Question 1 :
One of the most common applications of chemical effect of electric current is __________.

Question 3 :
The correct combination of terms with reference to an animal cell is _____.

Question 5 :
Match the agricultural implement with the following options given Seed drill is related to

Question 7 :
If you roll a pencil from an inclined plane, then cover the surface by cloth and roll the pencil again. In which case does it travel the farthest distance?

Question 8 :
Is it True or false that increased concentration of nitrogen in air is believed to cause global warming?

Question 9 :
<img style='object-fit:contain' src='https://teachmint.storage.googleapis.com/question_assets/cbse_ncert/61b1d0faf59b460d7261f39f.PNG' /> Refer to the above figure. Can Boojho at C see the position of the image of an object situated at A in the plane mirror ?

Question 10 :
The excessive quantities of chemicals released in water acts as nutrients for the growth of which organism?

Question 13 :
Choose the correct word for the given clue. Clue - Secretion of endocrine glands.

Question 15 :
The power of an earthquake is expressed in terms of a magnitude on a scale called

Question 17 :
The to and fro motion of an object is known as _______ motion.

Question 18 :
<img style='object-fit:contain' src='https://teachmint.storage.googleapis.com/question_assets/cbse_ncert/61b1d0b7f59b460d7261f344.png' /> From the above image ,Complete the crossword given below with the help of clues. Across 1: Substance used as synthetic wool

Question 20 :
<img style='object-fit:contain' src='https://teachmint.storage.googleapis.com/question_assets/cbse_ncert/61b1d0c3f59b460d7261f355.PNG' /> In the above figure, an activity is shown. We will need copper sulphate and two copper plates of size around 10 cm × 4 cm. Take 250 mL of distilled water in a clean and dry beaker. Dissolve two teaspoonfuls of copper sulphate in it. Add a few drops of dilute sulphuric acid to copper sulphate solution to make it more conducting. Clean copper plates with sand paper. Now rinse them with water and dry them. Connect the copper plates to the terminals of a battery and immerse them in copper sulphate solution figure. Allow the current to pass for about 15 minutes. Now remove the electrodes from the solution and look at them carefully. What colour is the coating?

Question 21 :
A place for Large areas of protected land for conservation of wild, plant and animal resources and traditional life of the tribals living in the area is known as ?

Question 22 :
What will be the results of using fossil fuels only when absolutely necessary ?

Question 27 :
Rana wants to buy shirts for summer. Should he buy cotton shirts or shirts made from synthetic material?

Question 29 :
Paheli: I heard that magnesium is found in plants. In what form is it found in them?

Question 30 :
___________ separates the contents of the cell from the surrounding medium.