

The atomic radii decrease as we move from left to right in a period. This is because;
- A.
  
  number of electrons increase
- B.
  
  Number of neutrons increase
- C.
  
  Nuclear charge increase
- D.
  
  Atomic number increase
6.

The most electronegative element fluorine has electronegativity value 4. Cs is least electronegative. what is its electronegativity value?
- A.
  
  0.4
- B.
  
  0.2
- C.
  
  0.5
- D.
  
  0.7
7.

Silicon is a;
- A.
  
  Good conductor
- B.
  
  Poor conductor
- C.
  
  Semiconductor
- D.
  
  Electrolyre
8.

Sulfur burns with
- A.
  
  Yellow flame
- B.
  
  Blue flame
- C.
  
  Green flame
- D.
  
  Red flame
9.

Phosphorus burns with
- A.
  
  White flame
- B.
  
  Yellow flame
- C.
  
  Red flame
- D.
  
  Green flame
10.

What is the color of Aluminium chloride
- A.
  
  White
- B.
  
  Brown
- C.
  
  Purple
- D.
  
  Pale yellow
11.

The nature of metallic oxides is
- A.
  
  Acidic
- B.
  
  Basic
- C.
  
  Neutral
- D.
  
  Amphoteric
12.

Which of the trimeric formula represents sulfur tri-oxide?
- A.
  
  SO3
- B.
  
  S3O9
- C.
  
  S2O6
- D.
  
  S2O2
13.

The formula of sodium hypochlorite is
- A.
  
  NaCl
- B.
  
  NaClO4
- C.
  
  NaClO3
- D.
  
  NaOCl
14.

Which of the following form giant covalent oxide?
- A.
  
  Phosphorus (V) oxide
- B.
  
  Carbon dioxide
- C.
  
  Silicon dioxide
- D.
  
  Sulfur trioxide
15.

Aluminium hydroxide is ___________ in nature
- A.
  
  Acidic
- B.
  
  Alkaline
- C.
  
  Neutral
- D.
  
  Amphoteric