Question 4 :
In the equation, 2Mg + O{tex}_2{/tex} → heat 2MgO, the reactants are
Question 6 :
Compounds are formed when the atoms of two or more different elements combine in a fixed ratio.
Question 9 :
The number of protons and neutrons present in the nucleus of an atom of an element is called atomic number.
Question 11 :
Click and choose the correct answer.<br>Which process involves coating iron with a thin layer of zinc?
Question 14 :
Click and choose the correct answer.<br>Which non-metal is used in the steel industry to remove impurities?
Question 16 :
Click and choose the correct option.<br>Kinetic energy of an object depends on its velocity and __________.
Question 18 :
Click and choose the correct option.<br>A ray of light obtained as a result of reflection from a surface is called an incident ray.
Question 23 :
Click and choose the correct answer.<br>A dry cell converts chemical energy into
Question 24 :
Click and choose the correct option.<br>In a spectrum, which of the following colours appear at the bottom?
Question 25 :
A black paper absorbs light of all the colours and reflects none.
Question 27 :
The distance of the image in front of the plane mirror is
Question 32 :
Study the figures given below and answer the questions.<br><img style='object-fit:contain' src="https://storage.googleapis.com/teachmint/question_assets/ICSE%20-%20Class%207/5fe4d18c8ff9ad62dd5356e5" /><br> Identify figures A and B.
Question 35 :
Click and choose the correct option.<br>Non-seeded plants are also known as
Question 37 :
Click and choose the correct answer.<br>The optimum temperature at which the photosynthesis occurs best is around
Question 40 :
Click and choose the correct option.<br>Tiny opening within the layer of the bark, are called
Question 41 :
A tapeworm is a flatworm that lives in the human intestine.
Question 43 :
Click and choose the correct option.<br>When the oxidation of food takes place in the presence of oxygen, it is called
Question 44 :
Click and choose the correct option.<br>Green plants absorb water from the soil through
Question 45 :
Click and choose the correct option.<br>Which of the following is considered as a farmer’s friend?