TopperGuru1

 Practice these 10 Concepts Clarity MCQs to strengthen your understanding of Chapter 1. These questions are designed according to the CBSE syllabus. Concept Clarity MCQs Q1. Which of the following is a heterotrophic organism? a) Cyanobacteria (b) Fungi (c) Plants (d) None of these  Q2. What is the end product of photosynthesis except glucose? a) Oxygen (b) water (c) both a and b (d) none of these  Q3. Through which of the following does gaseous exchange not occur? a) stems (b) roots (c) leaves (d) none of these  Q4. In which form do plants absorb nitrogen from soil? a) Nitrogen gas (b) Nitrogen dioxide (c) inorganic nitrates or nitrites (d) none of these   Q5.  Which of the following organisms breaks down food outside the body and then absorbs it? a) Mushroom (b) Cuscuta (c) Leeches (d) None of these  Q6. Where does digestion begin in the human alimentary canal? a) Small intestine (b) Stomach (c) Pancreas (d) Mouth Q7. Which of the following is di...

 Practice these 10 Concept Clarity MCQs to strengthen your understanding of Chapter 1. These questions are designed according to the CBSE syllabus. Concept Clarity MCQs Q1. Which of the following observations do not help us determine whether a chemical reaction has taken place? a) change in state (b) change in colour (c) change in quantity (d) change in temperature  Q2. CaO + H₂O  --> Ca(OH)₂ + Heat, Identify the type of reaction a) Combination reaction (b) Decomposition reaction (c) Exothermic reaction (d) Both a and c  Q3. ...................... is used for whitewashing walls. a) Quick lime (b) Slaked lime (c) Soda lime (d) none of these  Q4. Ca(OH)₂ reacts slowly with the ................ in air to form a thin layer of calcium carbonate on the walls. a) Oxygen (b) Nitrogen (c) Carbon dioxide (d) All of these  Q5. Which of the following gives a shiny finish to the walls after whitewashing. a) Carbon dioxide (b) Calcium hydroxide (c) Calcium o...