(Important Questions) Important Question For CBSE Class X Science Board Examination 2009-10 (Set -10)

Q. 101. What is denatured ethyl alcohol?

Q. 102. How many hydrocarbons can be attached to a ketone group?

Q. 103. What does the oxidation of alcohols give?

Q. 104. What is formalin and where is it used?

Q. 105. Give the reaction between methanal and hydrogen cyanide.

Q. 106. Give the general formula of carboxylic group.

Q. 107. What is used as a catalyst to prepare acetic acid industrially?

Q. 108. Give the name and chemical formula for monomer of Teflon.

Q. 109. What is the name and chemical formula of monomer unit of natural rubber?

Q. 110. Give the name and chemical formula of the by product obtained in while manufacturing soap.

Q. 111. Which functional group is present in detergents?

Q. 112. What is the function of polar tail of detergent molecule?

Q. 113. What is holozoic nutrition?

Q. 114. What is the full form of NADP?

Q. 115. Where does the biosynthetic phase of photosynthesis take place?

Q. 116. How are ATP and NADPH2 synthesised in light phase useful in biosynthetic phase?

Q. 117. Which organ in grasshopper grinds the food particles?

Q. 118. In mammals, which teeth are used for grinding and chewing?

Q. 119. Which are the parts of small intestine?

Q. 120. What is the function of villi present in small intestine?

Q. 121. How many times more energy is released by oxidation of a glucose molecue by aerobic respiration compared to anaerobic respiration?

Q. 122. What is the function of lenticels?

Q. 123. What will you expect in stomata when the carbondioxide concentration increases in the leaf?

Q. 124. What are the openings of trachea called?

Q. 125. Where does each bronchile terminate?

Q. 126. During photosynthesis electrons are released from which molecule?

Q. 127. During photosynthesis from where is oxygen released?

Q. 128. What is the function of incisors?

Q. 129. Where is NADPH2 formed?

Q. 130. What provides tensile strength to the inner wall of tracheae?

Q. 131. Through which organ are water and minerals transported in pteridiphytes and gymnosperms?

Q. 132. What is ascent of sap?

Q. 133. How are sieve tube and companion cell formed?

Q. 134. What controls the actions of sieve tube?

Q. 135. Which organ transports food in pteridophytes and gymnosperms?

Q. 136. How do food particles enter phloem?

Q. 137. What is translocation?

Q. 138. What is conjugated protein?

Q. 139. Where are erythrocytes formed?

Q. 140. Which type of WBC produces immunoglobulins?

Q. 141. What converts prothrombin to thrombin while blood clotting?

Q. 142. Where are antigens present?

Q. 143. A person with O blood group will not have which type of antigen?

Q. 144. What is the function of tricuspid valve?

Q. 145. In context to human heart what is known as diastolic stage?

Q. 146. Why are the walls of arteries elastic and thick?

Q. 147. Why do veins contain valves?

Q. 148. What is lymph?

Q. 149. Name the excretory organ of sponges.

Q. 150. What is the opening of nephrostome called?