Science 2004 CBSE [ Delhi ] Set III
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Q1
What force makes an apple on a tree to fall to the ground and what fo rce makes a balloon filled with hydrogen to rise into air? Out of syllabus Marks:1View AnswerAnswer:
Out of syllabus. -
Q2
Write the function of hormone ‘thyroxin’ in our bodies. Marks:1View AnswerAnswer:
Thyroxin regulates body growth by regulating metabolism of carbohydrate, protein and fats. -
Q3
Name the part of hind brain which takes part in regulation of respiration. Marks:1View AnswerAnswer:
Medulla takes part in regulation of respiration. -
Q4
Give an example of a vestigial organ present in human body. Marks:1View AnswerAnswer:
Out of syllabus. -
Q5
Draw a figure to show how the rate of a chemical reaction in general changes as the temperature of reactants is increased step-wise. Marks:1View AnswerAnswer:
Out of syllabus. -
Q6
Name any two neutral oxides. Marks:1View AnswerAnswer:
Out of syllabus. -
Q7
What type of force or forces keep the Sun and its planets in their
respective places?Out of syllabus Marks:1View AnswerAnswer:
Out of syllabus. -
Q8
How can it be shown that a magnetic field exists around a wire through which a direct electric current is passing? Marks:1View AnswerAnswer:
Magnetic field around a current carrying wire can be shown by deflection of magnetic needle of magnetic compass. -
Q9
Write the (i) name and (ii) formula of the functional group present in the compound, CH3COOH. Marks:1View AnswerAnswer:
(i) Name of the functional group = carboxylic acid (ii) Formula of the functional group present = - COOH -
Q10
What is the chemical name of washing soda? Name the three chief raw materials used for making washing soda by the Solvay process. Marks:2View AnswerAnswer:
The chemical name of washing soda is sodium carbonate decahydrate. The three chief raw materials used for making washing soda by the Solvay process are sodium chloride solution, carbon dioxide, ammonia.
