Non-polar molecules are held together by
- A. co-ordinate bond
- B. covalent bond
- C. electromagnetic force
- D. hydrogen bond
- E. Van der Waals forces
The Ideal Gas Law is expressed mathematically as
- A. P1 /T1 = P2/T2
- B. P1/V1 = P2V2
- C. PV =nRT
- D. PV =KT
- E. V1/T1 = V2/T2
Two elements X and Y with electronic configurations 2,8,2 and 2,8,7 respectively, are likely to combine by _________bonding
- A. covalent
- B. dative
- C. electrovalent
- D. hydrogen
- E. metallic
The furring of kettles and boilers are caused by
- A. calcium hydroxide
- B. calcium hydrogen trioxocarbonate (IV)
- C. calcium trioxocarbonate (IV)
- D. calcium tetraoxocarbonate
- E. magnesium tetraoxocarbonate (VI)
Which of the following metals is NOT extracted by electrolysis?
- A. Aluminium
- B. Calcium
- C. iron
- D. Magnesium
- E. Sodium
What mass of copper in gram would be deposited by a current of 1.00ampere passing for 965 seconds through copper(II) tertraoxosulphate (VI) solution? [Cu 63.5; If = 96500c]
- A. 0.32
- B. 0.64
- C. 3.18
- D. 6.35
- E. 9.65
How many zones are present in a luminous Bunsen burner flame?
- A. 2
- B. 3
- C. 4
- D. 5
- E. 6
When air is passed through alkaline pyrogallol and then lime water, the gases left are
- A. nitrogen and carbon (IV) oxide
- B. nitrogen and noble gases
- C. nitrogen and oxygen
- D. nitrogen, carbon (VI) oxide and noble gases
- E. the noble gases
A salt which loses its mass when exposed to air is
- A. deliquescent
- B. effervescent
- C. Efflorescent
- D. fluorescent
- E. hygroscopic
Atomic size decreases
- A. across a period from left to right
- B. across a period from right to left
- C. diagonally down the group
- D. down a group
- E. with decrease in atomic number
Sulphur has an oxidation number of +4 in
- A. H2S
- B. H2S04
- C. MgSO4
- D. Na2SO3
- E. S03
If the volume of a gas at 35°C is 60cm3, what would be its volume in cm3 at 273k?
- A. 39.03
- B. 46.81
- C. 53.18
- D. 67.69
- E. 76.92
C\(_6\)H\(_{12}\)O\(_6\)
What is the molar mass of the compound above?
[ H=1, C=12, O=16 }
- A. 45
- B. 61
- C. 180
- D. 123
- E. 244
In the electrolysis of dilute tetraoxosulphate (VI) acid using platinum electrodes, the products obtained at the anode are cathode respectively are
- A. hydrogen, oxygen
- B. Hydrogen, tetraoxosulphate (VI) ion
- C. oxygen, hydrogen
- D. sulphur, hydrogen
- E. sulphur, oxygen
A neon atom is chemically nonreactive because
- A. the electrons at the outermost shell is partially filled
- B. the number of protons equals the number of electrons
- C. the outer electron shell is completely filled
- D. there are equal number of protons and neutrons in its nucleus
- E. there are no elections at the outermost shell
\( ^{235}_{92}U + ^1_0n → ^{145}_{56}Ba + ^{88}_{36}Kr + 3^1_0n + Energy \)
The equation above represent a/an
- A. alpha particle emission
- B. endothermic reaction
- C. nuclear fission
- D. nuclear fusion
- E. thermal dissociation
Which of these compounds has the greatest ionic character?
- A. AlF3
- B. BF2
- C. CF4
- D. CsF
- E. NaF
What kind of bond exist between carbon and oxygen in C03 2-?
- A. Co- ordinate Covalent
- B. covalent
- C. Electrovalent
- D. Metallic
- E. Van der Waal forces
Which of the following gases will bleach moist litmus paper?
- A. Cl2
- B. CO2
- C. HCl
- D. N2O
- E. SO3
Which of the following compounds will undergo thermal dissociation?
- A. AgCl
- B. CaCO3
- C. K2S04
- D. NaOH
- E. NH4CI
The rate of a reaction usually increases with increase in the concentration of reactants because the
- A. distance between particles of the reactants increases
- B. frequency of collision of particles is lower
- C. particles of the reactants gain energy and move faster
- D. reactants from a complex which decomposes rapidly
- E. reactants occupy a higher energy level