chemistry MCQs – Page 66

Practise multiple-choice questions from chemistry for competitive examinations and subject revision. Review each marked answer and report any item that may be outdated or unclear.

chemistry Mcqs
1301. Atom is the smallest particall which is_________?
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A. Divisible

B. Non of these

C. Both

D. Indivisible
1302. Which of the following element has the maximum electron affinity_____?
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A. Br

B. I

C. Cl

D. F

1303. Reading of a Barometer going down is an indication of:___________?
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A. Storm

B. Intense heat

C. Snow

D. Rainfall
1304. When SO2 solution is passed over which of the following it turns green?
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A. SO3

B. K2Cr2O7

C. P2O5

D. H2SO4

1305. Marsh gas is _________?
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A. Methane

B. Hydrogen

C. Ethane

D. Nitrogen

1306. What are the metal bearing rocks called?
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A. Bauxite

B. Ores

C. Metalloids

D. Bitumen

1307. The quality of petrol is improved by ____________?
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A. Cracking

B. Reforming

C. Refining

D. Hydration

1308. An acid-Base Reaction is always a/an __________?
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A. Endothermic

B. Fission

C. Fusion

D. Exothermic
1309. Carbon,Diamond and Graphite are together called:___________?
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A. Isotopes

B. Isomers

C. Allotrope

D. Isomorphs

1310. How much solar flux absorb by earths surface is used to drive hydrologic cycle:
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A. 1/5th

B. 1/2sec

C. 1/4th

D. 1/3rd
1311. The shielding Effect across the period __________?
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A. Increases

B. Remains Same

C. Decreases

D. None of them

1312. Which one of the following results in the discovery of proton.
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A. Alpha rays

B. Cathode rays

C. Canal rays

D. X-rays

1313. In SI base units, 1 Bq is equal to __________ ?
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A. 1.5 disintegration per second

B. 0.01 disintegration per second

C. 10 disintegration per second

D. 1 disintegration per second
1314. The Bond Energy of H-F is________?
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A. 281kJ/mol

B. 456kJ/mol

C. 562kJ/mol

D. None

1315. Which of the following can be separated by Sublimation Method?
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A. Sand and Iron Filing

B. Sand and Naphthalene

C. Both A & B

D. None

1316. The only non metal exists in liquid state is ___________?
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A. Phosphorus

B. Iodine

C. Bromine

D. Mercury

1317. The product of the reaction between steam and Hydrocarbon in presence of Ni catalyst at 900C is _____.
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A. CO+O

B. CO+HO

C. CO+H(water gas)

D. Laughing Gas

1318. How many isomeric aldoses are possible for the molecular formula C6H12O6?
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A. 2

B. 7

C. 4

D. 16
1319. In an electrolysis of aqueous Sodium Flouride, the species that moves towards Anode is _________?
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A. HO

B. Sodium

C. Flouride

D. None of them

1320. The hybridization of nitrogen atom in pyridine is_______?
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A. Sp3

B. Sp2

C. It is not hybridized

D. Sp