Hydrogen and its Compounds: Solved Test Series, MCQ Questions for IIT, NEET, JEE Main & Advanced, AIPMT, VITEEE

Chemistry solved Test Series, MCQ practice questions exclusively helpful for preparing Joint Entrance Examinations, JEE Main and Advanced, Medical and Engineering Entrance Exams, MBBS admission tests, NEST and other competitions.

Hydrogen and its Compounds (Topics / Syllabus):
Position of hydrogen in the periodic table; Discovery, Occurrence, Preparation, Properties and Industrial Applications of Hydrogen; Dihydrogen - Isotopes of hydrogen, Properties, Preparation and Uses of dihydrogen; Heavy Hydrogen or Deuterium; Tritium; Hydrides and their classification; Water - structure of water and ice, properties of water, hard and soft water, Hydrogen Peroxide; Heavy water. 

Chemistry Solutions and Guide : Hydrogen and its Compounds

MCQ Test Series – Practice Questions - Set 2 (Q. No. 11-20)

Question 11: Normality of 100 volume H2O2 is –
a. 1.78
b. 8.9
c. 17.86
d. 0.89

Question 12: Nascent hydrogen consists of:
a. Hydrogen atoms with excess of energy
b. Hydrogen molecules with excess energy
c. Hydrogen ions in excited state
d. Solvated protons

Question 13: What is false about H2O2?
a. Acts both as oxidising and reducing agent
b. Two OH bonds lie in the same plane
c. Pale blue liquid
d. Can be oxidised by O3

Question 14: Heavy water is manufactured by:
a. Combination of hydrogen and heavier isotope of oxygen
b. Electrolysis of water containing heavy hydrogen dissolved in it
c. Repeated electrolysis of 3% aqueous solution of NaOH
d. None of the above

Question 15: The temporary hardness of water due to calcium bicarbonate can be removed by adding:
a. CaCO3
b. CaCl2
c. HCl
d. Ca(OH)2

Question 16: Solubility of NaCl in heavy water is –
a. Same as that in H2O
b. 15% lower than that in H2O
c. 15% more than that in H2O
d. 100% more than that in H2O

Question 17: Action of water or dilute mineral acids on metals can give:
a. Monohydrogen
b. Tritium
c. Dihydrogen
d. Trihydrogen
e. D2

Question 18: When hydrogen peroxide is treated with a cold acidified K2Cr2O7 solution containing ether, a blue colour is obtained. This is due to:
a. Chromium sulphate
b. Potassium chromate
c. Perchromic acid
d. Chromium trioxide

Question 19: The shape of water molecule is same as that of:
a. C2H2
b. CO2
c. NH3
d. Cl2O

Question 20: The correct order of dielectric constant values –
a. H2O > D2O > H2O2
b. H2O >H2O2>D2O
c. H2O<D2O>H2O2
d. H2O <H2O2<D2O

India Study Solution - Chemistry Solutions & Guide
hydrogen and its compounds
Solutions of Chemistry MCQ Test Series MCQ Practice Questions – Set 2 (Q.No. 11 – 20)
Answer 11: (c).

Answer 12: (b) Hint: Hydrogen at the moment of formation is known as Nascent Hydrogen. It is believed that part of energy liberated in the reaction producing hydrogen become associated with hydrogen molecules and thus, make them hyperactive.

Answer 13: (b) Hint: Two OH bonds lie in the different planes.

Answer 14: (c) Hint: Repeated electrolysis of 3% aqueous solution of NaOH.

Answer 15: (d).   Answer 16: (b).   Answer 17: (c).

Answer 18: (c) Hint: A solution of K2Cr2O7 in H2SO4 is oxidised to blue chromic acid by H2O2 and dissolve in ether to give blue coloured solution.
K2Cr2O7 + H2SO4 → K2SO4 + H2Cr2O7
H2Cr2O7 + 4H2O2 → 2CrO5 + 5H2O
K2Cr2O7 + H2SO4 + 4H2O2 → K2SO4 + 2CrO5 + 5H2O
                                              Perchromic acid (blue)

Answer 19: (d).   Answer 20: (a).

 Hydrogen and its Compounds - Chemistry Objective Questions, Test Series 

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Genetics and Evolution - solved objective questions and MCQ test series

Free Biology online Solution and Guide: solved practice questions, test series, for preparing NEET, MBBS Admission Tests, Medical Entrance Exams, JEE and other competitions
Solved MCQ Test Series, Practice Questions from topics covered -
Origin of life; Biological Evolution and Evidences for Biological Evolution from Palaeontology, Comparative Anatomy, Embryology and Molecular Evidence; Darwin’s Contribution, Modern Synthetic theory of Evolution; Mechanism of Evolution-Variation (Mutation and Recombination) and Natural Selection with examples, types of Natural Selection; Gene Flow and Genetic Drift; Hardy-Weinberg’s Principle; Adaptive Radiation; Human Evolution. 

