Online Test - Educationopedia

1.The magnetic potential energy, when a magnetic bar of magnetic moment m is placed perpendicular to the magnetic field B is a) _ mB b) Zero c) _mB d) mB

2.An ideal fluid is flowing in a non-uniform cross-sectional tube XY (as shown in the figure) from end X to end Y. If K1 and K2 are the kinetic energy per unit volume of the fluid at X and Y respectively, then the correct option is : a) K1 = K2 (2) b) K1 = K2 c) K1 > K2 d) K1 < K2

3.A step up transformer is connected to an ac mains supply of 220 V to operate at 11000 V, 88 watt. The current in the secondary circuit, ignoring the power loss in the transformer, is a) 8 mA b) 4 mA c) 0.4 A d) 4 A

4.The spectral series which corresponds to the electronic transition from the levels n2 = 5, 6,… to the level n1 = 4 is a) Pfund series b) Brackett series c) Lyman series d) Balmer series

5.Interference pattern can be observed due to superposition of the following waves: A.y = a sinωt ,B.y = a sin2ωt ,C.y = a sin(ωt – φ) ,D.y = a sin3ωt Choose the correct answer from the options given below. a) B and C b) B and D c) A and C d) A and D

6.A wave has a frequency of 400 Hz and a wavelength of 2 m. What is the speed of the wave? a) 800 m/s b) 400 m/s c) 600 m/s d) 200 m/s

7.A force of 5 N acts on a body of mass 10 kg. What is the acceleration produced in the body? a) 0.5 m/s² b) 5 m/s² c) 10 m/s² d) 50 m/s²

8.A 10-kg block is moving with a velocity of 4 m/s. The block collides elastically with another block of mass 5 kg at rest. What is the velocity of the 5-kg block after the collision? a) 4 m/s b) 2 m/s c) 6 m/s d) 8 m/s

9.In an atom, the energy of an electron in the second orbit is -3.4 eV. What is the energy of the electron in the first orbit? a) -13.6 eV b) -6.8 eV c) -1.8 eV d) -3.4 eV

10.An object of mass 100 kg falls from point A to B as shown in figure. The change in its weight, corrected to the nearest integer is (RE is the radius of the earth) a) 49 N b) 89 N c) 5 N d) 10 N

11.The two-dimensionalmotion of a particle, described byr = (î + 2ĵ) A cos(ωt)is a/an: parabolic path elliptical path periodicmotion simple harmonic motion Choose the correct answer from the options given below: a) B, C and D only b) A, B and C only c) A, C and D only d) C and D only

12.Two wires of the same material and length have radii in the ratio 2:1. The ratio of their resistances is: a) 1:4 b) 4:1 c) 1:2 d) 2:1

13.The output Y for the inputs A and B of the given logic circuit is : (1) A̅.B̅ (2) A.B (3) A̅+B̅ (4) A + B

14.The steady state current in the circuit shown below is : (1) 0.67 A (2) 1.5 A (3) 2 A (4) 1 A

15.A box of mass 5 kg is pulled by a cord, up along a frictionless plane inclined at 30° with the horizontal. The tension in the cord is 30 N. The acceleration of the box is (Take g = 10 m s–2 ) 2 m s –2 Zero 0.1 m s –2 1 m s –2

16.The correct decreasing order of atomic radii (pm) of Li, Be, B and C is Be > Li > B > C Li > Be > B > C C > B > Be > Li Li > C > Be > B

17.The vapor pressure of water at 25°C is 23.8 mm Hg. What is the boiling point of water at this pressure? a) 90°C b) 100°C c) 80°C d) 110°C

18.Which of the following compounds has the highest boiling point? a) Methane b) Ethane c) Propane d) Butane

19.Which of the following is not a property of transition metals? a) They form colored compounds b) They exhibit variable oxidation states c) They have high melting points d) They are poor conductors of electricity

20.Which of the following is an example of a Lewis acid? a) ( NH_3 ) b) ( H_2O ) c) ( BF_3 ) d) ( CH_4 )

