ISC Chemistry Specimen Paper 2024 Solved (pdf download)
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| ISC Chemistry Specimen Paper 2024 Solved (pdf download) |
SECTION A – 14 MARKS Question 1(A)
Fill in the blanks by choosing the appropriate word(s) from those given in the
brackets:
[decreases, CNion, activation energy, catalyst, two, Fe2+ ion, carbon, lattice
energy, enzyme, five, double, halogen, triple, increases]
[4×1]
(i) In the Haber process, iron changes the _______ of reaction while
molybdenum increases the efficiency of the _________.
(ii) The number of ions that will be produced when potassium ferrocyanide,
K4[Fe(CN)6], dissolves in water is _________. This shows that
__________ is the ligand in the coordination compound.
(iii) Haloalkenes undergo both nucleophilic and electrophilic reactions due to
the presence of __________bond and the __________ atom.
(iv) In case of alcohols, as the carbon chain length increases, the boiling
point ____________ and the solubility in water____________.
(B) Select and write the correct alternative from the choices given below: [7×1]
(i) A potassium iodide (KI) solution containing starch turns blue on the
addition of chlorine. Which one of the following statements explain this?
(P) The reduction potential of Cl2 is more than that of I2.
(Q) The oxidation potential of Cl2 is more than that of I2.
(R) The product formed when Cl2 combines with starch is blue.
(S) The product formed when I2 combines with starch is blue.
(a) Only P and R
(b) Only Q and R
(c) Only Q and S
(d) Only P and S
(ii) Crystal field splitting energy (CFSE) for high spin d4
octahedral complex
is:
(a) -1·6 ∆o
(b) -1·2 ∆o
(c) -0·8 ∆o
(d) -0·6 ∆o
(iii) Acidified K2Cr2O7 solution turns green when Na2SO3 is added to it. This
is due to formation of:
(a) CrO4
2-
(b) Cr2(SO3)3
(c) Cr2O3
(d) Cr2(SO4)3
(iv) Which of the following product is formed when benzene diazonium
chloride is reduced by hypophosphorous acid (H3PO2) in the presence of
cuprous ion as catalyst?
(a) Phenol
(b) Aniline
(c) Benzene
(d) Benzene cyanide
(v) Which of the following aqueous solution has lowest vapour pressure?
(a) 1M NaCl
(b) 1M K2SO4
(c) 1M Glucose
(d) 1M Sucrose
(vi) Assertion: Adding water to two beakers ‘A’ and ‘B’ containing NaOH
and CH3COOH solutions respectively will increase the molar
conductance (ꓥm) of the solutions sharply in beaker ‘A’ and
slowly in beaker ‘B’.
Reason: Molar conductance (ꓥm) increases with a decrease in
concentration or upon dilution.
(a) Both Assertion and Reason are true and Reason is the correct
explanation of Assertion.
(b) Both Assertion and Reason are true but Reason is not the correct
explanation for Assertion.
(c) Assertion is true but Reason is false.
(d) Assertion is false but Reason is true.
(vii) Assertion: Aniline is soluble in HCl while it is only slightly soluble in
water.
Reason: Aniline cannot make hydrogen bonds with water but gets
protonated easily by acids.
(a) Both Assertion and Reason are true and Reason is the correct
explanation of Assertion.
(b) Both Assertion and Reason are true but Reason is not the correct
explanation for Assertion.
(c) Assertion is true but Reason is false.
(d) Assertion is false but Reason is true
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| ISC Chemistry Specimen Paper 2024 Solved (pdf download) |
