0% Report a question What's wrong with this question? You cannot submit an empty report. Please add some details. 12345678910 Science Class 10 This Quiz Contains a Set of 10 Questions. Passing cut-off is 60%. To Start the Quiz... Click on the Start Button. All the Best. A prism ABC (with BC as a base) is placed in different orientations. A narrow beam of white light is incident on the prism as shown in below Figure. In which of the following diagrams, after dispersion, the third colour from the top of the spectrum corresponds to the colour of the sky? (i) (ii) (iii) (iv) In the following cases, a ray is incident on a concave mirror. In which case is the angle of incidence equal to zero? A ray parallel to the principal axis. A ray passing through the centre of curvature and incident obliquely. A ray passing through the principal focus and incident obliquely. A ray incident obliquely to the principal axis, at the pole of the mirror. Assertion (A): Decomposition of vegetable matter into compost is an endothermic reaction. Reason (R): Decomposition reaction involves breakdown of a single reactant into simpler products. Both A and R are true and R is the correct explanation of A Both A and R are true and R is not the correct explanation of A A is true but R is false A is False but R is true Which of the following is not a role of decomposers in the ecosystem? Natural replenishment of soil. Enrichment of oxygen in atmosphere. Waste decomposition. Break-down of dead remains. Assertion (A): Resins and gums are stored in old xylem tissue in plants. Reason (R): Resins and gums facilitate transport of water molecules. Both A and R are true and R is the correct explanation of A Both A and R are true and R is not the correct explanation of A A is true but R is false A is False but R is true Observe the three figures given below. Which of the following depicts tropic movements appropriately? B and C A and C B only C only If a beam of red light and a beam of violet light are incident at the same angle on the inclined surface of a prism from air medium and produce angles of refraction r and v respectively, which of the following is correct? r = v r > v r = 1/v r < v Which of the following correctly represents a balanced chemical equation? Fe(s) + 4H2O(g) → Fe3O4 (s) + 4H2(g) 3Fe(s) + 4H2O(g) → Fe3O4 (s) + 4H2(g) 3Fe(s) + H2O(g) → Fe3O4 (s) + H2(g) 3Fe(s) + 4H2O(g) → Fe3O4 (s) + H2(g) Which of the following solutions are electrolytes? i. Dil. HCl ii. Sugar Solution iii. Alcohol in water iv. Lime water i and ii i and iv ii, iii and iv i, ii and iv Identify the phase of circulation which is represented in the diagram of the heart given below. Arrows indicate contraction of the chambers shown. Blood transferred to the right ventricle and left ventricle simultaneously. Blood is transferred to lungs for oxygenation and is pumped into various organs simultaneously. Blood transferred to the right auricle and left auricle simultaneously. Blood is received from lungs after oxygenation and is received from various organs of the body. Your score is 0% Restart quiz
