Page 1 :
Fg Qa :, , , , , , , , , , , , , , 8. Which of the given options correctly represents the Parent acid and base of Calcium Carbonate?, PARENTACID PARENT BASE, @ Hal NaOH, () H,CO, Ca(OH),, © H,PO, CaSO,, @ H,SO, Caso,, 9. How will you protect yourself from the heat generated while diluting a concentrated acid?, (a) Byadding acid to water with constant stirring. (b)_ By adding water to acid with constant stirring AZ, (©) By adding water to acid followed by base (@) By adding base to acid with constant stirring, 10. Whyisit important to balance a skeletal chemical equation?, @) To verify law of conservation of energy. (b) To verify the law of constant proportion., (©) Toverify the law of conservation of mass. (4) Toverify the law of conservation of momentum, 1. Carefully study the diagram of the human respiratory system with labels A, B, C and D. Select the option which gives correct, identification and main function and /or characteristic, _ (i), Bronchus, Cut end of rib (ii), (iii), Lung 7, @) (Trachea: Itis supported by bony rings for conducting inspired air, (6) (ii) Ribs: When we breathe out, ribs are lifted, (©). (ii) Alveoli: Thin-walled sac like structures for exchange of gases, (@) (iv) Diaphragm: Itis pulled up when we breathe in, 12. Identify the option that indicates the correct enzyme that is secreted in location (i), (ii) and (iii)., $—~#, @) (islipase, (i)-trypsin, (ii)-pepsin (b) _(i-amylase,(i)-pepsin, (i)-trypsin, (©) (itrypsin, (ii)-amylase, (ii)-carboxylase (A) (i)-permease, (ii)-carboxylase, (ii)-oxidase, 13. Opening and closing of stomatal pore depends on, (a) Atmospheric temperature (b) oxygen concentration around stomata, (©) carbon dioxide concentration around stomata (d)_water content in the guard cells, c > (Gecencen), SQP 21-22-4 Science, 14. The figure given below shows a schematic plan of blood circulation in humans with labels (i) to (iv). Identify the correct label, with its functions?, (iii), (iv), @ (Pulmonary vein - takes impure blood from body part, (b) (i) Pulmonary artery - takes blood from lung to heart., (©) (ii) Aorta - takes blood from heart to body parts, (@) (iv) Vena cava takes - blood from body parts to right auricle, 15, Identify the phase of circulation which is represented in the diagram of heart given below., Arrows indicate contraction of the chambers shown. y, (@) Blood transferred to the right ventricle and left ventricle simultaneously., (b) Blood is transferred to lungs for oxygenation and is pumped into various A, 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 x, of the body., 16. Observe the diagram of Human digestive system, , , , (ii), (iii), , ay