KCET 2024 Chemistry Answer Key (Available): Download PDF

KCET Chemistry exam 2024 was conducted on 19th April, candidates who appeared for the exam felt the paper was moderate and found few theory-based questions in the paper.

Candidates can find the unofficial answer key released by the subject experts and training institutions. Also, note that candidates should consider this for reference purposes. The final key is yet to be released by the KEA

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KCET Chemistry Answer Key 2024 (Unofficial)

S. No	Question	Answer
1	Which of the following set of polymers are used as fibre?	Terylene and orlon are fibres
2	The biodegradable polymer obtained by polymerisation, of Glycine and Aminocaproic acid is	Nylon 2 – Nylon 6 is a biodegradable polymer
3	The compound   is	Saccharin
4	Which one of the following is a cationicdetergent?	Cetyltrimethylammonium bromide
5	The type of linkage present betweennucleotides is	Nucleotides are joined by Phosphodiester linkage
6	α – D – (+) – glucose and β – D – (+) – glucose are :	Anomers
7	Propanone and Propanal are	Functional isomers
8	Sodium ethanoate on heating with soda lime gives ‘X’. Electrolysis of aqueous solution of sodium ethanoate gives ‘Y’. ‘X’ and ‘Y’ respectively are:	Methane and Ethane
9	But-1-yne on reaction with dil. H
10	Biologically active adrenaline and ephedrine used to increase blood pressure contain:	Secondary amino group
11	In the reaction Aniline → (in presence of NaNO , dil.HCl) → P → (in presence of Phenol, NaOH) → Q	para-hydroxyazobenzene
12	The female sex hormone which is responsible for the development of secondary female characteristics and participates in the control of menstrual cycle is :	Estradiol
13	In the following scheme of reaction, X, Y and Z respectively are:	Hg2F2 alcoholic KOH and Na in dry ether
14	8:8 g of monohydric alcohol added to ethyl magnesium iodide in ether liberates 2240 cm3 of ethane at STP. This monohydric alcohol when oxidised using pyridinium-chlorochromate, forms a carbonyl compound that answers silver mirror test (Tollens’ test,). The monohydric alcohol is :	2,2-dimethyl propan-1-ol
15	When a tertiary alcohol ‘A’ (C4H10O) reactswith 20% H3PO4 at 358 K, it gives a compound‘B’ (C4H8) as a major product. The IUPACname of the compound ‘B’ is	2-Methylpropene
16	PCC is :	A complex of chromium trioxide with pyridine + HCI
17	On treating 100 mL of 0.1 M aqueous solutionof the complex CrCl3.6H2O with excess ofAgNO3, 2.86 g of AgCl was obtained. Thecomplex is	[Cr(H2O)5Cl]Cl2.H2O
18	The complex compounds [Co(NH3)5SO4]Br and[Co(NH3)5Br]SO4 are	Ionisation isomers
19	Which of the following statements are true about about [CoF36] ion?zI. The complex has octahedral geometry. II. Coordination number of Co is 3 and oxidation state is + 6.III. The complex is spIV. It is a high spin complex.	I, III, and IV
20	A haloalkane undergoes SN2 or SN1 reaction depending on	Solvent used in the reaction
21	2-Methyl propane can be prepared by Wurtz reaction. The haloalkanes taken along with metallic sodium and dry ether are :	chloromethane and 2-chloropropane
22	In the analysis of III group basic radicals of salts, the purpose of adding NH4Cls to NH4OH is :	To suppress the dissociation of NH4OH.
23	Solubility of CaC2O4 at a given temperature in pure water is 4 × 10 (mol L-1)2. Solubility of of CaC2O4 at the same temperature is	6.3 × 10-4 mol L-1
24	In the reaction between moist SO2 and acidified permanganate solution :
25	Which one of the following properties is generally not applicable to ionic hydrides?	Volatile
26	Which one of the following nitrate will decompose to give NO2 on heating?	LiNO3
27	Which of the following halides cannot be hydrolysed?	CCl4
28	0.48g of an organic compound on complete combustion produced 0.22 g of CO2. The percentage of C in the given organic compound is :	12.5
29	In the given sequence of reactions, identify ‘P’, ‘Q’, ‘R’ and ‘S’ respectively.	Br, Alc. KOH, NaNH, Red hot iron tube
30	The first chlorinated organic insecticide prepared is:	DDT
31	Which of the following crystals has the unit cell such that a = b ≠ c and α = β = 90°, γ = 120° ?	Cinnabar
32	MnO exhibits :	Antiferromagnetism
33	The number of atoms in 4.5 g of a face-centred cubic crystal with edge length 300 pm is : (Given density = 10 g cm-3 and NA = 6.022 × 10 23)	6.6 × 10 22
34	Vapour pressure of a solution containing 18 g of glucose and 178.2 g of water at 100°C is : (Vapour pressure of pure water at 100°C = 760 torr)	752.4 torr
35	A mixture of phenol and aniline shows a negative deviation from Raoult’s law. This is due to the formation of:	Intermolecular Hydrogen bond
36	Which one of the following pairs will show positive deviation fron Raoult’s Law?	Benzene – Methanol
37	How many Coulombs are required to oxidise 0.1 mole of H2O to oxygen ?	1-93 × 10 4 c
37	A current of 3 A is passed through a molten calcium salt for 1 hr 47 min 13 sec. The mass of calcium deposited is: (Molar mass of Ca = 40 g mol-1)	4.0 g
38		NaCl and KBr
40		60 kJ mol-1
41		3.0 mol L-1
42	Which one of the following does not represent Arrhenius equation?
43	Identify the incorrect statement:	Brownian movement is due to balanced bombardment of molecules of dispersion medium on colloidal particles.
44	For the coagulation of positively charged hydrated ferric-oxide sol, the flocculating power of the ions is in the order:
45	Gold sol is not a :	Macromolecular colloid
46	The incorrect statement about Hall-Héroult process is :	Oxidation state of oxygen changes in the overall cell reaction.
47	Select the correct statement:	Calcination of calcium carbonate is endothermic.
48	NO2 gas is :	Brown, acidic
49	Identify the incorrect statement from the following:	Ozone absorbs infrared radiation.
50	The correct decreasing order of boiling point of hydrogen halides is:	HF > HI > HBr > HCI
51		Oganesson
52	The transition element (≈ 5%) present with lanthanoid metal in Misch metal is :	Fe
53		I – ii, II – iii, III – i
54	Which of the following statements related to lanthanoids is incorrect?	Colour of Lanthanoid ion in solution is due to d- d transition
55	A metalloid is :	Sb and Se are metalloids.(According to NCERT of 15th and 16th group)
56	Iderntify the wrong relation for real gases :
57	From the Diagram △r H for the reaction C → A is :	-35 J
58	For which one of the following mixtures is composition uniform throughout?	Dilute aqueous solution of sugar
59	A pair of isoelectronic species having bond order of one is :
60	The energy associated with first orbit of He+ is	– 8.72 × 10 -18J

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