Chemistry set 1 MCQs

Practice interactive objective questions for this topic. Select an option to instantly verify your answer and read detailed explanations.

Showing 504 questions
Q.451 The 'Entropy' of the universe is constantly:
A decreasing
B increasing
C remaining constant
D fluctuating
Discuss / Board
Q.452 What is the hybridisation of Xenon in 'XeF4'?
A sp3
B sp3d
C sp3d2
D sp2
Discuss / Board
Q.453 Which of the following is a 'reducing sugar'?
A sucrose
B glucose
C starch
D cellulose
Discuss / Board
Q.454 The 'Permanent Hardness' of water is due to the presence of:
A bicarbonates of Ca and Mg
B chlorides and sulphates of Ca and Mg
C carbonates of Na and K
D nitrates of silver
Discuss / Board
Q.455 Which process involves the 'Heating of Ore' in a limited supply of air?
A calcination
B roasting
C smelting
D leaching
Discuss / Board
Q.456 The 'Equilibrium Constant' ($K_c$) depends only on:
A initial concentration
B pressure
C temperature
D catalyst
Discuss / Board
Q.457 Which of the following describes 'Dalton's Atomic Theory' incorrectly?
A atoms are indivisible
B atoms of the same element are identical
C atoms can be created in lab
D atoms combine in simple ratios
Discuss / Board
Q.458 Which of the following elements is used as a 'doped' impurity in n-type semiconductors?
A boron
B aluminum
C phosphorus
D indium
Discuss / Board
Q.459 Which of the following is used as an 'anti-septic' in mouthwashes?
A aspirin
B hydrogen peroxide
C acetic acid
D methyl salicylate
Discuss / Board
Q.460 The 'Degree of Dissociation' of a weak electrolyte increases with:
A increase in concentration
B increase in dilution
C decrease in temperature
D addition of common ion
Discuss / Board
Q.461 The 'Rate Constant' of a reaction is doubled when the temperature is raised from 300K to 310K. This is explained by:
A boyle's law
B arrhenius equation
C charles's law
D avogadro's law
Discuss / Board
Q.462 Which of the following is used as an 'anti-freezing' agent in radiators?
A methanol
B ethylene glycol
C glycerol
D acetone
Discuss / Board
Q.463 The 'Dipole Moment' of carbon tetrachloride (CCl4) is:
A very high
B zero
C same as hcl
D negative
Discuss / Board
Q.464 Which among the following is an 'addition polymer'?
A nylon 6
B terylene
C pvc
D bakelite
Discuss / Board
Q.465 The 'Surface Tension' of a liquid generally:
A increases with temperature
B decreases with temperature
C remains constant
D is independent of density
Discuss / Board
Q.466 Which of the following is used in 'Vulcanization' to make rubber harder?
A carbon
B sulfur
C phosphorus
D magnesium
Discuss / Board
Q.467 Which gas is used in 'Cryogenic' surgery?
A liquid oxygen
B liquid nitrogen
C liquid helium
D argon
Discuss / Board
Q.468 Which among the following is used as an 'anti-acid' (Antacid)?
A sodium carbonate
B magnesium hydroxide
C sodium hydroxide
D calcium chloride
Discuss / Board
Q.469 The 'Boyle's Law' describes the relationship between:
A V and T at constant P
B P and V at constant T
C P and T at constant V
D V and n at constant P
Discuss / Board
Q.470 Which of the following is used in 'Lignite' to improve its quality?
A water
B air
C bitumen
D briquetting
Discuss / Board
Q.471 The 'Faraday's Constant' (F) is approximately:
A 96500 C/mol
B 6.023 x 10^23 C/mol
C 1.6 x 10^-19 C/mol
D 8.314 J/mol K
Discuss / Board
Q.472 Which among the following is a 'weak acid'?
A hcl
B hno3
C h2so4
D ch3cooh
Discuss / Board
Q.473 The 'Octet Rule' is not followed in which of the following?
A ch4
B nh3
C pcl5
D h2o
Discuss / Board
Q.474 What is the primary constituent of 'Limestone'?
A calcium oxide
B calcium carbonate
C calcium chloride
D calcium sulphate
Discuss / Board
Q.475 Which of the following has 'sp2' hybridisation?
A ethane
B ethene
C ethyne
D methane
Discuss / Board
Q.476 The 'Raoult's Law' deals with:
A solubility of gases in liquids
B vapor pressure of solutions
C osmotic pressure
D diffusion of gases
Discuss / Board
Q.477 Which of the following is an 'addition reaction'?
A methane + chlorine
B ethene + hydrogen
C ethanol + sodium
D benzene + nitric acid
Discuss / Board
Q.478 Which among the following is used in the 'Manufacture of Nylon 6'?
A adipic acid
B caprolactam
C phthalic acid
D vinyl cyanide
Discuss / Board
Q.479 The 'Avogadro's Number' represents the number of particles in:
A 1 kg of substance
B 1 g of substance
C 1 mole of substance
D 1 liter of substance
Discuss / Board
Q.480 Which of the following is used as 'flux' in the extraction of iron?
A silica
B limestone
C coke
D hematite
Discuss / Board

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