Biology Solution and Guide: Evolution

MCQ Test Series – Set 1 (Q. No. (1-10)

Question 1: Which of the following statements is correct regarding evolution of mankind?
a. Neanderthal man and Cro-Magnon man were living at the same time
b. Australopithecus was living in Australia
c. Homo erectus is preceded by Homo habits
d. None of these

Question 2: Russian scientist who proposed the theory of origin of life was –
a. Oparin
b. Haldane
c. Miler
d. Fox

Question 3: Fossilization can occur when –
a. Animals are buried and preserved by natural processes
b. Animals are destroyed by the scavengers
c. Animals are eaten up by predators
d. Animals are destroyed by environmental conditions

Question 4: Resistant spores of living organisms together with cosmic dust might have reached the earth accidentally from other planets of universe according to –
a. Theory of Abiogenesis
b. Theory of Biogenesis
c. Cosmozoic theory
d. Theory of Catastrophism

Question 5: Which era is dubbed as the age of prokaryotic microbes?
a. Precambrian
b. Phanerozoic
c. Archean
d. Proterozoic

Question 6: A baby has been born with a small tail. It is a case exhibiting –
a. Retrogressive evolution
b. Mutation
c. Atavism
d. Metamorphosis

Question 7: Primate closest to humans in evolution is –
a. Lemur
b. New World Monkey
c. Gorilla
d. Tree Shrew

Question 8: Which of the following was a land dinosaur?
a. Triceratops
b. Pteranodon
c. Archaeopteryx
d. Ichthyosaur

Question 9: Origin of primitive mammals occurred during –
a. Triassic period
b. Jurassic period
c. Cretaceous period
d. Tertiary period

Question 10: Which of the following statements is correct regarding evolution of mankind?
a. Homo erectus is preceded by Homo habilis
b. Neanderthal man and Cro-Magnon man were living at the same time
c. Australopithecus was living in Australia
d. None of these

India Study Solution
Biology Guide and Solution : Evolution
Solutions of MCQs Test Series – Set 1 (Q. No. 1 – 10)
Answer 1: (c).   Answer 2: (a).

Answer 3: (a) Hint: This is because if they are eaten or destroyed, they will be no more present in any form on earth and hence, cannot be fossilised.

Answer 4: (c).   Answer 5: (a).   Answer 6: (c).   Answer 7: (c).   Answer 8: (a).   Answer 9: (b).   Answer 10: (a).

 Genetics and Evolution - Biology Objective Questions, Test Series 

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Physics solved objective questions, test series: Newton’s Laws of Motion and Friction

Physics guide, solved MCQ test series, objective questions for preparing NEET, IITJEE, Joint Entrance Exams and other competitions.
Newton’s Laws of Motion and Friction (Topics):
Force and Inertia; Law of Inertia; Newton’s First Law of Motion; Center of Mass; Momentum; Newton’s Second Law of Motion; Impulse; Newton’s Third Law of Motion; Law of Conservation of Linear Momentum and its applications; Variable Mass; Free Body Diagrams; Pulleys; Equilibrium of Concurrent Forces; Constraint Equations; Pseudo Force; Static and Kinetic Friction; Laws of Friction; Rolling Friction; Centripetal Force and its applications; Impulse; Collision  

Physics: Newton’s Laws of Motion and Friction

Multiple Choice Questions (MCQs) – Set 2 (Q. No. (11-20)

Question 11: Two masses are connected by a string which passes over a pulley accelerating upward at a rate A as shown. If a1 and a2 be the acceleration of bodies 1 and 2 respectively then:
www.indiastudysolution.com - Phy MCQ image

Question 12: The pendulum hanging from the ceiling of a railway carriage makes angle 300 with the vertical, when it is accelerating. The acceleration of the carriage is:

Question 13:Two particles A and B, each of mass m, kept stationary by applying a horizontal force F = mg on particle B as shown in fig. Then –
www.indiastudysolution.com -  Newton’s Laws of Motion and Friction image
a. Tan β = 2 tan α     b. 2T1 = 5T2     c. T1 √2 = T2 √5    d. None of these
(1) a, b                     (2) b, c             (3) c, d                 (4) a, c

Question 14: Action and reaction –
a. Act on two different objects
b. Have opposite direction
c. Have equal magnitude
d. All of these

Question 15: Two block A and B placed on a plane surface as shown in the figure. The mass of block A is 100 kg and that of block B is 200 kg. Block A is tied to a stand and block B is pulled by a force F. If the coefficient of friction between the surfaces of A and B is 0.2 and the coefficient of friction between B and the plane is 0.3 then for the motion of B the minimum value of F will be –
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Question 16: If a block moving up an inclined plane at 300 with a velocity of 5 m/s, stops after 0.5 s, then, coefficient of friction will be nearly –
a. 0.5
b. 0.6
c. 0.9
d. 1.1

Question 17: A fireman wants to slide down a rope. The breaking load for the rope is 3/4th of the weight of the man. With what minimum acceleration should the fireman slide down? Acceleration due to gravity is g.
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Question 18: A 13 m ladder is placed against a smooth vertical wall with its lower end 5 m from the wall. What should be the maximum coefficient of friction between ladder and floor, so that it remains in equilibrium?
a. 0.36
b. 0.72
c. 0.21
d. 0.52

Question 19: A bird is sitting in an air tight cage. The cage is put on a weighing machine. It reads W1. The bird now starts flying. The weighing machine reads W2. Then:
a. W1< W2
b. W2< W1
c. W1 = W2
d. None

Question 20: A body of mass M is kept on a rough horizontal surface (friction coefficient = µ). A person is trying to pull the body by applying a horizontal force but the body is not moving. The force by the surface on A is F where –

  Newton's Laws of Motion and Friction - Physics Objective Questions, Test Series 

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