Q1
mcq
1 mark
The phenomenon observed when a beam of light is passed through a colloidal solution is :
- A. Coagulation
- B. Cataphoresis
- C. Tyndall effect
- D. Electrophoresis
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Q2
mcq
1 mark
The following set of reactions are used in refining Zirconium. This method is called as __________.
$$Zr(impure) + 2I_2 \xrightarrow{523 K} ZrI_4$$
$$ZrI_4 \xrightarrow{1800 K} Zr(pure) + 2I_2$$
- A. Zone refining
- B. Liquation
- C. Mond’s process
- D. Van Arkel process
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Q3
mcq
1 mark
Match the following :
(1)Emulsion (i)Whipped Cream
(2)Gel (ii)Ink
(3)Foam (iii)Cream
(4)Sol (iv)Butter
- A. (1) - (iv), (2) - (iii), (3) - (ii), (4) - (i)
- B. (1) - (iii), (2) - (i), (3) - (ii), (4) - (iv)
- C. (1) - (ii), (2) - (i), (3) - (iv), (4) - (iii)
- D. (1) - (iii), (2) - (iv), (3) - (i), (4) - (ii)
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Q4
mcq
1 mark
The pyrimidine bases present in DNA are :
- A. Cytosine and Thiamine
- B. Cytosine and Adenine
- C. Cytosine and Uracil
- D. Cytosine and Guanine
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Q5
mcq
1 mark
The pH of an aqueous solution is zero. The solution is :
- A. Neutral
- B. Slightly acidic
- C. Basic
- D. Strongly acidic
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Q6
mcq
1 mark
On reacting with neutral Ferric Chloride, Phenol gives :
- A. Dark green colour
- B. Red colour
- C. No colouration
- D. Violet colour
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Q7
mcq
1 mark
IUPAC name for the amine $$H_2N-CH_2(CH_2)_4CH_2NH_2$$
- A. Heptane-1, 7-diamine
- B. Hexamethylene diamine
- C. Hexane-1, 6-amine
- D. Hexane-1, 6-diamine
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Q8
mcq
1 mark
The number of electrons that have a total Charge of 9650 Coulombs is :
- A. 6.022\times 10^{22}
- B. 6.22\times 10^{23}
- C. 6.022\times 10^{-34}
- D. 6.022\times 10^{24}
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Q9
mcq
1 mark
Which of the following is not $sp^2$ hybridised ?
- A. Fullerene
- B. Graphite
- C. Diamond
- D. Graphene
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Q10
mcq
1 mark
$$CH_3-CHO + CO \xrightarrow{Rh/Ir\ complex} ?$$
- A. Poly propylene
- B. Butan-1-al
- C. Acetic acid
- D. Acetate
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Q11
mcq
1 mark
The crystal with a metal deficiency defect is :
- A. ZnO
- B. NaCl
- C. KCl
- D. FeO
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Q12
mcq
1 mark
In the following reaction, Product ‘X’ will not give :
- A. Iodoform test
- B. Tollen’s test
- C. Fehling solution test
- D. Victor Meyer test
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Q13
mcq
1 mark
Among the following graphs showing variation of rate constant with temperature (T) for a reaction, the one that exhibits Arrhenius behaviour over the entire temperature range is :
- A. (a)
- B. (b)
- C. (c)
- D. Both (b) and (c)
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Q14
mcq
1 mark
Which one of the following compounds is not formed ?
- A. $XeF_2$
- B. $XeOF_4$
- C. $NeF_2$
- D. $XeO_3$
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Q15
mcq
1 mark
In $[K_4Fe(CN)_6]$, the co-ordination number of $Fe^{2+}$ is __________.
- A. 4
- B. 2
- C. 3
- D. 6
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Q17
short answer
2 marks
Why ‘d’ block elements exhibit variable oxidation state ?
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Q21
short answer
2 marks
Mention any two factors that affect electrolytic conductance.
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Q22
short answer
2 marks
What is meant by Electro Osmosis ?
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Q23
short answer
2 marks
Write a short note on peptide bond.
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Q24
short answer
2 marks
From the following reaction, identify A and B.
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Q25
short answer
3 marks
What is meant by term “Coordination Number” ? What is the Coordination Number of atoms in a bcc structure ?
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Q26
short answer
3 marks
What are interhalogen compounds ? Give two examples.
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Q27
short answer
3 marks
Give the difference between double salts and coordination compounds.
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Q28
short answer
3 marks
Mention the factors responsible for the anomalous behaviour of the first element of p-block.
