chemistry MCQs – Page 64

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 Review each marked answer and report any item that may be outdated or unclear.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
1261. Effective volume is usually taken for ____________ ?
comments icon0
A. 1 mole of gas

B. 3moles of gas

C. 5 moles of gas

D. 2 moles of gas

1262. What is the name of that system, which uses radioactivity to decide the period of materials of-pre-historic period ?
comments icon0

A. Deuterium dating

B. Radium dating

C. Carbon dating

D. Uranium dating

1263. The whole universe is made up of almost _______of Hydrogen?
comments icon0

A. 50%

B. 60%

C. 80%

D. 70%
1264. Water Gas is a mixture of two gases Hydrogen & Carbon monoxide, while separating Hydrogen gas by liquification process which one is liquefied first__?
comments icon0

A. Hydrogen Gas

B. Carbon Monoxide Gas

C. Both at same time

D. None of them
1265. In Dry cell, cathode is made up of_______?
comments icon0

A. ZnCl

B. MnO(Pyrolusite)

C. Zinc

D. Carbon (Graphite)
1266. Nitrate (NO3) ions are obtained by the process of __________?
comments icon0

A. Denitrification

B. Nitrification

C. None of these

D. Fermentation

1267. In water, Hydrogen is present ________by mass.
comments icon0

A. 15.15%

B. 22%

C. 11.11%

D. 31.13%

1268. Hydrogen Gas can be prepared by thermal decomposition of Methane in the absence of Air at above____
comments icon0

A. 500?C

B. 900?C

C. 700?C

D. 1300?C

1269. What is the mass of one mole of Iodine?
comments icon0

A. 53g

B. 127g

C. 254g

D. 74g

1270. Calculate % of N in KNO3__________?
comments icon0

A. 18.56%

B. 14.34%

C. None of these

D. 13.86%
1271. The radiations with negative charge are________.
comments icon0

A. Gamma radiations

B. Alpha radiations

C. positron

D. Beta radiations
1272. Optic fibres are used in :
comments icon0

A. Ultrasound scans

B. CAT scans

C. X-ray photos

D. Endoscopy
1273. Distance at which attractive forces of hydrogen overcome repulsive forces is __________ ?
comments icon0

A. 75.5pm

B. 75.4pm

C. 75.3pm

D. 75.2pm

1274. A helium nucleus comprising of two protons and two neutrons with a charge of 2e is _________ ?
comments icon0

A. Negative particle

B. Alpha particle

C. Beta particle

D. Gamma particle

1275. Alpha (?) particles are helium (He) nucleus with a charge of __________ ?
comments icon0
A. 2e

B. 3e

C. e

D. 4e

1276. Air is a/an _________?
comments icon0

A. Compound

B. Element

C. Electrolyte

D. Mixture
1277. Which of the following is non spontaneous cell?
comments icon0

A. Not

B. Galvanic cell

C. Electrolytic cell

D. Daniel cell

1278. d-block elements are also called as __________?
comments icon0

A. Inner Transition

B. Outer Transition

C. Alkali Metals

D. Both B & C

1279. Octane rating of Gasoline can be increased by __________?
comments icon0
A. Reforming

B. Refining

C. Cracking

D. None of These

1280. Treatment of sucrose with conc. HNO3 gives__________?
comments icon0

A. Glucose+ fructose

B. Nitrosucrose

C. Oxalic acid

D. Laevulinic acid