ISC SEMESTER 1 EXAMINATION
SPECIMEN QUESTION PAPER
CHEMISTRY
PAPER-1
(THEORY)
Maximum Marks: 70
Time allowed: One and a half hours
(Candidates are allowed additional 15 minutes for only reading the paper.)
ALL QUESTIONS ARE COMPULSORY
The marks intended for questions are given in brackets [ ].
Select the correct option for each of the following questions.
----------------------------------------------------------------------------------------------------------------------
Question 1
Na and Mg crystallise in bcc and fcc structures respectively. The value of Z (number of [1]
atoms) for their crystals is:
(a) 8 and 14
(b) 2 and 4
(c) 14 and 8
(d) 6 and 4
Question 2
Colligative properties depend on: [1]
(a) The nature of solute particles in solution
(b) The number of solute particles in solution
(c) The nature of solute and solvent particles
(d) The physical properties of solute particles in solution
1
,Question 3
On dilution, the specific conductance of a solution: [1]
(a) Remains unchanged
(b) Increases
(c) Decreases
(d) First increases then decreases
Question 4
The flux used in the extraction of iron from haematite ore is: [1]
(a) Limestone
(b) Silica
(c) Coke
(d) Calcium phosphate
Question 5
Which of the following xenon fluoride of xenon cannot be formed? [1]
(a) XeF2
(b) XeF4
(c) XeF6
(d) XeF3
Question 6 [1]
The gas obtained on heating iodoform with silver powder is:
(a) Propane
(b) Ethane
(c) Ethyne
(d) Ethene
2
, Question 7
Boiling point of ethyl alcohol is greater than diethyl ether due to: [1]
(a) Vander Waals forces
(b) London forces
(c) Polarity
(d) Hydrogen bonding
Question 8
In a face centred cubic lattice, atom ‘A’ occupies the corner positions and atom ‘B’ [1]
occupies the face centred positions. If one atom of ‘B’ is missing from one of the face
centred points, the formula of the compound will be:
(a) AB2
(b) A2B3
(c) A2B5
(d) A2B
Question 9
The standard reduction potential values of three metallic cations X, Y and Z are 0.52 V, [1]
- 3.03 V and -1.18 V respectively. The order of reducing power of the corresponding
metals is:
(a) Y > Z > X
(b) X > Y > Z
(c) Z > Y > X
(d) Z > X > Y
3
SPECIMEN QUESTION PAPER
CHEMISTRY
PAPER-1
(THEORY)
Maximum Marks: 70
Time allowed: One and a half hours
(Candidates are allowed additional 15 minutes for only reading the paper.)
ALL QUESTIONS ARE COMPULSORY
The marks intended for questions are given in brackets [ ].
Select the correct option for each of the following questions.
----------------------------------------------------------------------------------------------------------------------
Question 1
Na and Mg crystallise in bcc and fcc structures respectively. The value of Z (number of [1]
atoms) for their crystals is:
(a) 8 and 14
(b) 2 and 4
(c) 14 and 8
(d) 6 and 4
Question 2
Colligative properties depend on: [1]
(a) The nature of solute particles in solution
(b) The number of solute particles in solution
(c) The nature of solute and solvent particles
(d) The physical properties of solute particles in solution
1
,Question 3
On dilution, the specific conductance of a solution: [1]
(a) Remains unchanged
(b) Increases
(c) Decreases
(d) First increases then decreases
Question 4
The flux used in the extraction of iron from haematite ore is: [1]
(a) Limestone
(b) Silica
(c) Coke
(d) Calcium phosphate
Question 5
Which of the following xenon fluoride of xenon cannot be formed? [1]
(a) XeF2
(b) XeF4
(c) XeF6
(d) XeF3
Question 6 [1]
The gas obtained on heating iodoform with silver powder is:
(a) Propane
(b) Ethane
(c) Ethyne
(d) Ethene
2
, Question 7
Boiling point of ethyl alcohol is greater than diethyl ether due to: [1]
(a) Vander Waals forces
(b) London forces
(c) Polarity
(d) Hydrogen bonding
Question 8
In a face centred cubic lattice, atom ‘A’ occupies the corner positions and atom ‘B’ [1]
occupies the face centred positions. If one atom of ‘B’ is missing from one of the face
centred points, the formula of the compound will be:
(a) AB2
(b) A2B3
(c) A2B5
(d) A2B
Question 9
The standard reduction potential values of three metallic cations X, Y and Z are 0.52 V, [1]
- 3.03 V and -1.18 V respectively. The order of reducing power of the corresponding
metals is:
(a) Y > Z > X
(b) X > Y > Z
(c) Z > Y > X
(d) Z > X > Y
3