21.Which of the following is a correct statement? a) All alkali metals have low melting points b) Alkali metals have high ionization energies c) Alkali metals form acidic oxides d) Alkali metals are found in nature in their pure form

22.Statement I: Propene on treatment with diborane gives an addition product with the formula . ((CH3)2-CH)3-B Statement II: Oxidation of ((CH3)2-CH)3-B with hydrogen peroxide in presence of NaOH gives propan-2- ol. In the light of the above statements, choose the most appropriate answer from the options given below: Statement I is correct but Statement II is incorrect Statement I is incorrect but Statement II is correct Both Statement I and Statement II are correct Both Statement I and Statement II are incorrect

23.Which of the following molecules has "NON ZERO" dipole moment value? (1) CCl4 (2) HI (3) CO2 (4) BF3

24.Which of the following compounds is a non-polar molecule? a) ( H_2O ) b) ( CO_2 ) c) ( NH_3 ) d) ( HCl )

25.Identify the gas evolved when Zn reacts with NaOH: A) CO₂ B) NO₂ C) H₂ D) NH₃

26.Match List-I with List-II : List-I (Atom/Molecule) List-II (Property) A. Nitrogen atom I. Paramagnetic B. Fluorine molecule II. Most reactive element in group 18 C. Oxygen molecule III. Element with highest ionisation enthalpy in group 15 D. Xenon atom IV. Strongest oxidising agent Identify the correct answer from the options given below : A-III, B-I, C-IV, D-II A-I, B-IV, C-III, D-II A-II, B-IV, C-I, D-III A-III, B-IV, C-I, D-II

27.Which of the following pairs of ions will have same spin only magnetic moment values within the pair? Zn2+ , Ti2+ Cr2+ , Fe2+ Ti3+ , Cu2+ V2+ , Cu+ Choose the correct answer from the options given below : C and D only A and D only A and B only B and C only

28.Arrange the following compounds in increasing order of theirsolubilities in chloroform: NaCl, CH3OH, cyclohexane, CH3CN NaCl < CH3CN < CH3OH < Cyclohexane CH3OH < CH3CN < NaCl < Cyclohexane NaCl < CH3OH < CH3CN < Cyclohexane Cyclohexane < CH3CN < CH3OH < NaCl

29 .The correct IUPAC name of the compound 4-ethyl-1-fluoro-2-nitrobenzene 4-ethyl-1-fluoro-6-nitrobenzene 3-ethyl-6-fluoro-1-nitrobenzene 1-ethyl-4-fluoro-3-nitrobenzene

30.The half-life period of a first-order reaction is 10 minutes. How long will it take for the concentration of the reactant to decrease to one-fourth of its initial value? a) 20 minutes b) 30 minutes c) 40 minutes d) 50 minutes

31.The regions with high level of species richness, high degree of endemism and a loss of 70% of the species and habitat are identified as: Natural Reserves Sacred Groves Biodiversity Hotspots Biogeographical Regions

32.The enzyme that breaks down lactose in the human digestive system is: a) Amylase b) Lipase c) Lactase d) Protease

33.The process of DNA replication occurs in the: a) Cytoplasm b) Nucleus c) Mitochondria d) Ribosome

34.Which of the following is a correct statement about the process of transpiration? a) It is a process by which water is absorbed by the roots of plants. b) It helps in the cooling of the plant. c) It occurs only during the night. d) It is a form of passive transport in plants.

35.Which of the following is the largest organ in the human body? a) Brain b) Heart c) Skin d) Liver

36.Which of the following is not a part of the lymphatic system? a) Lymph nodes b) Spleen c) Thymus d) Pancreas

37.Given below are two statements: Statement I: When many alleles of a single gene govern a character, it is called polygenic inheritance. Statement II: In Polygenic inheritance, the effect of each allele is additive. In the light of the above statements, choose the correct answer from the options given below. Statement I is true but Statement II is false Statement I is false but Statement II is true Both Statement I and Statement II are true Both Statement I and Statement II are false

