chemistry MCQs – Page 65

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 Review each marked answer and report any item that may be outdated or unclear.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
1281. Black foot disease is caused by the pollution of groundwater as a consequence of increased seepage of:__________?
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A. Arsenic

B. Mercury

C. Fluorides

D. Nitrates

1282. Which one of the following radiation has the longer wavelength?
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A. gamma rays

B. x-ray

C. infra red

D. ultra violet

E. visible

1283. Atoms of all the elements always contain in nucleus:
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A. Neutron and electron

B. Neutron

C. Proton

D. Proton and neutron

1284. If a compound contains 24 gram of carbon 2 gram of hydrogen and 64 gram of oxygen then its empirical formula will be________?
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A. CHO2

B. CH2

C. C2H2O4

D. CH2O

1285. Which molecule have stronger London dispersion forces?
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A. Water

B. Hydrochloric acid

C. Hydrogen gas

D. Bromine

1286. I3( Tri-iodine) has shape_________?
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A. Trigonal bipyramidal

B. Linear

C. Square bipyramidal

D. Both A and C

1287. Which of the following is more acidic in nature?
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A. Cresol

B. Benzene

C. Phenol

D. p-nitrobenzene
1288. The Chemical Formula of Sand is___________?
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A. SiO2

B. Al2O3

C. Si2O3

D. Sr2O

1289. Which gas is used for artificial ripening of green fruit ?
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A. Acetylene

B. Carbon dioxide

C. Ethane

D. Ethylene
1290. __________ is one of the allotropic modifications of carbon.
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A. Diamond

B. Iodine

C. Silicon

D. Graphite

1291. The amount of Benzene is obtained from Coal Tar on its Fractional Distillation?
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A. 1-4Kg

B. 1-3Kg

C. 1-2Kg

D. 1-5Kg

1292. During electrolysis of Water, the product obtained at cathode is ___________?
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A. Only Water

B. Oxygen Gas &Water

C. ir khan Hullio

D. Only oxygen

E. Hydrogen Gas &Water
1293. BeCl2 has the hybrid orbitaks of type_______?
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A. dsp2

B. Sp3

C. Sp2

D. Sp
1294. Water molecule is________?
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A. Pyramidal

B. Triangular planer

C. V-shaped

D. Angular

1295. Elements which emit natural radioactivity are known as __________ ?
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A. Nuclear elements

B. Radioactive elements

C. Radio elements

D. Active elements

1296. Why does Ethyl Alcohol show high boiling point then Acetone?
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A. Due to Hydrogen bonding

B. Due to its Acidic nature

C. Due to high molecular weight

D. Due to its Low molecular weight

1297. The chemical symbol for silver is __________?
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A. Au

B. At

C. Sv

D. Ag
1298. Ethylene diammine is ligand________?
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A. Bi dentate

B. tri dentate

C. Poly dentate

D. mono dentate

1299. Which one of the following serve as aquatic solar fuel cell:
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A. Virus

B. Fungi

C. Bacteria

D. Algae
1300. Example of globular proteins is __________ ?
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A. Enzymes

B. Primary protein

C. Peptide

D. Secondary proteins