Online Chemistry test series questions answers for NEET, IITJEE, Medical preparation | Hydrogen and its Compounds

Chemistry solved Test Series, MCQ practice questions for preparation of NEET, IIT 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 3 (Q. No. 21-30)
Question 21: In which property listed below hydrogen does not resemble alkali metals?
a. Nature of oxide
b. Reducing nature
c. Tendency to form cation
d. Presence of one electron in valence shell

Question 22: Heavy water (D2O) freezes at:
a. 00C
b. 3.80C
c. -3.80C
d. 380C

Question 23: H2 gas is liberated when H2O2 reacts with –
a. Acidified KMnO4
b. O3
c. Acidified K2Cr2O7

Question 24: Hydrogen gas behaves as an oxidising agent in its reaction with:
a. Chlorine
b. Potassium
c. Nitrogen
d. Sulphur

Question 25: Pure water can be obtained from sea water by:
a. Centrifugation
b. Plasmolysis
c. Reverse osmosis
d. Sedimentation

Question 26: Volume strength of 500 ml solution containing 3.4 g of H2O2 is –
a. 11.2
b. 6.8
c. 1.12
d. 2.24

Question 27: In basic medium, H2O2 acts as an oxidising agent in its reaction with:
a. Cr2(SO4)3
b. Ag2O
c. K3[Fe(CN)6]
d. K4[Fe(CN)6]

Question 28:Which isotope of hydrogen is radioactive in nature?
a. Protium only
b. Deuterium only
c. Deuterium and tritium
d. Tritium only

Question 29: Among the following, identify the compound which cannot act as both oxidising and reducing agents?
a. H2O2
b. H2
c. SO2
d. Cl2

Question 30: Hydrogen combines with other elements by:
a. Losing an electron
b. Gaining an electron
c. Sharing an electron
d. a, b, c all are correct

India Study Solution - Chemistry Practice Questions
hydrogen and its compounds
Solutions of Chemistry MCQ Test Series MCQ Practice Questions – Set 3 (Q.No. 21 – 30)
Answer 21: (a).

Answer 22: (b) Hint: Freezing point of heavy water is at 3.80C.

Answer 23: (d).

Answer 24: (b) Hint: An oxidising agent is a species which accepts an electron or electrons. Hydrogen accepts an electron from potassium when it forms KH.
H2 + 2K → 2KH (K+H-).

Answer 25: (c).   Answer 26: (d).

Answer 27: (a) Hint: In basic medium, H2O2 oxidises Cr2(SO4)3

2Cr3+ + 10H- + 3H2O2 → 2CrO2-4 + 8H2O
Cr – Oxidation No. = + 3         Cr – Oxidation No. = + 6

Answer 28: (d).   Answer 29: (b).   Answer 30: (d).

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Projectile Motion - MCQ test series with solutions | Prepare Physics for NEET, IIT JEE, MBBS and B Tech entrance exams

Physics solved MCQ test series, questions answers expected in NEET, IIT JEE, Medical Entrance Exams, Engineering Entrance Exams; B Tech Admission, MBBS Admission Tests and other such competitive exams.
Practice questions answers from some of these topics (Projectile Motion - Syllabus):
Projectile Motion; Projectile Motion in an inclined plane; Relative Motion between two Projectiles; Motion in two dimensions; Cases of Uniform Velocity and Uniform Acceleration-Projectile Motion; Motion of objects in three dimensional space

Physics Test Series: Projectile Motion

Multiple Choice Questions – Set 3 (Q. No. 21-30)

Question 21: A projectile has –
a. Minimum velocity at the point of projection and maximum at the maximum height
b. Maximum at the point of projection and minimum at the maximum height
c. Same velocity at any point in its path
d. Zero velocity at the maximum height irrespective of the velocity of projection

Question 22: A ball is thrown at an angle of 300 to the horizontal. It falls on the ground at a distance of 90m. If the ball is thrown with the same initial speed at an angle 300 to the vertical, it will fall on the ground at a distance of –
a. 120 m
b. 27 m
c. 90 m
d. 30 m

Question 23: At the top of the trajectory of a projectile, the directions of its velocity and acceleration are:
a. Parallel to each other
b. Anti-parallel to each other
c. Inclined to each other at an angle of 450
d. Perpendicular to each other