38.Which of the following are required for the light reaction of Photosynthesis? A. CO2 B. O2 C. H2O D. Chlorophyll Light Choose the correct answer from the options given below: A, C, D and E only C, D and E only A and B only A, C and E only

39.The pigment responsible for the green color of plants is: a) Chlorophyll b) Carotenoid c) Anthocyanin d) Xanthophyll

40.The type of connective tissue that stores fat is: a) Bone b) Cartilage c) Adipose tissue d) Blood

41.The process of cell division that results in two identical daughter cells is: a) Mitosis b) Meiosis c) Fertilization d) Binary fission

42.Which of the following is a nucleotide? Uridine Adenylic acid Guanine Guanosine

43.Which of the following are correct about cellular respiration? Cellular respiration is the breaking of C-C bonds of complex organic molecules by oxidation. The entire cellular respiration takes place in Mitochondria. Fermentation takes place under anaerobic condition in germinating seeds. The fate of pyruvate formed during glycolysis depends on the type of organism also. Water is formed during respiration as a result of O2 accepting electrons and getting reduced. Choose the correct answer from the options given below: A, C, D, E only A, B, E only A, B, C, E only B, C, D, E only

44.Which of the following structures is involved in the process of photosynthesis in plants? a) Nucleus b) Chloroplast c) Mitochondria d) Ribosome Answer

45.The type of respiration that occurs in the absence of oxygen is called: a) Aerobic respiration b) Anaerobic respiration c) Fermentation d) Both b and c

46.Which of the following is true for the process of mitosis? a) It produces four genetically identical daughter cells. b) It involves two divisions of the nucleus. c) It occurs only in reproductive cells. d) It is essential for growth and repair of tissues.

47.Recombination between homologous chromosomes is completed by the end of Diakinesis Zygotene Diplotene Pachytene

48.Match List-I with List-II

Choose the correct answer from the options given below:

A-II, B-I, C-IV, D-III A-IV, B-I, C-II, D-III A-I, B-II, C-III, D-IV A-II, B-III, C-IV, D-I

49.Which of the following are the primary producers in an ecosystem? a) Herbivores b) Carnivores c) Plants d) Decomposers

50.The site of fertilization in humans is: a) Ovary b) Fallopian tube c) Uterus d) Vagina

51.Which of the following is an example of a vestigial organ? a) Appendix b) Heart c) Lungs d) Liver

52.What is the role of RNA polymerase III in the process of transcription in Eukaryotes ? Transcription of tRNA, 5 srRNA and snRNA Transcription of precursor of mRNA Transcription of only snRNAs Transcription of rRNAs (28S, 18S and 5.8S)

53.Which of the following are NOT considered as the part of endomembrane system ? Mitochondria Endoplasmic Reticulum Chloroplasts Golgi complex Peroxisomes Choose the most appropriate answer from the options given below : A, C and E only A and D only A, D and E only B and D only

54.Which of the following functions is carried out by cytoskeleton in a cell ? Protein synthesis Motility Transportation Nuclear division

55.Which type of joint is present in the human elbow? Ball and socket Pivot Hinge Gliding

56.The part marked as ‘x’ in the given figure is Endosperm Thalamus Endocarp Mesocarp

57.Which of the following statements is correct ? Biomagnification refers to increase in concentration of the toxicant at successive trophic levels. Presence of large amount of nutrients in water restricts 'Algal Bloom' Algal Bloom decreases fish mortality Eutrophication refers to increase in domestic sewage and waste water in lakes.

58.The parts of human brain that helps in regulation of sexual behaviour, expression of excitement, pleasure, rage, fear etc. are : Corpora quadrigemina & hippocampus Brain stem & epithalamus Corpus callosum and thalamus Limbic system & hypothalamus

59.Upon exposure to UV radiation, DNA stained with ethidium bromide will show Bright blue colour Bright yellow colour Bright orange colour Bright red colour

60.What is the role of RNA polymerase III in the process of transcription in Eukaryotes ? Transcription of tRNA, 5 srRNA and snRNA Transcription of precursor of mRNA Transcription of only snRNAs Transcription of rRNAs (28S, 18S and 5.8S)