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.361 The bond angle in a water molecule is approximately 104.5 degrees instead of 109.5 degrees due to:
A lone pair-lone pair repulsion
B bond pair-bond pair repulsion
C high electronegativity of oxygen
D hydrogen bonding
Discuss / Board
Q.362 Which of the following is a 'Pseudo-solid'?
A caesium chloride
B glass
C rock salt
D diamond
Discuss / Board
Q.363 The 'Cracking' process in the petroleum industry is used to convert:
A alkanes to alcohols
B heavy molecular weight fractions to light fractions
C light fractions to heavy fractions
D petrol to diesel
Discuss / Board
Q.364 Which law states that the total pressure exerted by a mixture of non-reacting gases is equal to the sum of partial pressures?
A graham's law
B dalton's law
C raoult's law
D henry's law
Discuss / Board
Q.365 What is the bond order of the Oxygen molecule (O2)?
A 1
B 2
C 3
D 1.5
Discuss / Board
Q.366 Which of the following is used as an 'anti-knocking' agent in gasoline?
A tetraethyl lead
B ethyl alcohol
C methyl benzene
D glycol
Discuss / Board
Q.367 The internal energy (U) of an ideal gas depends only on its:
A pressure
B volume
C temperature
D molecular size
Discuss / Board
Q.368 Which substance is used to absorb carbon dioxide in a laboratory?
A dilute hcl
B potassium hydroxide solution
C concentrated sulphuric acid
D calcium carbonate
Discuss / Board
Q.369 The 'Half-Life' of a first-order reaction is:
A inversely proportional to initial concentration
B directly proportional to initial concentration
C independent of initial concentration
D square of initial concentration
Discuss / Board
Q.370 Which of the following elements shows the property of 'maximum catenation'?
A silicon
B germanium
C carbon
D sulfur
Discuss / Board
Q.371 The 'Aqua Regia' is a mixture of concentrated HCl and concentrated HNO3 in the ratio:
A 1:3
B 3:1
C 2:1
D 1:2
Discuss / Board
Q.372 Which of the following is an example of an 'efflorescent' substance?
A washing soda
B common salt
C anhydrous calcium chloride
D concentrated sulphuric acid
Discuss / Board
Q.373 Which of the following is the most acidic oxide?
A na2o
B mgo
C al2o3
D p4o10
Discuss / Board
Q.374 Which among the following is an 'electrophile'?
A nh3
B h2o
C bf3
D cn-
Discuss / Board
Q.375 Which process is used for the purification of 'Bauxite' ore?
A baeyer's process
B froth flotation
C magnetic separation
D liquation
Discuss / Board
Q.376 The temperature at which a real gas behaves like an ideal gas over an appreciable range of pressure is called:
A critical temperature
B boyle temperature
C inversion temperature
D absolute zero
Discuss / Board
Q.377 Which of the following contains the highest percentage of Nitrogen?
A urea
B ammonium sulphate
C calcium nitrate
D potassium nitrate
Discuss / Board
Q.378 What is the shape of the 'SF6' molecule?
A tetrahedral
B trigonal bipyramidal
C octahedral
D hexagonal
Discuss / Board
Q.379 Which of the following is an 'Isotope' of Hydrogen that is radioactive?
A protium
B deuterium
C tritium
D ortho-hydrogen
Discuss / Board
Q.380 The 'Octane Number' of a fuel is a measure of its:
A ignitability
B resistance to knocking
C viscosity
D calorific value
Discuss / Board
Q.381 The conversion of 'Hard Water' into 'Soft Water' by using Zeolite involves:
A adsorption
B ion exchange
C sedimentation
D distillation
Discuss / Board
Q.382 Which among the following is a 'Polyamide'?
A terylene
B nylon 6,6
C teflon
D polythene
Discuss / Board
Q.383 Which of the following is not a 'Nucleophile'?
A h2o
B nh3
C alcl3
D oh-
Discuss / Board
Q.384 What is the main chemical constituent of 'Safety Matches' striking surface?
A white phosphorus + glass powder
B red phosphorus + glass powder
C phosphorus trisulphide
D potassium chlorate
Discuss / Board
Q.385 Which of the following is an 'Amphoteric' oxide?
A na2o
B zno
C so2
D cao
Discuss / Board
Q.386 The 'Brown Ring Test' is used for the qualitative analysis of which radical?
A nitrate
B carbonate
C sulphate
D chloride
Discuss / Board
Q.387 Which radioactive isotope is used in 'smoke detectors'?
A uranium-238
B americium-241
C cobalt-60
D carbon-14
Discuss / Board
Q.388 The 'Kjeldahl's Method' is used for the estimation of which element in organic compounds?
A carbon
B hydrogen
C nitrogen
D sulfur
Discuss / Board
Q.389 Which of the following describes 'Enthalpy' (H)?
A h = u + pv
B h = u - pv
C h = g + ts
D h = w + q
Discuss / Board
Q.390 Which indicator is best suited for the titration of a 'strong acid' and a 'weak base'?
A phenolphthalein
B methyl orange
C litmus
D thymol blue
Discuss / Board

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