Which of the following gases will diffuse most rapidly?
[H = 1.00, C = 12.0, O = 16.0, S = 32.0, Cl = 35.5]
- A. Cl2
- B. SO2
- C. CH4
- D. C2H6
The vapour pressure of a liquid depends on:
I. Temperature II. rate of condensation III. Cohesive forces holding the particles together.
- A. I
- B. I and II
- C. I and III
- D. II and III
The general gas equation was deprived from______?
- A. Boyle's and Gay Lussac's laws
- B. Boyle's and Graham's laws
- C. Boyle's and Charles' laws
- D. Dalton's atomic theory
Consider the following reaction equation:
SO42-(aq) + 2H+(aq) + ye– \(\to\) SO42-(aq) + H2O(1).
The value of y in the equation is
- A. 2
- B. 3
- C. 4
- D. 6
The number of oxygen molecules present in 16.0g of the gas is ______?
[Avogadro’s number = 6.02 x 1023]
- A. 6.02 x 1022
- B. 6.02 x 1023
- C. 3.01 x 1023
- D. 1.51 x 1023
Consider the following reaction equation:
C2H4(g) + 3O2(g) \(\to\) 2CO2(g) + 2H2O(g)
The volume of CO2(g) produced at s.t.p when 0.05 moles of C2H4(g) was burnt in O2(g) is
[Molar Volume of gas = 22.4dm3
- A. 1.12dm3
- B. 2.24dm3
- C. 3.72dm3
- D. 4.48dm3
Which of the following trioxonitrate(V) salts would decompose on heating to form a metal?
- A. Cu(NO3)2
- B. AgNO3
- C. Pb(NO3)2
- D. KNO3
Which of the following substances when boiled with aqueous solution of sodium hydroxide would be hydrolyzed?
i. Protein ii. Fat iii. Polythene
- A. i
- B. ii
- C. i and ii
- D. ii and iii
Which of the following oxides is ionic?
- A. P4O10
- B. MgO
- C. Al2O3
- D. SO2
The shape of a graphite crystal is
- A. Tetrahedral
- B. Pyramidal
- C. Octahedral
- D. Hexagonal
To which group and period respectively does an element with 15 electrons belong?
- A. 3 and 3
- B. 3 and 5
- C. 5 and 3
- D. 5 and 5
The bond formed when ammonia reacts with hydrogen ion to form ammonium ion is
- A. Covalent
- B. Dative
- C. Hydrogen bond
- D. Ionic
The number of unpaired electrons in an atom of an element 8Q is _______?
- A. 2
- B. 4
- C. 6
- D. 8
The alkaline earth metals have similar chemical properties because________?
- A. They are in the same period
- B. Their salts are colourless
- C. They have the same number of valence electrons
- D. They are very reactive
Which of the following halogens is solid at room temperature?
- A. Bromine
- B. Chlorine
- C. Flourine
- D. Iodine
The gas given off when ethanol reacts with sodium is
- A. Carbon(IV)oxide
- B. Hydrogen
- C. Methane
- D. Oxygen
The following transition metal ions would be coloured in aqueous solution except________?
- A. Cr3+
- B. Fe3+
- C. Mn3+
- D. Sc3+
Which of the following pairs of compounds belongs to the same homologous series?
- A. C3H8 and C3H6
- B. C4H10 and C5H10
- C. C2H4 and C4H10
- D. C2H6 and C4H10
Which of the following pairs of elements forms amphoteric oxides?
- A. Be and Mg
- B. Na and K
- C. B and Al
- D. Si and Pb
A metallic ion Z\(^{2+}\) with an inert gas structure contains 18 electrons. How many protons are contained in this ion?
- A. 20
- B. 18
- C. 16
- D. 2
The shape of a molecule of water is _______?
- A. Non-linear
- B. Octahedral
- C. Pyramidal
- D. Tetrahedral