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Q29
short answer
3 marks
State Faraday’s laws of electrolysis.
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Q30
short answer
How are the following conversions effected?
(i) ethylene glycol → acetaldehyde
(ii) glycerol → acrolein
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Q31
short answer
Give the tests for carboxylic acid group.
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Q32
short answer
Give any three differences between DNA and RNA.
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Q33
short answer
Classify the following into covalent, molecular, ionic and metallic solids.
(i)Diamond (ii)Brass (iii)NaCl
(iv)Naphthalene (v)Glucose (vi)SiO2
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Q34
long answer
5 marks
(a) Explain Froth flotation process.
OR
(b)(i) Explain the bleaching action of Sulphur dioxide
(ii) Write any two uses of Helium.
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Q35
long answer
5 marks
(a)(i) What are interstitial compounds ?
(ii) Calculate the number of unpaired electrons in $Ti^{3+}$, $Mn^{2+}$ and calculate the spin only magnetic moment.
OR
(b)(i) What are the limitations of VB theory ?
(ii) Based on the VB theory, explain why $[Ni(CN)_4]^{2-}$ is diamagnetic.
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Q36
long answer
5 marks
(a)(i) Write two differences between rate and rate constant of a reaction.
(ii) Derive integrated rate law for a zero order reaction A → product.
OR
(b) Find the pH of a buffer solution containing 0.20 mole per litre sodium acetate and 0.18 mole per litre acetic acid. $K_a$ for acetic acid is 1.8×10⁻⁵.
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Q37
long answer
5 marks
(a)How will you convert benzaldehyde into the following compounds ?
(i)Benzoin
(ii)Cinnamic acid
(iii)Malachite green
OR
(b)(i)Differentiate primary, secondary and tertiary alcohols using Lucas test.
(ii)Give the uses of diethyl ether.
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Q38
long answer
5 marks
(a)Describe adsorption theory of catalysis.
OR
(b)A compound ‘A’ of molecular formula $C_{2}H_{3}N$ on reduction with Na(Hg)/$C_{2}H_{5}OH$ gives ‘B’ of molecular formula $C_{2}H_{7}N$ which undergoes carbylamine test. Compound ‘B’ on reaction with nitrous acid gives compound ‘C’ of molecular formula $C_{2}H_{6}O$ by liberating nitrogen. Identify A, B and C and write the reactions involved.
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Q39
mcq
1 mark
The following set of reactions are used in refining Zirconium. This method is called as __________.
Zr(impure) + 2I_{2} → 523 K → ZrI_{4}
ZrI_{4} → 1800 K → Zr(pure) + 2I_{2}
- A. Zone refining
- B. Liquation
- C. Mond’s process
- D. Van Arkel process
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Q40
mcq
1 mark
IUPAC name for the amine $H_{2}N CH_{2} (CH_{2})_{4} CH_{2} NH_{2}$
- A. Heptane-1, 7-diamine
- B. Hexamethylene diamine
- C. Hexane-1, 6-amine
- D. Hexane-1, 6-diamine
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Q41
long answer
5 marks
(a)Explain Froth flotation process.
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Q42
long answer
5 marks
(b)(i)Explain the bleaching action of Sulphur dioxide (ii)Write any two uses of Helium.
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Q43
long answer
5 marks
(a)(i)What are interstitial compounds? (ii)Calculate the number of unpaired electrons in Ti$^{3+}$, Mn$^{2+}$ and calculate the spin only magnetic moment.
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Q44
long answer
5 marks
(b)(i)What are the limitations of VB theory? (ii)Based on the VB theory, explain why [Ni(CN)$_{4}$]$^{2-}$ is diamagnetic.
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Q45
long answer
5 marks
(a)(i)Write two differences between rate and rate constant of a reaction. (ii)Derive integrated rate law for a zero order reaction A → product.
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Q46
long answer
5 marks
(b)Find the pH of a buffer solution containing 0.20 mole per litre sodium acetate and 0.18 mole per litre acetic acid. K$_{a}$ for acetic acid is 1.8×10$^{-5}$.
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Q47
long answer
5 marks
(a)How will you convert benzaldehyde into the following compounds? (i)Benzoin (ii)Cinnamic acid (iii)Malachite green
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Q48
long answer
5 marks
(b)(i)Differentiate primary, secondary and tertiary alcohols using Lucas test. (ii)Give the uses of diethyl ether.
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Q49
long answer
5 marks
(a)Describe adsorption theory of catalysis.
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