Intej Chemistry Department (Diagnostic 1)

40 Questions | By Mazrul79 | Last updated: Mar 19, 2022 | Total Attempts: 77

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1.

Diagram 1 shows the atomic model of an atom. Which of the following scientists suggested the model?
- A.
  
  Ernest Rutherford
- B.
  
  James Chadwick
- C.
  
  J.J. Thomson
- D.
  
  Neils Bohr
2.

Diagram 2 shows the set up of apparatus to investigate the diffusion in a liquid. After a few hours, the whole test tube of water becomes purple in colour Which of the following statements explain the observation?
- A.
  
  Potassium manganate(VII) is denser than water.
- B.
  
  Matter is made up of particles that expand uniformly
- C.
  
  Matter is made up of particles that are moving randomly
- D.
  
  Particles in potassium manganate(VII) move faster in water
3.

Which of the following solids changes to gaseous state when it is heated?
- A.
  
  Lead(II) iodide
- B.
  
  Silicon dioxide
- C.
  
  Ammonium chloride
- D.
  
  Copper(II) carbonate
4.

Which of the following isotopes is used in archaeology?
- A.
  
  Cobalt-60
- B.
  
  Carbon-14
- C.
  
  Iodine-131
- D.
  
  Phosphorus-32
5.

The following information is about atom A What is the electron arrangement of atom A?
- A.
  
  2.1
- B.
  
  2.2
- C.
  
  2.5
- D.
  
  2.8.1
6.

The mass of two atoms of element X is equal to that of three atoms of sulphur. What is the relative atomic mass of element X? [ Relative atomic mass of S = 32 ]
- A.
  
  96
- B.
  
  48
- C.
  
  32
- D.
  
  24
7.

What is the number of molecules in 1 mole of ammonia, NH₃? [Avogadro constant = 6.02 x 10²³ mol^-1]
- A.
- B.
- C.
- D.
8.

The chemical formula for aluminium sulphate is Al₂(SO₄)₃. What is its relative formula mass? [Relative atomic mass of O = 16, Al = 27 and S = 32]
- A.
  
  123
- B.
  
  150
- C.
  
  182
- D.
  
  342
9.

Table 1 shows part of the Periodic Table of Elements. What are the electron arrangements for atom of elements X and Y?
- A.
  
  X = 2.1 Y = 2.7
- B.
  
  X = 2.1 Y = 2.8.7
- C.
  
  X = 2.8.1 Y = 2.7
- D.
  
  X = 2.8.1 Y = 2.8.7
10.

A new element with symbol Nw is discovered. It has eight outer electrons in its atom. Which of the following statements is true?
- A.
  
  Nw exists as monoatomic.
- B.
  
  Nw is a solid at room temperature
- C.
  
  Nw reacts with sodium to form an ionic compound.
- D.
  
  Nw is a good conductor of electricity in solid state.
11.

Which of the following metals burn with a very bright purplish flame in a gas jar filled with oxygen and produces a white residue?
- A.
  
  Lead
- B.
  
  Silver
- C.
  
  Sodium
- D.
  
  Potassium
12.

Chlorine is a Group 17 element. Which of the following statements regarding chlorine is true?
- A.
  
  It exists as a liquid at room temperature
- B.
  
  It reacts with water to produce hydrogen gas
- C.
  
  It reacts with iron wool to form iron(II)chloride
- D.
  
  It reacts with potassium to form potassium chloride
13.

The atomic size decreases across the Period 3 because the
- A.
  
  Proton number increases
- B.
  
  Nucleon number decreases
- C.
  
  Number of neutrons increases
- D.
  
  Number of shell occupies electron decreases
14.

The following information shows the properties of element Q. Q is most probably
- A.
  
  Iron
- B.
  
  Sodium
- C.
  
  Sulphur
- D.
  
  Magnesium
15.

An atom that receives an electron forms
- A.
  
  A cation
- B.
  
  An anion
- C.
  
  An ionic bond
- D.
  
  A covalent bond
16.

Oxygen atom is different from oxide ion because oxide ion has
- A.
  
  More protons than oxygen atom
- B.
  
  More neutrons than oxygen atom
- C.
  
  More electrons than oxygen atom
- D.
  
  More shells occupied with electron than oxygen atom
17.

Diagram 3 shows the set up of apparatus to determine the electrical conductivity of a substance X The bulb lights up when X is
- A.
  
  Hydrogen chloride.
- B.
  
  Tetrachloromethane.
- C.
  
  Sodium chloride solid
- D.
  
  Potassium iodide solution
18.

Which of the following pairs of physical properties of compound W that is formed through transferring of electrons?
- A.
- B.
- C.
- D.
19.

The melting point of substance Z is -112^oC and its boiling point is 78^oC. What is the physical state of substance Z at room temperature?
- A.
  
  Gas
- B.
  
  Solid
- C.
  
  Liquid
- D.
  
  Gas and liquid
20.

Diagram 4 shows the curve obtained when a solid X is heated. Which of the following statements are true about the curve?
- A.
  
  I and III only
- B.
  
  I and IV only
- C.
  
  II and III only
- D.
  
  II and IV only
21.

Diagram 5 shows the standard representation of beryllium atom. What is the number of valence electrons of beryllium atom?
- A.
  
  2
- B.
  
  3
- C.
  
  4
- D.
  
  7
22.

Bromine-80 and bromine-81 are isotopes. Both isotopes have 35 protons. Which of the following statements is true about the bromine isotopes?
- A.
  
  Bromine-80 has less electrons than bromine-81
- B.
  
  Both isotopes have the same number of neutrons
- C.
  
  Both isotopes have the same chemical properties
- D.
  
  Bromine-81 has more shells filled with electrons than bromine-80
23.

The relative molecular mass of a compound with formula Na₂X₂ O₃ is 158. What is the relative atomic mass of element X? [ Relative atomic mass of O = 16 and Na = 23]
- A.
  
  120
- B.
  
  90
- C.
  
  64
- D.
  
  32
24.

The bromide of metal M has the formula MBr₃ and sodium phosphate has the formula Na₃PO₄ .What is the formula of the phosphate of metal M?
- A.
- B.
- C.
- D.
25.

Table 2 shows the nucleon number and the number of neutrons in of elements G and L. Which of the following is true about elements G and L?
- A.
  
  G is more reactive than L.
- B.
  
  G is more electropositive than L.
- C.
  
  Both dissolves in water to form an alkaline solution
- D.
  
  Melting point of element G is higher than that of element L