NEET MCQ for Chemistry 18
Q.1.The pair in which phosphorous atoms have a formal oxidation state of + 3 is
A) Pyrophosphorous and pyrophosphoric acids
B) Orthophosphorous and pyrophosphorous acids
C) Pyrophosphorous and hypophosphoric acids
D) Orthophosphorous and hypophosphoric acids
Q.2.On dissolving sugar in water at room temperature solution feels cool to touch. Under which of the following cases dissolution of sugar will be most rapid
A) Sugar crystals in cold water
B) Sugar crystals in hot water
C) Powdered sugar in cold water
D) Powdered sugar in hot water
Q.3.An Substance formed after completion of reaction
Q.4.If travelling at same speeds, which of the following matter waves have the shortest wavelength
B) Alpha particle
Q.5.Which of the following is not a greenhouse gas
C) Carbon dioxide
D) All of above
Q.6.88Rn236 contains ————–neutrons in its nucleus
Q.7.A state of matter is known a gas, at atmospheric pressure, if
A) Its boiling point is lower than room temperature
B) Its boiling point is higher than room temperature
C) Its boiling point is equal to room temperature
D) None of the above
Q.8.The molecular mass of X is 106. X can be
Q.9.To get a n-type semiconductor from silicon, it should be doped with a substance with valence
Q.10.Maximum amount of a solid solute that can be dissolved in a specified amount of a given liquid solvent does not depend upon
B) Nature of solute
D) Nature of solvent
Q.11.A solution of (-)-1 – chloro – 1-phenylethane in toluene racemises slowly in the presence of a small amount of SbC13 due to the formation of
D) Free radical
Q.12.During a chemical reaction, the sum of the masses of the reactants and products
remains unchanged. This is known as the
A) Law of molar masses
B) Law of Conservation of Mass
C) Law of definite proportions.
D) Law of indefinite proportions.
Q.13.Which one of the following metals doesnot form amalgams?
Q.14.In Carius method of estimation of halogen, 250 mg of an organic compound gave 141 mg of AgBr. The percentage of bromine in the compound is: (at. Mass Ag = 108. Br = 80)
Q.15.Assertion A: Nitrogen and Oxygen are the main components in the atmosphere but these do not react to form oxides of nitrogen. Reason R: The reaction between nitrogen and oxygen requires high temperature.
A) Both assertion and reason are correct, and the reason is the correct explanation for the assertion
B) Both assertion and reason are correct, but the reason is not the correct explanation for the assertion.
C) The assertion is incorrect, but the reason is correct.
D) Both the assertion and reason are incorrect
Q.16.The reaction of zinc with dilute and concentrated nitric acid, respectively produces
A) NO2 and NO
B) NO and N2O
C) NO2 and N2O
D) N2O and NO2
Q.17.Which one of the following molecules is expected to exhibit diamagnetic behaviour?
Q.18.The high reactivity of fluorine is due to
A) Its high electro negativity
B) Small size of fluorine atom
C) Availability of d-orbitals
D) Strong F – F bond
Q.19.The hydronium ion is
Q.20.In which of the following Mercury is a constituent?
B) Chile saltpeter
Q.21.Which of the following gas is used in cigarette lighters?
Q.22.The isotope atoms differ in?
A) Number of neutrons
B) Atomic number
C) Number of electrons
D) Atomic weight
C) May be Both
D) None of Both
Q.24.The primary part of Liquefied Petroleum Gas LPG is______?
Q.25.Which among the following is not correctly matched:
A) Brass: copper and zinc
B) Duralumin : Copper and aluminum
C) Constantan: Copper and Nickel
D) White Gold-Gold and Silver