Question 24: For a projectile, the physical quantity that remains constant is –
a. Vertical component of velocity and kinetic energy
b. Potential energy and kinetic energy
c. Horizontal component of velocity and acceleration
d. Potential energy and acceleration

Question 25: In the motion of a projectile freely under gravity, its:
a. Total energy is conserved
b. Momentum is conserved
c. Energy and momentum both are conserved
d. None is conserved

Question 26: A projectile is thrown with a speed v at an angle θ with the vertical. Its average velocity between the instants it crosses half the maximum height is –
a. V sin θ, horizontal and in the plane of projection
b. V cos θ, horizontal and in the plane of projection
c. 2v sin θ, horizontal and perpendicular to the plane of projection
d. 2v cos θ, vertical and in the plane of projection

Question 27: A ball is thrown up with a certain velocity at an angle θ to the horizontal. The kinetic energy KE of the ball varies with height h as: - image

Question 28: A ball is projected with velocity 80 m/s and an angle 300 from horizontal the range will be –
a. 562 m
b. 286 m
c. 188 m
d. 1130 m

Question 29: A solid sphere and a hollow sphere are thrown horizontally from a cliff with equal velocities respectively. Then which sphere reaches first on earth?
a. Solid sphere
b. Hollow sphere
c. Both spheres simultaneously
d. We cannot say because masses of spheres are not given.

Question 30: Two projectiles of same mass and with same velocity are thrown at an angle 600 and 300 with the horizontal, then which will remain same –
a. Time of flight
b. Range of projectile
c. Max height acquired

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Genetics and Evolution - Solved test series | Prepare for NEET, MBBS Admission Tests

Biology TEST SERIES: Evolution (Genetics and Evolution)

Multiple Choice Questions – Set 3 (Q. No. (21-30)
Online Biology Guide and Solution: Solved MCQ test series and Practice Questions to prepare online for NEET, AIPMT, MBBS Admission Tests, Medical Entrance Exams and other competitions.
Solved MCQ Test Series, Practice Questions from topics covered -
Evolution (Genetics and Evolution) - Syllabus
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; Lamarckism; Darwinism; Mutation Theory of Hugo De Vries; Hardy - Weinberg Principal; Speciation; Adaptive Radiation; Human Evolution. 
Biology Solution and Guide: Evolution
MCQ Test Series – Set 3 (Q. No.21-30)

Question 21: Random genetic drift in a population probably results from –
a. Highly genetically variable individuals
b. Interbreeding within this population
c. Constant low mutation rate
d. Large population size

Question 22: Who was the first civilised man?
a. Cro-Magnon man
b. Neanderthal man
c. Heidelberg man
d. Ternifier man

Question 23: Dryopithecus occurred about –
a. 2.5 x 106 years back
b. 25 x 106 years back
c. 50 x 106 years back
d. 75 x 106 years back

Question 24: Reptilian feature of Archaeopteryx is –
a. U-shaped furcula
b. Beak
c. Abdominal ribs
d. Feathers

Question 25: Coevolution is –
a. That evolution which proceeds gradually with progressive change in a given evolutionary line
b. Evolution by saltation
c. Long term evolutionary adjustment of one group of organisms to another
d. Inclusive fitness

Question 26: Which of the following was likely to have been absent in a free molecule state, in the primitive atmosphere of the earth?
a. Carbon
b. Oxygen
c. Hydrogen
d. Nitrogen

Question 27: Heart is four chambered in –
a. Amphibia
b. Fishes
c. Mammals
d. Reptiles

Question 28: Dryopithecus has –
a. Semi-erect posture
b. Brow ridges
c. Ape like jaw
d. All of these

Question 29: Due to discovery of which of the following in 1980s, the evolution was termed as RNA world?
a. m-RNA, t-RNA, r-RNA synthesis proteins
b. In some viruses, RNA is genetic material
c. RNA has enzymatic property
d. RNA is not found in all cells

Question 30: Dryopithecus has –
a. Semi-erect posture
b. Brow ridges
c. Ape like jaw
d. All of these

India Study Solution
Biology Guide and Solution: Evolution (Genetics and Evolution)
Solutions of Biology Test Series – Set 3 (Q. No.21 – 30)

Answer 21: (b).   Answer 22: (b).   Answer 23: (b).   Answer 24: (c).   Answer 25: (c).   Answer 26: (b).   Answer 27: (c).   Answer 28: (d).   Answer 29: (c).   Answer 30: (d).

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