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.391 The 'Plaster of Paris' hardens when mixed with water due to:
A oxidation
B hydration to gypsum
C dehydration
D carbonation
Discuss / Board
Q.392 Which of the following gases is produced during the 'Chlor-alkali' process at the anode?
A hydrogen
B oxygen
C chlorine
D carbon dioxide
Discuss / Board
Q.393 The process of heating an ore in the 'absence' of air below its melting point is called:
A roasting
B calcination
C smelting
D bessemerization
Discuss / Board
Q.394 Which of the following is the most effective 'coagulating agent' for a negative sol?
A na+
B mg2+
C al3+
D k+
Discuss / Board
Q.395 What is the coordination number of 'Sodium' in its Body-Centered Cubic (BCC) crystal structure?
A 4
B 6
C 8
D 12
Discuss / Board
Q.396 Which of the following is a 'thermosetting' polymer?
A pvc
B polystyrene
C bakelite
D polyethene
Discuss / Board
Q.397 The 'Ostwald's Process' is used for the industrial manufacture of:
A nitric acid
B sulphuric acid
C hydrochloric acid
D ammonia
Discuss / Board
Q.398 Which of the following is not an 'allotrope' of Sulfur?
A rhombic sulfur
B monoclinic sulfur
C plastic sulfur
D pyritic sulfur
Discuss / Board
Q.399 The 'Molar Conductivity' of an electrolyte generally:
A increases with dilution
B decreases with dilution
C remains constant
D depends on temperature only
Discuss / Board
Q.400 Which of the following represents the 'Le Chatelier's Principle' correctly?
A change in pressure affects solids
B equilibrium shifts to counteract a change
C catalysts shift equilibrium
D temperature only affects rate
Discuss / Board
Q.401 Which of the following is known as 'Glauber's Salt'?
A na2so4.10h2o
B mgso4.7h2o
C caso4.2h2o
D cuso4.5h2o
Discuss / Board
Q.402 The 'Lassaigne's Test' is used to detect:
A carbon and hydrogen
B nitrogen, sulfur, and halogens
C oxygen only
D metals only
Discuss / Board
Q.403 Which among the following is a 'Broad Spectrum' antibiotic?
A penicillin g
B chloramphenicol
C terpineol
D aspirin
Discuss / Board
Q.404 The number of 'sigma' and 'pi' bonds in a benzene molecule are:
A 6 sigma, 3 pi
B 12 sigma, 3 pi
C 9 sigma, 3 pi
D 12 sigma, 6 pi
Discuss / Board
Q.405 Which of the following is used in 'MRI' (Magnetic Resonance Imaging)?
A ferromagnetic substances
B paramagnetic substances
C superconducting magnets
D radioactive dyes only
Discuss / Board
Q.406 The 'Moseley's Law' relates the frequency of X-rays to the element's:
A atomic mass
B atomic number
C mass number
D valency
Discuss / Board
Q.407 Which of the following is not a property of 'Hydrophilic' colloids?
A high stability
B reversible nature
C easy coagulation by electrolytes
D strong affinity for solvent
Discuss / Board
Q.408 Which gas is used in the 'Acker Process' for producing magnesium?
A helium
B argon
C chlorine
D neon
Discuss / Board
Q.409 What is the hybridisation of Phosphorus in 'PCl5'?
A sp3
B sp3d
C sp3d2
D dsp2
Discuss / Board
Q.410 Which among the following is the 'Source' of Bio-gas?
A crude oil
B natural gas
C animal and agricultural waste
D coal
Discuss / Board
Q.411 The 'Solvay Process' is used for the manufacture of:
A sodium hydroxide
B sodium carbonate
C potassium hydroxide
D calcium carbonate
Discuss / Board
Q.412 Which of the following is 'Paramagnetic' in nature?
A n2
B o2
C h2
D cl2
Discuss / Board
Q.413 Which indicator is used for the titration of 'oxalic acid' against 'potassium permanganate'?
A phenolphthalein
B methyl orange
C starch
D no indicator (self-indicator)
Discuss / Board
Q.414 The 'Zeigler-Natta' catalyst is used in the polymerization of:
A vinyl chloride
B ethene
C styrene
D formaldehyde
Discuss / Board
Q.415 Which among the following elements is most likely to show the '+7' oxidation state?
A iron
B manganese
C chromium
D cobalt
Discuss / Board
Q.416 What is the role of 'Gypsum' in cement manufacture?
A increases strength
B reduces setting time
C slows down setting rate
D provides color
Discuss / Board
Q.417 The 'Bond Angle' in a methane molecule (CH4) is:
A 90 degrees
B 120 degrees
C 109 degrees 28 minutes
D 107 degrees
Discuss / Board
Q.418 Which of the following is not a 'Radioactive' element?
A astatine
B tellurium
C francium
D polonium
Discuss / Board
Q.419 The 'Critical Temperature' is the temperature above which a gas:
A cannot be liquefied by pressure
B cannot exist as a gas
C solidifies immediately
D becomes a plasma
Discuss / Board
Q.420 Which among the following is used as 'Gunpowder' component?
A calcium carbonate
B potassium nitrate
C sodium hydroxide
D magnesium sulphate
Discuss / Board

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